文档库 最新最全的文档下载
当前位置:文档库 › 华南理工大学入学考试(英语)

华南理工大学入学考试(英语)

华南理工大学入学考试(英语)
华南理工大学入学考试(英语)

华南理工大学

大学英语分班试题库精选

College English Test For Freshmen

(仅供内部交流)

注意事项

1.请按座位表双隔位入座,将准考证(校园卡、学生卡)放在座位的左上角。

2.将自己的姓名、院系、班级写在客观题卡左上方的方框中,将学生代号填入答题卡右上方的方框中。具体填法如下:把学号中的前2位数字(20)去掉,然后将剩下的10位填入答题卡。如某学生的学号为200542019018,去掉“20”,将剩下的“0542019018”填入答题卡即可。最后在竖列的相对应的数字框中划线。

3.所有客观题(4选1)的答案一不定期要写在答题卡上。

4.听写/简答/填空/翻译题的答案写在主观题答题纸上。

5.凡是写在试题册的答案一律作废。

6.请严格按照题号答题划线。

7.考试结束待监考老师收齐试卷并清点完毕后方可离开教室。

8.请仔细阅读注意事项。

Model Test 1

Part One Listening Comprehension

Section A

Directions: In this section, you will hear 10 short conversations. At the end of each conversation, a question will be asked about what was said –Both the conversation and the question will be spoken only once. After each question there will be pause. During the pause, you must read the four choices marked A),B),C)and D), and decide which is the best answer. Then mark the corresponding letter on the Answer Sheet with a line through the centre.

Example: Y ou will hear:

Y ou will read:

A)At the office.

B)In the waiting room.

C) At the airport.

D)In a restaurant.

From the conversation we know that the two were talking about some work they had to finish in the evening. This is most likely to have taken place at the office. Therefore, A)At the office is the best answer. Y ou should choose

[A] on the Answer Sheet and mark it with a single line through the centre.

1. A)She is not interested in the article.

B)She has giver the man much trouble.

C)She would like to have a copy of the article.

D)She doesn’t want to take the trouble to read the article.

2.A)He saw the big tower he visited on TV.

B)He has visited the TV tower twice.

C)He has visited the TV tower once.

D)He will visit the TV tower in June.

3. A)The woman has trouble getting along with the professor.

B)The woman regrets having taken up much of the professor’s time.

C)The woman knows the professor has been busy.

D)The woman knows the professor has run into trouble.

4. A)He doesn’t enjoy business trips as much as he used to.

B)He doesn’t think he is capable of doing the job.

C)He thinks the pay is too low to support his family.

D)He wants to spend more time with his family.

5. A)The man thought the essay was easy.

B)The both had a hard time writing the essay.

C)The woman thought the essay was easy.

D)Neither of them has finished the assignment yet.

6. A)In the park. B)Between two buildings.

C)In his apartment D)Under a huge tree.

7. A)It’s awfully dull. B)It’s really exciting.

C)It’s very exhausting. D)It’s quite challenging.

8. A)Movie. B)A lecture. C)A play. D)A speech.

9. A)The weather is mild compared to the past years.

B)They are having the coldest winter ever.

C)The weather will soon get warmer.

D)The weather may get even colder.

10. A)The mystery story.

B)The hiring of a shop assistant.

C)The search for a reliable witness.

D)An unsolved case of robbery.

Section B

Passage One

Questions 11 to 14 are based on the passage you have just heard.

11. A)They want to change the way English is taught.

B)They learn English to find well-paid jobs.

C)They want to have an up-to-date knowledge of English.

D)They know clearly what they want to learn.

12. A)Professionals. B)College students.

C)Beginners D)Intermediate earners.

13. A)Courses for doctors. B)Courses for businessmen.

C)Courses for reporters. D)Courses for lawyers.

14. A)Three groups of learners. B)The importance of business English.

C)English for Specific Purposes. D)Features of English for different papacies. Passage Two

Questions 15 to 17 are based on the passage you have just heard.

15. A)To show off their wealth.

B)To feel good.

C)To regain their memory.

D)To be different from others.

16. A)To help solve their psychological problems.

B)To play games with them.

C)To send sham to the hospital.

D)To make them aware of its harmfulness.

17. A)They need care and affection.

B)They are fond of round-the-world trips.

C)They are mostly from broken families.

D)They are likely to commit crimes.

Passage Three

Questions 18 to 20 are based on the passage you have just heard.

18. A)Because it was too heavy.

B)Because it did not bend easily.

C)Because it did not shoot far.

D)Because its string was short.

19. A)It went out of use 300 years ago.

B)It was invented alter the short how.

C)It was discovered before fire and the wheel.

D)It’s still in use today.

20.A)They are accurate and easy to pull.

B)Their shooting range is 40 yards.

C)They are usually used indoors.

D)They took 100years to develop.

Part II Reading Comprehension (35 minutes)

Directions: There are 4 passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A),B),C) and D). Y ou should decide on the best choice and mark the corresponding letter on the Answer Sheet with a single line through the center.

Passage One

Questions 21 to 25 are based on the following passage.

Design of all the new tools and implements is based on careful experiments with electronic instruments. First, a human “guinea pig” is tested using a regular tool. Measurements are taken of the amount of work done, and the buildup of heat in the body. Twisted joints and stretched muscles can not perform as well, it has been found, as joints and muscles in their normal positions. The same person is then tested again, using a tool designed according to the suggestions made by Dr. Tichauer. All these tests have shown the great improvement of the new designs over the old.

One of the electronic instruments used by Dr. Tichauer, the myograph (肌动记器), makes visible through electrical signals the work done by human muscle.

Another machine measures any dangerous features of tools, thus proving information upon which to base a new design. One conclusion of tests made with this machine is that a tripod stepladder is more stable and safer to use than one with four legs.

