当前位置：文档库 › 大学英语三(综合教程)第4567单元课后习题详细答案(含原文)

大学英语三(综合教程)第4567单元课后习题详细答案(含原文)

大学体验英语三（综合教程）

Unit 4Cloning and Ethics

Listen and Talk

Lead in

The news that a sheep in Scotland has been successfully cloned 1) ; . What good would it be to clone humans? What would I do with a clone of myself? Then 2) that I could have my clone go into work for me while I went out hiking, biking, skiing, etc.! I really could be in two places at once.

But wait a minute. If that's what I would do with my clone, how do I know that I'm not a clone myself? What if the 3) had himself cloned and sent the clone (that is, me) in to do his work for him? This explains a lot:

—all those mysterious checks I find in my 4) every month (with my signature) but don't remember writing,

—why my wife doesn't seem to notice when I've been out of town,

—all those traffic tickets I have to pay but swear I never received in the first place.

—why my friends say things like, "I thought I saw you out skiing last week," when I know I was at work,

—why I keep getting fines for 5) at the library, when I only check out CD's,

—the 6) to my credit card (the one with my picture on it) from London, Paris, New Y ork ...

I can only hope the original me never gets sentenced to prison.

Key:1. got me wondering; 2. it hit me; 3. original me; 4. bank statement; 5. overdue books;

6. unexplained charges

Passage A: Not Now, Dr. Miracle

2. Answer the following questions with the information from the passage.

1) Why is Antinori called Dr Miracle?

By practicing the most advanced reproductive biological techniques to treat his patients, he has worked a lot of miracles. Now working on cloning, he is challenging the biological limits and striving for another miracle.

2) How do you understand the author's statement that "Dr Miracle and his colleagues are taking one hell of a risk"?

This sentence actually means that with so many social and technical problems unsettled, the odds are against Antinori and his colleagues. If they fail, people may lose their confidence in cloning, and even science as a whole, which is rather catastrophic.

3) With so many problems unsolved, should the technology of cloning humans be prohibited by the government according to the passage? Why?

putting an end to it, which is more dangerous.

4) What's the author's attitude toward cloning?

The author believes that cloning should be allowed in some special cases as a fertility treatment but the science is not ready for it and the research study should be regulated.

5) Would you like to have a cloned brother or sister? Why?

Open

3. Choose the best answer to each question with the information from the passage.

1. The author's purpose in writing the passage is to tell us that ______.

A) the research on cloning humans should be carried out to help infertile couples

B) regulations should be made to direct the science of cloning humans into the right track

C) the research on cloning humans should not be conducted so recklessly

D) Antinori is a great scientist who pushes reproductive biology to the limits

2. By saying "Vatican is no fan of his science", the author implies that ______.

A) V atican has no interest in medical science

B) V atican is against Antinori's cloning plan

C) V atican refuses to accept Antinori as a Catholic

D) V atican is in favor of IVF treatment

3. The phrase "rounding on" (line 1, Para. 3) most probably means ______.

A) supporting

B) surrounding

C) criticizing

D) thinking of

4. In the author's view, the real problem of cloning humans is that ______.

A) secret experiments on cloning are being carried on

B) it leads to complex moral arguments

C) even the scientific community can not reach an agreement

D) cloning science is not advanced enough

5. Severino Antinori is thought of as being dangerous probably because ______.

A) he tries to challenge the biological limits to combat infertility

B) he refuses to say anything about their research base

C) he offers to help the couples who cannot have a baby

D) he claims the Catholic faith, but behaves against it

Anwser: 1.C, 2.B, 3.C, 4.D, 5.A

4.Fill in each of the blanks with an appropriate word.

The Italian doctor Severino Antinori has announced plans to offer human cloning facilities in his private fertility clinics. Antinori is already f for previous controversies such as helping grandmothers to have babies. Y et this time he is not alone in p the idea of human cloning. US scientists are working with him on this project, and a r group –the Raelians –have also announced their intention to offer the service. Of course, with so many couples d for a child yet

probably not work trying to prevent cloning, thus some form of regulation is almost i . At the moment, cloning techniques are far from p and most attempts to clone animals end up in f . Anwser: 1.famous 2.promoting 3.religious 4.desperate

5.shortage

6.inevitable

7.perfect

8.failure

5.Study the definitions of the given words and then decide on the meanings of the words in the given contexts.

1. argument n.

【1】a statement you use to convince people that your opinion about something is correct

【2】a debate in which a number of people put forward different opinions.

【3】a conversation in which people disagree with each other angrily or noisily.

1) The incident triggered fresh arguments about the role of social insurance in China. 【】

2) Bob described how he got into an argument with the street vendor. 【】

3) The evidence she uses to back up her arguments is not reliable. 【】

2. represent v.

【1】to show, to describe

【2】to stand for

【3】to act officially for

1) He was well aware that he represented his nation in the race. 【】

2) The play represents the collision of three generations. 【】

3) The red lines on the map represent railways. 【】

3. tough adj.

【1】strong and determined

【2】rough and violent

【3】difficult, demanding

1) He built up a reputation as a tough businessman.【】

2) Whoever wins the election is to have a tough job getting the economy back on its feet. 【】

3) Y ou must be careful at night in this tough neighborhood.【】

Anwser: 1. 1)【2】2)【3】3)【1】

2. 1)【3】2)【1】3)【2】

3. 1)【1】2)【3】3)【2】

6. Fill in the blanks with the words given below. Change the form where necessary.

combat controversy excessive instinct irrational

prohibition reckless regulation stir string

1. A hacker attacked an e-commerce marketplace site. This is the latest in a ____ of online break-ins in which credit card numbers were stolen.

2. The presence of IBM's CEO caused a ___ of excitement on the campus.

3. Brown's comments on the project caused unexpected ____ over the budget.

4. To ___ poverty in the city, millions of dollars have been spent on training the unemployed workers.

5. Y ou will be overweight if you consume ____ amounts of fat.

6. The effective implementation of environmental laws and ___ is the responsibility of the local government.

7. Trust your ___ and do what you think is right.

8. After 20 hours of non-stop partying, a handful of the bravest or most ___ men will risk their lives in a three-minute dash from six fighting bulls.

9. The ____ on street begging will be in force next month.

10. The court gave the heavy sentence, responding not to the facts but to the ____ public fear. Anwser: 1.string, 2.stir, 3.controversy, https://www.wendangku.net/doc/2f16713442.html,bat, 5.excessive,

6.regulations,

7.instincts,

8.reckless,

9.prohibition, 10. irrational

7. Complete the following sentences with phrases or expressions from the passage. Make changes where necessary.

1. With no paper qualifications ___ , he failed to get a decent job.

2. This high dosage of Vitamin C is an excellent way of helping to ___ nasty colds and viruses.

3. We have exchanged views on everything ___ .

4. Taiwan's PC makers were said to have ____ by launching the first Pentium 4-based laptops.

5. Hundreds of fans ___ to get the signature of their favorite singer, but she didn't show up. Anwser: 1.to his name, 2.keep at bay, 3.under the sun, 4.jumping the gun, 5.line up 8. Translate the following sentences into English.

1. 这只乐队二十世纪八十年代凭借那张专集一举成名。（shot to fame）

The band shot to fame in the 1980s with that single album.

2. 冒一下险吧，你可能还是会输，但赢的机会增加了。（take a risk）

Take a risk, and you may lose again, but you have improved your chances to win.

3. 科学家正极力研究治愈艾滋病（AIDS）的良方。（push ... to the limits）

Scientists are pushing themselves to the limits in their researches for the cure of AIDS.

4. 现在我们知道了网络的意义：鼠标一点就能知晓天下大事。（point）

Now we could see the point of the Internet: we can get information from all over the world just by clicking the mouse.

5. 一些人认为政府迟早将会使克隆人类的研究规范化。（regulate / sooner or later）

Some people believe the government will regulate the research of human cloning sooner or later. 9. First notice the italicized structural similarities between the choice sentences and their simulated reproductions, and then do the simulated translation of the Chinese sentences.

1.Severino Antinori is a rich Italian doctor with a string of private fertility clinics to his name . Tom is a poor man with only a shabby bicycle to his name .

他是一个传奇性人物，名下拥有中国最大的门户（gate ）网站。

2.Antinori shot to fame seven years ago helping grandmothers give birth using donor eggs. She shot to fame after she played the leading role in the movie Titanic .

他不是没有耐心，他只是太累了。

3.But right now there seems to be little anyone can do to keep the cloners at bay .

The efforts to keep terrorism at bay would be in vain without international cooperation.

世界卫生组织（WHO ）正在敦促成员国采取有效措施阻止禽流感的蔓延。

4.Like it or not , the research is going ahead.

Like it or not , English has become the “link language”for large parts of the world.

不管人们喜欢与否，中国传统文化正在受到外来文化的冲击。

5.In jumping the gun , Dr Miracle and his colleagues are taking one hell of a risk.

The newspaper jumped the gun and published the news before it was sure of its reliability. 你不应在实验还没有做完就抢先下结论。

1. He is a legend with the biggest gate website in China to his name.

2. At the beginning of the twentieth century, Einstein shot to fame after he published a series of articles on the Theory of Relativity.

3. The WHO is urging its member countries to adopt effective measures to keep bird fluat bay.

4. Like it or not, the traditional Chinese culture is invaded by foreign cultures.

5. Y ou should not jump the gun in drawing the conclusion before your experiment is finished.

Passage B: I Have His Genes But Not His Genius

12. Fill in the blanks with the information you've obtained from the passage. Don't refer back to it until you have finished.

W. A. Mozart was a great 1) living in the 18th century. He died young, leaving his masterpiece Requiem unfinished. At the 2) of the 21st century, a billionaire who was crazy about the Requiem set up a 3) institute and hired some top biologists to 4) babies from Mozart's DNA. The institute succeeded in producing four babies but only two survived. One was 5) by a woman, who was also among the research group. She had been trying to push the little Mozart toward 6) . However, the boy had his own priorities, and all the mother's efforts turned out fruitless; the boy grew up into an 7) person. Then something happened, and totally changed his life. A reporter heard about the institute and the experiment, and found the young man. As he couldn't 8) that he himself was the copy of Mozart, the media treated him as a 9) . It was a great blow to him. He swore to finish the Requiem to show to the whole world. He immersed himself in the Requiem day and night. Fifteen years passed, and he achieved nothing. Eventually he realized that he only had Mozart's genes but not his 10) .

Anwser: https://www.wendangku.net/doc/2f16713442.html,poser, 2.beginning, 3.secret, 4.clone, 5.adopted,

6.music,

7. ordinary,

8.prove,

9.joke, 10. genius

13. Fill in the blanks with the words given below. Change the form where necessary.

adopt anonymously ban decent gene

genius immerse practically resemblance survive

1. Fox hunters gathered in London to protest the government's attempt to ___ the sport.

2. They fell in love with each other though they have __ nothing in common.

3. With the loan from the bank, the company may be able to ___ the crisis.

4. The students have been advised to ___ a healthy lifestyle - a balanced diet, enough rest and exercise to keep fit.

5. The workers went on strike for ___ working conditions and wages.

6. A business ___ is good at spotting business opportunities and then striking quickly.

7. A group of scientists are working day and night, trying to find the ____ responsible for the disease.

8. The main feature of the online chat is that you can ___ communicate with anyone.

9. Don’t believe what he s ays. His story shows little ___ to the facts.

10. Many teenagers are found to ___ themselves too much in the virtual world presented by the computer games.

Anwser: 1.ban, 2.practically, 3.survive, 4.adopt, 5.decent,

6.genius,

7. gene,

8.anonymously,

9.resemblance, 10. immerse

14. Complete the following sentences with phrases or expressions from the passage. Change the form where necessary.

1. He claimed with pride that he saw the football star Beckham ___ yesterday.

2. The doctor convinced her that she could ____ her baby ___ if she followed his instructions.

3. The President enjoyed his term only for two years before ___; his affair with a woman appeared in the press.

5. Newspapers claimed to ____ embarrassing evidence that Williams didn't graduate from the university.

Anwser: 1. in the flesh, 2. bring … to term, 3. the roof fell in, 4. put up for, 5. dig up 15. Translate the following sentences into English.

1. 乔治对中国文化着了迷，决定去一所夜校学习中文。（be nuts about

George is nuts about the Chinese culture and has decided to learn Chinese in an evening school.

2. 记者们获悉戴安娜（Diana）要来本市访问的消息，迅速赶到机场去获取新闻。（get wind of）The reporters got wind of Diana's visit to the city and rushed to the airport for the news

3. 经过两个月的不懈努力，警方终于在一个南方城市找到了罪犯的踪迹。（track …down））After two months of restless effort, the police finally tracked the criminal down in a southern city.

4. 两家公司已经原则上达成协议实施这项计划。(go ahead with)

The two companies have already agreed in principle to go ahead with the project.

5. 如果你们的质量没有实质性的增长，我认为你们在市场上不会有什么竞争力。(for real)

If your quality isn't improving for real, I don't think you will be competitive in the market.

Unit 5Lifelong Education

Listen and Talk

Lead in

The purpose of education is not only to train youngsters for the 1) , but to prepare them for tomorrow's society. Because of the rapidly changing world, one can argue that changes will be continuous, which will make lifelong learning necessary for those who expect to 2) successfully. While some may argue that their education commenced when they began school and 3) when they completed it, modern reality suggests that education is a lifelong process, and the classroom is merely the beginning of the education process. The 4) of its definition implies that education is lifelong.

Lifelong education 5) and affects all existing educational providers, and extends beyond the formal educational providers to include all bodies and individuals 6) learning activities. Lifelong education means enabling people to learn at different times, in different ways, for different purposes 7) of their lives and careers.

Key: 1. employment market 2. handle the changes 3. concluded

4. very nature

5. builds on

6. involved in

7. at various stages

Passage A: Tongue-tied

2. Answer the following questions with the information from the passage.

1) What was the author's immediate response when the driver passed her a slip of paper?

She wondered if it was a joke or a threat.

2) What did the author mean by saying "clever is not clever if it doesn't communicate"?

She realized that her explanation didn't help because it could not be understood.

3) How much does the author know of the differences between "pro verb", "peculiar" and "idiomatic"?

She might use them subconsciously, but she couldn't give a simple and clear explanation.

4) Why did the author hope that the driver owned a dictionary?

Because she felt depressed at her deformed misleading English explanation.

5) What can we learn from this passage?

Open

3. Choose the best answer to each question with the information from the passage.

1. What does the author imply about the hard-bitten city dwellers?

A) They are not confident about themselves.

B) They are not so willing to help others.

C) They are friendly to strangers.

D) They are not very knowledgeable.

2. What can we infer from the passage?

A) The author is unwilling to help the driver.

B) English is not the author's native language.

C) The driver was slow to understand the author.

D) It is easier to use a word than to explain it.

3. What did the author realize when she found that the driver couldn't understand her?

A) She wasn't as curious as the driver.

B) She didn't really know a lot of her own language.

C) She should feel regretted having agreed to help.

D) She was trapped by the driver for more fare.

4. Why did the author mention "Haste makes waste"?

A) To use it as an example to explain a proverb.

B) To remind the driver to drive slowly.

C) To advise that learning should take time.

D) To tell a story beginning with a saying.

5. Which of the following statements is true according to the passage?

B) The author herself is not a native speaker of English.

C) The driver impressed the author with his eagerness to learn English.

D) The author thought her explanations were very clever.

Anwser: 1.B, 2.D, 3.B, 4.A, 5.C

4. Fill in each of the blanks with an appropriate word.

This is an amusing short story which illustrates how little people sometimes know about their mother tongue. The narrator is a woman, a p___in a taxi whose driver is a Pakistani man e ___to learn English by asking his passengers about new words. Struggling to e___the meanings of a proverb and an idiom, she realizes how little she really knows about the v___of her native language and also w___what kind of answers other, probably equally i___, native passengers might give. In the end she is left hoping that the driver has a d___and that he will use it to teach himself rather than depend on the native speakers for e ___.

Anwser: 1.passenger 2.eager 3.explain 4.vocabulary 5.wonders

6.ignorant

7.dictionary

8.explanations

5. Choose the one word or phrase that best keeps the meaning of the underlined part in each sentence.

1. The coward in me was much too pleased with this solution.

A) courage

B) fear

C) satisfaction

D) personality

2. He returned to his hometown so that he could indulge his passion for football.

A) develop

B) enjoy

C) break

D) limit

3. A desperate man will resort to anything.

A) care for nothing

B) destroy anything within his reach

C) try to kill himself

D) turn to anything for help

4. He jotted down her number on a slip of yellow paper.

A) read carefully

B) wrote down quickly

C) glance quickly at

D) drew with care

5. She looked at him in such distress that he had to look away.

A) amusement

C) pain

D) pleasure

Anwser: 1.B, 2.B, 3.D, 4.B, 5.C

6. Fill in the blanks with the words given below. Change the form where necessary.

assume commit confuse hint mislead

peculiar puzzle quality retreat vague

1. Being the son of a professor does not ___ him for the scholarship consideration.

2. The police suspect that it was John who ___ the murder.

3. So far, the new manager has given little ___ that he won't be any different from the former one.

4. From all the indications, it is safe to ___ that the prices of cars will go down by large margins.

5. Some of his instructions are outdated and others are too ___ to be understood. .

6. The local dialect sounds a little ___ to the people from the north.

7. The failure of the movie hastened her decision to ___ from the glamorous screen and spend more time with her family.

8. The woman's headache ___ the doctor; he couldn't find the cause.

9. The state has laws that protect consumers against fraud or ___ sales practices.

10. He tried to explain the complicated theory to me, but I got even more ___ by the technical terms in his explanation.

Anwser: 1. qualify 2. (had) committed 3. hint 4. assume 5. vague

6. peculiar

7. retreat

8. puzzled

9. misleading 10. confused

7. Complete the following sentences with phrases or expressions from the passage. Make changes where necessary.

1. The local government's decision to reduce unemployment benefits enraged the workers who were laid off and they ____ violent protest.

2. What's the point of ____ for months over something that a good teacher could have explained in minutes?

3. The boy admires his father and ____ his every word.

4. The manager pulled the pencil and pad from his shirt pocket and ____ every word the customer said.

5. At present, the whole world seems to be ____ about how to cope with economic globalization. Anwser: 1. resorted to 2. racking your/one's brains 3. hangs on 4. jotted down 5. at a loss

8. Translate the following sentences into English.

1. 知道原理是一回事，但要付诸实践又是另外一回事。(it's one thing ... it's another ...)

It's one thing to understand the principle, it's another thing to put it into practice.

2. 据报道，慢跑(jogging)可将患心脏病的可能性减少三分之二。(less likely)

It is reported that jogging makes you three times less likely to suffer from a heart attack.

3. 根据最新调查，半数英国人不清楚欧元与英镑的比值。(to have no idea / in relation to) Almost half of the British people have no idea what the euro is worth in relation to the pound,

4. 这片土地本应建成一个供大家享用的公园，但现在却立起了几栋公寓楼。(should have done) The area should have been made into a park for everyone to enjoy but now some apartment buildings stand there.

5. 不知道所有这些相关信息能否凑成一幅关于他的清晰图画。(to add up to)

I'm wondering whether all the related information could add up to a clear picture of him.

9.First notice the italicized structural similarities between the choice sentences and their simulated reproductions, and then do the simulated translation of the Chinese sentences.

1.It's one thing to use a word, it's another to explain it.

It's one thing to talk about reforms, it's another to carry them out for real.

认识到节约能源的重要性是一回事，但在生活的方方面面付诸实施又是另外一回事儿。

2.He looked confused, a reminder that clever's not clever if it doesn't communicate.

He tried to say something funny to break the ice, but soon realized that clever's not clever if no one laughed at it.

销售经理认为，如果销路不好，新产品就不能算好。

3.I went on talking, as if a thousand vague words would add up to one accurate definition. He has studied at college for 7 years as if more degrees would add up to his success.

他不停地编着各种借口来解释为何没能完成任务，好像一千个谎言加起来就可以等于实情。

4.I had no idea because the longer I thought about idioms the less sure I was what they were. She felt the longer she practiced the piano the less skilled she became.

这项调查发现，人们逛商场的时间越长，就越不能控制自己的购物欲望。

5.I can only trust that someone as curious as he is also owns a dictionary.

I assume someone as ambitious as he is will become somebody sooner or later.

我相信像她这样勤奋的人肯定会很快地克服她在英语学习方面的困难。

1. It's one thing to recognize the importance of saving energy, it's another to put it into practice in every aspect of life.

2. The sales manager believes that clever is not clever if the new product doesn’t sell well.

3. He kept on making up excuses for his failure to finish the task as if a thousand lies would add up to the truth.

4. It is found from the investigation that the longer people stay in a store, the less likely they are to control their desire for purchases.

5. I believe that someone as diligent as she is will soon overcome difficulties in the study of English.

Passage B: Returning to College

12. Choose the best answer to each question with the information from the passage.

1. What does the author think of the students on campus?

A) They lack a sense of responsibility.

B) They are too willing to make friends.

D) They fail to realize that college life is precious.

2. What do you think is a ready-made friend, as mentioned in paragraph 3?

A) A friend who offers you help when you are in real need.

B) A friend who is always ready to help you.

C) A friend who is easily and immediately available.

D) A friend who will make everything ready for you.

3. The author thinks that the college students' attitude towards college education is ________.

A) realistic

B) pessimistic

C) unfair

D) objective

4. What is the reason that has made the author return to college?

A) He wants to make some ready-made friends.

B) He intends to acquire knowledge to make more money.

C) He wants to live an independent life.

D) He finds it is a joy to get better educated.

5. The author wants to take calculus because ________.

A) he has a special talent for it

B) he is curious about mathematics

C) he can bring home a good report

D) he is interested in it

Anwser: 1.D, 2.C, 3.C, 4.D, 5.B

13. Fill in the blanks with the words given below. Change the form where necessary.

appeal associate bet deny educate

feature independent refresh stump usage

1. The new course we are going to take ___ Shakespeare.

2. I begged him to tell me the truth , but he ___ doing anything illegal.

3. I'd rather stay at home than go to the exhibition at the gallery; modern arts really don't ___ to me.

4. The original ___ of "gung ho" can be traced back to a Chinese word meaning "work together".

5. It's so easy and I ___ you'll learn it within five minutes.

6. I have learned to take care of myself and become ___ of my parents.

7. We would naturally ___ firecrackers and red lanterns with the Chinese Spring Festival.

8. The scientist ___ when asked by a student to explain his theory in a few words.

9. She made a cup of coffee to ___ herself and then went on with her paperwork.

10. With the sharp rise of traffic accidents, it is necessary to ___ the public on traffic rules. Anwser: 1. features 2. denied 3. appeal 4. usage 5. bet

6. independent

7. associate

8. was stumped

9. refresh 10. educate

the form where necessary.

1. Let's stop arguing ____ arguing; we have to find a solution to the problem.

2. It's too late today. Let's call it a day and ____ the discussion again tomorrow.

3. The thesis is no easy work; you have to ____ over it for months.

4. College students are expected to equip themselves with necessary knowledge and skills before they ___ society.

5. Please turn to page 46; that's where we ___ last time.

Anwser: 1. for the sake of 2. pick up 3. break your back 4. get at 5. left off

15. Translate the following sentences into English.

1. 他饮酒过量，对身体不好。(more ... than ...)

He drinks more wine than is good for his health.

2. 他知道这时父母亲都在急切地等着他回家过年。(to wait for ... to)

He knew that at this moment his parents were eagerly waiting for him to return home for the New Y ear.

3. 招我们喜欢的不仅是他的聪明，还有他的幽默。(to appeal to)

What appeals to us is not only his intelligence but also his sense of humor.

4. 这位国际知名导演拍摄的最新影片结果是彻底的失败。(to turn out)

The latest movie made by that internationally famous director turned out to be a total failure.

5. 有些年轻人似乎对一切事情都缺乏耐心。(to have patience with)

It seems that some youngsters don't have patience with anything.

Unit 6Travel Around the World

Listen and Talk

Lead in

I often find myself trying to explain the attraction traveling 1) me. Traveling, according to many people, is often 2) and even, at least sometimes, dangerous. But one benefit of traveling is that it creates a perfect atmosphere for the 3) , an environment that can lead to better understanding and enlightenment. Many wonderful people and places lie 4) . The fact that there are obstacles as well only makes the journey 5) . My life and my memories will be enriched after encountering these people and places. That's a pretty big benefit!

Of course I could also enrich my life without traveling very far at all, but there is something about foreign lands that provides 6) . I think most non-travelers are simply too distracted by

when I'm on the road and therefore, more alive. I talk to more people and listen to them carefully. I keenly notice everything about my strange new environment. I see a lot of humor that can compensate for the misery of 8) .

Key: 1. holds for 2. uncomfortable 3. observation of life 4. on the road ahead

5. more rewarding

6. an additional fascination

7. their full attention

8. moving about Passage A: The Woman Taxi Driver In Cairo

2. Answer the following questions with the information from the passage.

1) How did the author feel upon her first arrival in Cairo?

She felt quite at a loss and a little helpless, as there was nobody to meet her at the airport, and she was facing a completely new world.

2) Why did Nagat take two jobs at the same time?

Because her husband died 10 years ago so she had to work hard to support her two children and parents.

3) What was Nagat's working style?

She is self-confident and works independently and effectively.

4) Why is Nagat a "true exception" in Cairo?

Because Nagat seems to be the only female taxi driver there. What is more, she insists on relying on herself and shouldering the heavy family burden alone.

5) What is your impression of Nagat?

Open

3. Choose the best answer to each question with the information from the passage.

1. The author followed Nagat, a woman taxi driver out of the airport because ________.

A) Nagat was the only female taxi driver there

B) Nagat forced her to do so

C) she instinctively felt she should trust Nagat

D) she had no other choice but to go with Nagat

2. The author enjoyed Nagat's company for all the following reasons except that ________.

A) she had a very good sense of directions

B) she was always punctual

C) she was able to understand human nature

D) she asked for low fares

3. It can be inferred from the passage that ________.

A) it was difficult for the author to hire a taxi in Cairo

B) it was unusual for a woman to work as a taxi driver in Cairo

C) Nagat often got offers of help from her male colleagues

D) Nagat also worked as an office secretary

4. In the author's eyes, Nagat was ________.

A) capable and independent

C) competitive and aggressive

D) attractive and appealing

5. In the passage, the author tries to tell us ________.

A) her impression of Islamic architecture

B) her impression of Cairo

C) her appreciation of the dignity of a woman

D) her friendship with a woman taxi driver

Anwser: 1.C, 2.D, 3.B, 4.A, 5.C

4.Fill in each of the blanks with an appropriate word.

Arriving alone in a new city late at night can be a difficult e____and even more so if it is in a foreign country with a foreign c___. Here the writer, herself a woman, remembers her luck in meeting Nagat, one of the few w___taxi drivers in Cairo. During her s___in the city, Nagat became her driver and guide taking her to visit many of the i___sights such as mosques, museums and the p___Along the way the writer was deeply i___by Nagat’s friendliness, determination, effectiveness and i___

Anwser: 1.experience 2.culture 3.women 4.stay 5.impressive

6.pyramids

7.impressed

8.independence

5. Study the meanings of the prefixes listed in the table, and then fill in each blank in the sentences that follow with the word given in brackets by adding an appropriate prefix to it. Prefix Meaning Example

counter- opposing, corresponding counteract, counterpart

inter- between, among interconnected, interrelated, international

out- outside beyond, more than outskirts outlive, outgrow

over- too much overcook, overact

under- too little underpay, underestimate

1.An country does not have modern industries and usually has a low standard of living. (developed)

2.The southern city soon became as waves of people rushed to it from all parts of the country. (populated)

3.He managed to his fear of the darkness when he walked in the deserted street late at night. (grow)

4.Energy, population and environment are issues in rural development in Southeast Asia. (related)

5. Virtually every character in the movie has a real life . (part)

Anwser: 1.underdeveloped 2.overpopulated 3.outgrow 4.interrelated 5.counterpart 6. Fill in the blanks with the words given below. Change the form where necessary.

approach core counterpart economy efficient

exception invite relief punctually vague

1. The mayor is scheduled to meet his American ___ during his 7-day visit to San Francisco.

one.

3. I felt great ____ when I heard I had passed the examination.

4. The regulations are so ____ that they lead to misinterpretation.

5. Chinese and mathematics have always been the ____ subjects in primary and secondary schools in China.

6. Y ou are expected to get to the interview ____ or a few minutes early.

7. Getting tired of her partner's all-talk-no-action ___ , she decided to take the action all by herself.

8. For the purpose of ____ , Mary decided to take lunch box to work every day.

9. Y ou could not be exempted from the punishment because there can be no ____ to the rule.

10. Strife at home would ____ dangers from abroad.

Anwser: 1. counterpart 2. efficient 3. relief 4. vague 5. core

6. punctually

7. approach

8. economy

9. exception 10. invite

7. Complete the following sentences with phrases or expressions from the passage. Make changes where necessary.

1. We hope the special loan from the bank will ___ our company ____ the crisis.

2. It is believed that the car the police found at the parking lot of the airport terminal ___ the gunman.

3. He founded the company five years ago and has been managing the business ___ .

4. The five candidates will speak ___ to introduce themselves to the voters.

5. At the wedding party, guests ___ with cocktails in hand, talking and laughing.

Anwser: 1. pull … through 2. belongs to 3. ever since 4. in turn 5. milled about

8. Translate the following sentences into English.

1. 他悲叹一声，对我们说他年轻时也曾风光一时。(to breathe a sigh of / to have seen a better day)

He breathed/heaved a sigh of sorrow and told us that he had seen a better day when he was young. 2. 他有极强的责任感，这就是为什么他被选中掌管这个项目。(to take control of)

He has a strong sense of responsibility, and that's why he is chosen to take control of the project. 3. 不管你去哪里，不管是出差还是去玩，尽量多了解那个地方总是一个不错的主意。(be it ... or ...)

Wherever you go, be it for business or pleasure, it is always a good idea to find out as much as you can about the place.

4. 我们得小心一点，同样的情景可能就要出现。(to be about / to repeat)

Let's be careful. The situation may be about to repeat itself.

5. 事实上，室内空气质量与儿童的健康密切相关，当然与成人的健康也有关系。(for that matter) In fact, indoor air quality has a great deal to do with children's health, and adult's health for that matter.

9. First notice the italicized structural similarities between the choice sentences and their simulated reproductions, and then do the simulated translation of the Chinese sentences.

1.Do you know what it is like to arrive in a strange city in the middle of the night?

你知道站在台上，所有的眼睛都看着你是一种什么感受吗？

2.I breathe a sigh of relief when she puts my bag into the trunk, locks it and gets behind the wheel.

She breathed a sigh of relief when she heard nothing serious happened to her son.

听到人质已被安然无恙地营救出来的消息，我们大家才松了一口气。

3.With a mild sense of humor around a deep core of understanding of human nature, Nagat takes control of my sightseeing schedule.

With 51% of the stock, the international corporation takes control of the board of the joint-venture. 凭着他在金融方面的专业知识和管理技能，他很快就控制住了局面。

4.What becomes clear to me soon as she drives me from museum to pyramid, from one part of town to the opposite, is this : she is a true exception here.

What became clear to the police was this : the murderer had a key to the house.

最后我终于明白了这一点：实际上他们对问题的解决并不感兴趣。

5.Wherever we stop, be it for a cup of tea during a break or upon arriving at an historical site, she is being noticed.

Whatever the season is, be it in hot summer or in chilly winter, he would always wear a blue jacket. 他每次出门，无论是出差还是旅游，总是随身带着笔记本电脑。

1. Do you know what it is like to stand on a stage with all eyes on you?

2. We all breathed a sigh of relief when news came that the hostage was rescued unharmed.

3.With his professional knowledge in finance and skills in management, he quickly took control of the situation.

4. What became clear to me finally was this: they were not actually interested in the solution of the problem.

5. Wherever he travels, be it a business trip or a sightseeing tour, he would always take a notebook PC with him.

Passage B: A Russian Experience

12. Choose the best answer to each question with the information from the passage.

1. According to the author, the attraction of St. Petersburg to tourists is mainly its ________.

A) elegant buildings

B) cultural history

C) street entertainers

D) wonderful food

2. The author believes the significance of traveling lies in ________.

A) seeing the wonderful world with its attractions

B) understanding people and sharing their life experiences

C) appreciating the culture and history of a strange land

D) making friends with people from all walks of life

3. St. Petersburg reminded the author of Paris, Amsterdam and V enice because ________.

A) it was also a city with a crisscross network of canals

C) various styles of architecture in those places could be found in St. Petersburg

D) it also ranked among the most beautiful cities in Europe

4. The author appreciates the Russians?positive attitudes towards life as ________.

A) they are all friendly to foreign visitors

B) they always treat their guests with great courtesy

C) they love to exchange opinions on arts and literature

D) they have the ability to handle whatever circumstances they are in

5. It can be inferred from the passage that ________.

A) the author could speak Russian, a little awkwardly though

B) it is popular to learn Russian in English-speaking countries

C) not many people in the author's country are interested in Russian

D) English-speaking people never care to learn a foreign language

Anwser: 1.B, 2.B, 3.A, 4.D, 5.C

13. Fill in the blanks with the words given below. Change the form where necessary.

ability absorb beloved convert intense

manner positive shelter stretch toast

1. Our new campus, which __ ten kilometers on the outskirts, is much bigger than the old one.

2. Facing ___ pressure to resign, the manager had to quit his job.

3. Hemingway is one of the most ___ and world-renowned American writers.

4. The practical experience will help to cultivate in students a true ___ to solve problems.

5. With the exception of a few ___ and acceptable reforms, the project is a failure as a whole.

6. What we are doing is to bridge the gap between the scientists and the market, ___ their research achievements into commercial products.

7. If we sit down and study it in a rational, objective ___ , maybe we could find a way out.

8. At the beginning of the dinner, he stood up and proposed a ___ in his heavily accented English.

9. Bill was so ___ in the football match on TV that he totally forgot his afternoon class.

10. After China's entry into the WTO, the country's industry will no longer ___ from foreign competition.

Anwser: 1. stretches 2. intense 3. beloved 4. ability 5. positive

6. converting

7. manner

8. toast

9. absorbed 10. be shelter

14. Complete the following sentences with phrases or expressions from the passage. Change the form where necessary.

1. Everyone was ___ at the party, singing and dancing, drinking and talking.

2. More students will be accepted to colleges and universities this year ___ the continuing expansion of college enrolment.

3. Old houses have been pulled down to ___ greenery.

4. The project group ___ two academic researchers, one lab assistant and a secretary.

5. An advertiser should know ___ the customers ___ and what factors influence their buying decisions.

15. Translate the following sentences into English.

1. 为什么人们要在旅行上花费这么多的时间和金钱呢？(Why is it that ...)

Why is it that people spend so much time and money on traveling?

2. 乘飞机旅行既快又安全，难怪是旅行者的首选。(no wonder / a popular choice)

Traveling by air is quick and safe. No wonder it is a popular choice for travelers.

3. 我们学校的大部分学生都选了网页设计这门课，计算机中心里白天晚上都挤满了人。(to enroll, to fill with)

Most of the students in my collage have enrolled in the course of web page design and the computer center is always filled with people day and night.

4. 我一直梦想着朋友遍天下。多亏了网络，我的梦想终于实现了。(thanks to)

It has always been my dream to have friends all over the world. Thanks to the Internet, my dream has come true.

5. 网上免费的信息，方便的交流，诱人的游戏，对于他这就是互联网的一切。(What ... is all about)

Free information on-line, convenient communication with friends, attractive games, this is what the Internet is all about.

Unit 7Drug Abuse

Listen and Talk

Lead in

1) the drug, many people report feelings like happiness, confidence, or peace when they take drugs. But even when they're feeling these things, there's a sense that 2) , that the happiness is going to disappear any moment. And 3) , in most cases these feelings are followed by depression, anxiety, guilt, embarrassment, loneliness and a yearning for more drugs.

Generally, drugs 4) the nervous system's basic functions. Sometimes they alter the muscles and how they function too. Besides, almost all drugs can make it tougher to sleep. Some drugs can cause immediate death, and some can give even healthy people a heart attack 5) . Using drugs over and over for a long period of time can cause lots of medical problems, from lung cancer to liver problems to 6) .

7) the physical problems, drugs cause major long-term brain issues. Depression is a serious problem for many addicts. Also, they can really hurt people. Drug addicts almost without exception start to tell lies, steal money for drugs, sometimes even get 8) they love. Their biggest ambition becomes getting high, instead of setting high goals.

Key:1. Depending on 2. it's not real 3. unfortunately 4. interfere with

5. on the spot

6. brain damage

7. In addition to

8. violent with people

Passage A: Agony from Ecstasy

2. Answer the following questions with the information from the passage.

She was a popular kid that everyone liked.

2) What did the author think of Ecstasy when she did it for the first time?

She thought that it couldn't be harmful/bad.

3) Why didn't the author stop using Ecstasy when she began to have paranoia?

Because she thought that it was normal.

4) What was the worst damage Ecstasy caused to her according to the author?

It took away her sanity.

5) What can we learn from the story of "Agony from Ecstasy"?

Open.

3. Choose the best answer to each question with the information from the passage.

1. What does the author mean by saying "They were never a question" in Paragraph 2?

A) Drugs were easily available to her at the time.

B) Drugs were in ready supply when she got ill.

C) Drugs were a normal part of her life at the time.

D) D) Drugs never came into her life when she was a child.

2. Why did the author begin to use drugs?

A) Because she felt sick in a completely different environment.

B) Because she was forced to by her new friends in New Y ork.

C) Because she was curious and wanted to have a try.

D) Because she wanted to have a closer tie with her new friends.

3. How did the author feel when she did Ecstasy for the first time?

A) Utterly frightened.

B) Totally fascinated.

C) Completely shocked.

D) Slightly disgusted.

4. When the author says toward the end of the passage "Since I saw that scan, my life has been an uphill crawl", she means that ________.

A) she has again set up a high goal for her life

B) she has determined to pursue an acting career

C) she has started a life which will be very difficult to keep up

D) she has realized that her life was in ruins

5. The last sentence of this passage suggests that ________.

A) many drug abusers never had the opportunity to return to normal

B) drug abusers can get rid of the bad habit

C) the author has let a second chance pass by

D) the author has taken up Ecstasy once again

Anwser: 1.D, 2.D, 3.B, 4.C, 5.A

4.Fill in each of the blanks with an appropriate word.

大学英语第一册课后习题答案

新视野大学英语（第二版）第一册Unit 1 III. 1. rewarding 2. communicate 3. access 4. embarrassing 5. positive 6. commitment 7.virtual 8. benefits 9. minimum 10. opportunities IV. 1. up 2. into 3. from 4. with 5. to 6. up 7. of 8. in 9. for 10.with V. 1.G 2.B 3.E 4.I 5.H 6.K 7.M 8.O 9.F 10.C Sentence Structure VI. 1. Universities in the east are better equipped, while those in the west are relatively poor. 2. Allan Clark kept talking the price up, while Wilkinson kept knocking it down. 3. The husband spent all his money drinking, while his wife saved all hers for the family. 4. Some guests spoke pleasantly and behaved politely, while others wee insulting and impolite. 5. Outwardly Sara was friendly towards all those concerned, while inwardly she was angry. VII. 1. Not only did Mr. Smith learn the Chinese language, but he also bridged the gap between his culture and ours. 2. Not only did we learn the technology through the online course, but we also learned to communicate with friends in English. 3. Not only did we lose all our money, but we also came close to losing our lives. 4. Not only do the workers want a pay increase, but they also want reduced working hours. 5. Not only is the house expensive, but it is also too far away from my company. Translation VIII. 1. Not only can students choose when and where to learn for an online course, but they can also take time to think through answers before making a reply. 2. She is excited by the idea of online learning while be considers it meaningless and useless. 3. Communicating with native English speakers is a very rewarding experience from which we can learn a lot. 4. Today, more and more people have access to the Internet through which they look for the information they need. 5. He wants her to give up working and stay home to look after the children. She feels, however, that this is too much for her. 6. Now that we have finished the course, we shall start doing more revision work. IX. 1. 我永远都不会忘记那位老师，是他告诉我学外语是有趣的、有价值的。如果没有他，我的英语说得不会像现在这样好。

大学英语三课后习题翻译及答案

Unit 1 From her accent I guess she’s from the Northeast. 从她的口音我猜她是来自东北地区的。 It was very clever of her to turn his argument against himself. 她很聪明，使他对自己的论点 I found a couple of shoes under the bed but they don’t make a pair. 我在床下发现了一双鞋，但他们不做一双 4. Dr. Bright always takes his time as he examines his patients and treats them with extreme care. Bright博士总是把他的时间用于他检查他的病人，并把他们的极端护理 5. British companies are trying to avoid the fate their American counterparts have already suffered. 英国公司正试图避免他们的美国同行已经遭受的命运。 6. Wilfred’s remarks confirmed me in my opinion that he was an honorable young man. 威尔弗雷德的话证实了我在我看来，他是一个光荣的年轻人 7. The key witness for the prosecution was offered police protection after she received death threats. 检察机关的主要证人在收到死亡威胁后提供了警方的保护 8. I thought that was the end of the matter but subsequent events proved me wrong. 我认为这是事情的结束，但随后的事件证明我错了。 9. Having practiced for so long, the New York baseball team stands a chance winning the World Series this year. 经过这么长时间的练习，纽约棒球队赢得了今年的世界系列赛的机会。 10. At the trial , Bob’s teacher, who was called as a character witness, said he was a quiet boy who had never been in trouble before. 在审讯中，鲍伯的老师，被称为证人，说他是个安静的男孩以前从未惹过麻烦。 Unit 2 11. We’ve just had a very fruitful meeting with the management and we’re now much more hopeful about the pay rise. 我们刚刚与管理层有了一个非常富有成效的会议，我们现在对加薪的希望更大了 12. The book I’m reading explains the evolution of plant and animal life on earth. 我读的这本书解释了地球上动植物的进化

大学英语三课后答案

Vocabulary 2 : an effort to feel better , I started to make small changes in my life and cut down /back from 20 cigarettes in day to a mere three or four. 为了感觉更好，我开始做一些小小的改变在我的生活中，以及减少从每天20支香烟到大约只有三或四。 I wasted electricity as you do at home , my dad would make me pick up the bill.如果我像你一样浪费在家浪费电的话，我的爸爸将肯定会让我支付账单（自己买单）。 can get by with four computers at the moment , but we’ll need a couple more when the new staff arrive. 这个时候我们还有四台电脑尚可（通过），但是我们需要两台以上的电脑，当新的职工来的时候。 is impossible to get through this course just by working hard around exam times .这是不可能通过这门课程的，单单只是考前临时抱佛脚的话。 they quickly face up to their mistakes , the will miss a unique opportunity to settle the problem once and for all. 除非他们很快面对自己的错误，否则就会失去一个独一无二的机会来解决这个问题一劳永逸。 students were instructed to do the experiment carefully and to turn in their reports at the beginning of next week. 学生被指示做实验仔细，为了上交他们的报告在下星期初。 did not travel much when I was younger , but I’m certainly making up for lost time now. 在我年幼的时候我不太去旅行，但我现在一定要弥补失去的时间。 people are the ones who think up things for the rest of the world to keep busy at. 成功的人就是那些思考这世界还剩下什么东西，并且为此保持忙碌。 Unit 2 Vocabulary 1 :

数据库系统基础教程(第二版)课后习题答案

Database Systems: The Complete Book Solutions for Chapter 2 Solutions for Section 2.1 Exercise 2.1.1 The E/R Diagram. Exercise 2.1.8(a) The E/R Diagram Kobvxybz Solutions for Section 2.2 Exercise 2.2.1 The Addresses entity set is nothing but a single address, so we would prefer to make address an attribute of Customers. Were the bank to record several addresses for a customer, then it might make sense to have an Addresses entity set and make Lives-at a many-many relationship. The Acct-Sets entity set is useless. Each customer has a unique account set containing his or her accounts. However, relating customers directly to their accounts in a many-many relationship conveys the same information and eliminates the account-set concept altogether. Solutions for Section 2.3 Exercise 2.3.1(a) Keys ssNo and number are appropriate for Customers and Accounts, respectively. Also, we think it does not make sense for an account to be related to zero customers, so we should round the edge connecting Owns to Customers. It does not seem inappropriate to have a customer with 0 accounts;

全新版大学英语第二版综合教程课后练习答案

最全的全新版大学英语第二版综合教程2答案课后练习答案 Unit1 Ways of Learning Part II Reading Task Comprehension Content Question Pair Work 1. They were studying arts education in Chinese kindergartens and elementary schools in Nanjing. 2. Their 18-month-old son Benjamin was fond of trying to place the key into the slot of the key box during their stay at the Jinling Hotel. 3. They would come over to watch Benjamin and then try to teach him how to do it properly. 4. Because he realized that this anecdote was directly relevant to their assigned tasks in China: to investigate early childhood education and to throw light on Chinese attitudes toward creativity. 5. Most of them displayed the same attitude as the staff at the Jinling Hotel. 6. He emphasized that the most important thing is to teach the child that on can solve a problem effectively by oneself. 7. He means that this incident pointed to important differences in educational and artistic practices between China and the USA.

全新版大学英语3(第二版)综合教程学生用书课后习题答案

Vocabulary I. 1. 1)on balance 5)illustrated9)involved 2)resist 6)budget 10)economic 3)haul 7)lowering11)blasting 4)wicked 8)boundary12)just about 2. 1)cut back/ down2)pick up 3)get by 4)get through 5)face up to 6)turn in 7)making up for8)think up 3. 1) pursued his mathematical studies and taught himself astronomy 2) often generate misleading thoughts 3) attach great importance to combining theory with practice in our work 4) be suspected of doing everything for money 5) before he gets through life 4. 1) their indoor, a profit, to invest in 2) device, the improvement, on a global scale 3) stacked, temptation, never dined out II Confusable Words 1. 1) house 2) Home 3) home, family 4) household 2. 1) doubt 2) suspect 3) doubted 4) suspected 5) suspect III. Word Formation 1)rise2)final3)regular4)cash5)hows, whys 6)upped7)yellowed8)bottled9)lower10)search Comprehensive Exercises I. Cloze 1. Text-related 1)get by2)temptation3)get through4)improvements 5)aside from6)suspect7)supplement8)profit

新视野大学英语3课后答案

新视野大学英语3课后答案新视野大学英语第二版读写教程第三册答案(1-7单元) Unit 1 III 1 beneath 2 disguised 3 whistles 4 restrain 5 grasp 6 longing 7 praying 8 faithful 9 pledge 10 drain IV 1 tell …on you 2 track down 3 work it out 4 picking on me 5 reckoned with 6 call on 7 on his own 8 get through 9 in disguise 10 revolves around V G O D I K L B F A N VI 1 advise 2 level 3 problems 4 necessity 5 skills 6 experience 7 solution 8 value 9 tool 10 manner VII 1 air-conditioned(装空调的;有冷气的) 2 handmade(手工制作的) 3 thunderstruck(非常吃惊的) 4 heartfelt(衷心的;诚挚的) 5 data-based(基于数据的) 6 self- employed(自主经营的) 7 custom-built(定制的;定做的) 8 weather-beaten(饱经风霜的) VIII

1. well-informed(对……非常熟悉的) 2 new-found(新获得的) 3 hard-earned(辛苦挣得的) 4 soft-spoken(说话温柔的) 5 newly-married(新婚的)6 widely-held(普遍认为的) 7 well-meant (出于好意的) 8 well-educated(受过良好教育的) IX 1 no matter how different it may seem form any other substance 2 no matter what a woman tries to do to improve her situation 3 no matter what excuse he gives 4 no matter what anyone else may think 5 no matter how they rewrite history X 1 just as we gained fame in victory we lost nothing in defeat 2 just as the head teacher plays a significant role in the school Jane plays a significant role f leader in the classroom. 3 whoever was out there obviously couldn’t se e him just as he couldn’t see them. 4 she has been searching all her life for the perfect chocolate just as I have been searching for the perfect beer. 5 you can make those kinds of comparisons just as you were doing the analyses a minute ago. XI

工程数学基础教程课后习题答案

工程数学基础习题解答

习题一 A

一、判断题 1.√；， 2.√； 3.×； 4.×； 5.×； 6.×； 7.×； 8.√； 9.√；10.×. 二、填空题 1.;C C A B 2.111(){1,2,3,4},(){,,},(){,,},(){1,4},(){2,3};f f a b e f A a b e f B f b --=====D R 3.满; 4.2sup = E ,3inf -=E ; 5.0; 6.0; 7. n ; 8.Y . B 1.证 ()y f A B ?∈?,x A B ?∈?使得)(x f y =.由x A B ∈?,得x A ∈,且x B ∈故()()y f x f A =∈且()y f B ∈,即()()y f A f B ∈?,因此()()()f A B f A f B ???. 当f 是单射时,只需证明()()()f A f B f A B ???即可： ()()(),y f A f B f ?∈??R f 由是单射知,(). (),(),1X y f x y f A y f B x ?=∈∈∈使得且 ,,()(),x A x B x A B y f x f A B ∴∈∈∈?=∈?且即从而故()()()f A f B f A B ???. 是可能的，例如, 2:,[2, 0],[1, 3],[1, 0].f x x A B A B =-=-?=-取则()([1,0])[0, 1], f A B f ?=-=于是而 [][]()()0, 4[0, 9]0, 4.f A f B ?=?=从而有 . 2. 证（1）n ?∈,有)2 ,2(12 ,12][-?-+-n n ,故 ∞ =-?-+-1)2 ,2(12 12][n n ,n . 另一方面,)2 ,2(-∈?x ,k ?∈ ,使][12 ,12k k x -+-∈,故 ∞ =-+-∈1 ][12 12n n ,n x ,于是 ? -)2 ,2( ∞ =-+-1 ][12 12n n ,n . 因此, ∞ =-+-= -1 ][12 ,12)2 ,2(n n n . （2）n ?∈,有)12 ,12(]2 ,2[n n +--?-,故 ∞ =+--?-1)12 ,12(]2 ,2[n n n . 另一方面,对任意]2 ,2[-?x ,即2>x ,k ?∈ ,使得212>+>k x ,即 )12 ,12(k k x +--?,从而 ∞ =+--?1)12 ,12(n n n x ，故 ∞ =-?+--1 ]2,2[)12 ,12(n n n .

大学英语课后练习答案

Unit 11. Vocabulary 1) insert 2) on occasion 3) investigate 4) In retrospect 5) initial 6) phenomena 7) attached 8) make up for 9) is awaiting 10) not …in the least 11) promote 12) emerged 2. Rewrite each sentence 1) There is a striking contrast between the standard of living in the north of the country and the south. 2) Natural fiber is said to be superior to synthetic fiber. 3) The city's importance as a financial center has evolved slowly. 4) His nationality is not relevant to whether he is a good lawyer. 5) The poems by a little-known sixteenth-century Italian poet have found their way into some English magazines. 3. 1) Chinese isn't a subject that can be picked up in a month. You can't accomplish your goal of mastering the language unless you work at it for years. Well, it sounds as if I'm exag-gerating the difficulties, but the fact is I'm only telling the truth. 2) The principal is somewhat disappointed with the performance of the children. From what she has gathered, some of the teaching staff have neglected their pupils. She has just announced that strict work regulations have been made and that they apply to both Chinese and overseas teachers. 3) The teacher-directed and the child-directed approaches to teaching art represent two ex-tremes of opinion. Too many teacher-directed activities cannot be expected to effectively assist children in learning because of the rigid structure. On the other hand, too many child-directed activities may see a curriculum that is totally unstructured and out of con-trol. There are valid reasons to believe a teacher-guided approach would be a superior way to guide children's development. This approach combines some form of structure with the child leading the direction. II. Confusable Words 1. 1) continual 3) continual

全新版大学英语(第二版)综合教程3习题答案(4-8)

全新版大学英语（第二版）综合教程3习题答案（4-8） Unit 5 Giving Thanks Text A Content Questions 1. He wrote them on a ship on the way to the island of Tulagi in the South Pacific on Thanksgiving Day, 1943. 2. Preparing a traditional Thanksgiving dinner featuring roast turkey made the writer extremely busy. 3. The writer was thinking about Thanksgiving. 4. He decided to write letters to show gratitude to those who had helped him in his life. 5. He had always accepted what they had done for him, but never expressed to any of them a simple “Thank you.” 6. He decided to write to his father, his grandmother, and the Rev. Lonual Nelson, his grammar school principal. 7. His father had impressed upon him from boyhood a love of books and reading. 8. He remembered that each morning Nelson would open the school with a prayer over his assembled students. 9. He recalled how his grandmother had taught him to tell the truth, to share, and to be forgiving and considerate of others. And he thanked her for her delicious food and for all the wonderful things she had done for him. 10. His reading of their letters left him not only astonished but also more humbled than before, because they all thanked him rather than saying they would forgive him for not having previously thanked them. 11. The writer learned that one should learn to express appreciation for others’ efforts. 12. The writer wished for all people the common sense to achieve world peace, and find the good and praise it. Text Organization 1. Parts Paragraphs Main Ideas Part One P aras. 1-9 On Thanksgiving Day 1943, as a young coastguardsman at sea, the writer came up with the idea of expressing his gratitude to people who had helped him before. Part Two P aras. 10-16 The writer wrote three thank-you letters to his father, the Rev. Nelson and his grandmother. Part Three Paras.17-23 The writer got three letters in reply. Part Four Paras. 24-26 The writer wishes everyone to find the good and praise it. 2 Correspondents Letters Sent Letters Received Father Thanks him for teaching the writer from boyhood to love books and reading. Tells the writer how he, as a teacher and a father as well, felt content with his own son. The Rev. Nelson Thanks him for his morning school prayers. i Tells the writer about his retirement coupled with self-doubt, and the re?assurance brought to him by the writer's letter. Grandmother T hanks her for teaching the writer how to tell the truth, to share and to be forgiving, and for

MATLAB基础教程薛山第二版课后习题答案讲解

《及应用》实验指导书《及应用》实验指导书班级： T1243-7 姓名：柏元强学号： 20120430724 总评成绩：汽车工程学院电测与汽车数字应用中心

目录实验04051001 语言基础..................... 错误!未指定书签。实验04051002 科学计算及绘图............. 1错误!未指定书签。实验04051003 综合实例编程.. (31)

实验04051001 语言基础 1实验目的 1) 熟悉的运行环境 2) 掌握的矩阵和数组的运算 3) 掌握符号表达式的创建 4) 熟悉符号方程的求解 2实验内容第二章 1. 创建的变量，并进行计算。 (1) 87，190，计算、、a*b 。 (87); (190); *b (2) 创建 8 类型的变量，数值与(1)中相同，进行相同的计算。 8(87); 8(190); *b 2．计算： (1) 操作成绩报告成绩

(2) e3 (3) (60) (3) (3*4) 3．设，，计算： (1) (2) (3) 23; (4*u*v)(v) (((u))^2)/(v^2) ((3*v))/(u*v) 4．计算如下表达式： (1) (2) (3-5*i)*(4+2*i) (2-8*i) 5．判断下面语句的运算结果。 (1) 4 < 20

(2) 4 <= 20 (3) 4 20 (4) 4 20 (5) 'b'<'B' 4 < 20 , 4 <= 20,4 20,4 20,'b'<'B' 6．设，，，，判断下面表达式的值。 (1) (2) (3) (4) (5) (6) 395837; a><>>> 7．编写脚本，计算上面第2题中的表达式。 ('(60)='); ((60)) ('(3)='); ((3)) ('(3*4)='); ((3*4)) 8．编写脚本，输出上面第6题中的表达式的值。395837;

大学英语3课后答案

第二版新视野大学英语读写教程第三册uni1答案 1. No matter how experienced a speaker you are, and how well you have prepared your speech, you will have difficulty making a speech at such a noisy reception. 2. Just as all his sister’s friends cared about him, Jimmy cared about them. 3. Car manufacturers stamp a vehicle identification number at several places on new cars to help track down stolen vehicles. 4. If you dare tell on me when the teacher gets back I won’t say a word to you any more. 5. Some elderly people prefer to live on their own while the great majority choose to live with their children. 6. Here is something that needs to be reckoned with: how to get the necessary finances to establish the company. 1. 每当有人帮了你，无论事情大小，无论他地位高低，你都应该对他说声“谢谢”。 2．蒸汽机的发明使船舶发生了变化，正如其已经改变了陆地运输一样。 3．尽管经理努力帮忙，他还是不能找到问题的根源所在。 4．这个女孩的生活天天围着哥哥转，完全明白该做什么来使哥哥高兴。 5．如果你不知道自己想要什么，你最终得到的可能都是自己不想要对。 6．吉米有他妹妹帮助他度过那些没有父亲的艰难日子。第二版新视野大学英语读写教程第三册unit2答案 1. The defendant, a woman of only 30, kept insisting on her own innocence. 2. All tings considered, dates, beans and some leafy green vegetables are the best sources of iron. 3. No beverages are served with meals because they interfere with digestion. 4. Taking the popularity of the region into consideration, it is advisable to book hotels in advance. 5. If you have a feeling of wanting to throw up after taking this drug, stop taking it immediately and consult your doctors as soon as possible. 6. Summing up the discussion, he said both parties should consider the most effective way to solve the problem. 1. 作为补救缺铁的一种方法，专家推荐食用肉、鸡和鱼，它们是最好的铁质来源，也是唯一最容易被身体吸收的铁质来源。 2．铁质储量为零时，你会觉得虚弱，疲乏无力，喘不过气，这是缺铁第三阶段的典型症状。 3. 耐力运动员，尤其是女性，经常会缺铁，如果增食肉类食物或服用铁质补剂，能够恢复到健康状态。 4．这位运动医学专家认为，感到劳累、工作效率差的人，最好食用牛肉、羊肉，它们含有最易被吸收的铁质。 5．铁质储量低的人应该去咨询医生，看看是否应通过调整饮食或服用铁质补剂来校正不足。 6．一般说来，如果你忽视自己摄入的铁质含量，不在铁质储备失去之前注意警告信号，你会有危险。第二版新视野大学英语读写教程第三册uni3答案

大学英语三(综合教程)第4567单元课后习题详细答案(含原文)

大学英语第一册课后习题答案

大学英语三课后习题翻译及答案

大学英语三课后答案

数据库系统基础教程(第二版)课后习题答案

全新版大学英语第二版综合教程课后练习答案

全新版大学英语3(第二版)综合教程学生用书课后习题答案

新视野大学英语3课后答案

工程数学基础教程课后习题答案

大学英语课后练习答案

最新全新版大学英语3课后习题及答案

全新版大学英语(第二版)综合教程3习题答案(4-8)

MATLAB基础教程薛山第二版课后习题答案讲解

大学英语3课后答案