This work has attracted the attention of efficiency experts and time-and-motion-study engineer, but its value goes far beyond that. Dr. Tichauer’s first thought is for the health of the tool user. With the repeated use of the same tool all day long on production lines and in other jobs, even light manual work can put a heavy stress on one small area of the body. In time, such stress can cause a disabling disease. Furthermore, muscle fatigue is a serious safety hazard.

Efficiency is the by-product of comfort, Dr. Tichauer believes, and his new designs for traditional tools have proved his point.

21.What are involved in the design of a new tool according to the passage?

A)Electronic instruments and a regular tool.

B)A human “guinea pig ” and a regular tool.

C)Electronic instruments and a human “guinea pig”.

D)Electronic instruments, a human “guinea pig” and a regular tool.

22.From the passage we know that joints and muscles perform best when .

A)they are twisted and stretched

B)they are in their normal positions

C)they are tested with a human “guinea pig”

D)they are tested with electronic instruments

23.A“myograph” (Para. 2, Line 1) is an electronic instrument that .

A)is able to design new tools

B)measures the amount of energy used

C)enable people to see the muscular movements

D)visualizes electrical signals

24.It can be inferred form the passage that .

A)a stepladder used to have four legs

B)it is dangerous to use tools

C)a tripod is safer in a tool design

D)workers are safer on production lines

25.Dr. Tichauer started his experiments initially to .

A)improve efficiency

B)increase production

C)reduce work load

D)improve comfort

Questions 26 to 30 are based on the following passage.

More and more , the operations of our businesses, governments, and financial institutions are controlled by information that exists only inside computer memories. Anyone clever enough to modify this information for his own purposes can reap big reward. Even worse, a number of people who have done this and been caught at it have managed to get away without punishment.

It’s easy for computer crimes to go undetected if no one checks up on what the computer is doing.

But even if the crime is detected, the criminal may walk away not only unpunished but with a glowing recommendation from his former employers.

Of course, we have no statistics on crimes that go undetected. But it’s disturbing to note how many of the crimes we do know about were detected by accident, not by systematic inspections or other security procedures. The computer criminals who have been caught may have been the victims of uncommonly bad luck.

Unlike other lawbreakers, who must leave the country, commit suicide, or go to jail, computer criminals sometimes escape punishment, demanding not only that they not be charged but that they be given good recommendations and perhaps other benefits. All too often, their demands have been met.

Why? Because company executives are afraid of the bad publicity that would result if the public found out that their computer had been misused. They hesitate at the thought of a criminal boasting in open court of how he juggled (诈骗) the most confidential (保密) records right under the noses of the company’s executives, accountants, and security staff. And so another computer criminal departs with just the recommendations he needs to continue his crimes elsewhere.

26.It can be concluded from the passage that .

A)it is still impossible to detect computer crimes today

B)people commit computer crimes at the request of their company

C)computer criminals escape punishment because they can’t be detected

D)computer crimes are the most serious problem in the operation of financial institutions

27.It is implied in the third paragraph that .

A)most computer criminals who are caught blame their bad luck

B)the rapid increase of computer crimes is a troublesome problem

C)most computer criminals are smart enough to cover up their crimes

D)many more computer crimes go undetected that are discovered

28.Which of the following statements is mentioned in the passage?

A)A strict law against computer crimes must be enforced.

B)Companies usually hesitate to uncover computer crimes to protect their reputation.

C)Companies will guard against computer crimes to protect their reputation.

D)Companies need to impose restrictions on confidential information.

29.What may happen to computer criminals once they are caught?

A)With a bad reputation they can hardly find another job.

B)They may walk away and easily find another job.

C)They will be denied access to confidential records.

D)They must leave the country to go to jail.

30.The passage is mainly about .

A)why computer criminals are often able go escape punishment

B)why computer crimes are difficult to detect by systematic inspections

C)how computer criminals manage to get good recommendations from their former employers

D)why computer crimes can’t be eliminated

Questions 31 to 35 are based on the following passage.

In a family where the roles of men and women are not sharply separated and where many household tasks are shared to a greater or lesser extent, notions of male superiority are hard to maintain. The pattern of sharing in tasks and indecision makes for equality and this in turn leads to further sharing. In such a home, the growing boy and girl learn to accept equality more easily than did their parents and to prepare more fully for participation in a world characterized by cooperation rather than by the “battle of the sexes”.

If the process goes too far and man’s role is regarded as less important – and that has happened in some cases – we are as badly off as before, only in reverse.

It is time to reassess the role of the man in the man in the American family. We are getting a little tired of “Momism”– but we don’t want to exchange it for a “neo-Popism”. What we need, rather, is the recognition that bringing up children involves a partnership of equals. There are signs that psychiatrists, psychologists, social workers, and specialists on the family are becoming more aware of the part men play and that they have decided that women should not receive all the credit – nor the blame. We have almost given up saying that a woman’s place is in the home. We are beginning, however, to analyze man’s place in the home and to insist that he does have a place in it. Nor is that place irrelevant to the healthy development of the child.

The family is a co-operative enterprise for which it is difficult to lay down rules, because each family needs to work out its own ways for solving its own problems.

Excessive authoritarianism (命令主义) has unhappy consequences, whether it wears skirts or trousers, and the ideal of equal rights and equal responsibilities is pertinent (相关的, 切题的) not only to a healthy democracy, but also to a healthy family.

31.The ideal of equal rights and equal responsibilities is .

A)fundament to a sound democracy

B)not pertinent to healthy family life

C)responsible for Momism

D)what we have almost given up

32.The danger in the sharing of household tasks by the mother and the father is that .

A)the role of the father may become an inferior one

B)the role of the mother may become an inferior one

C)the children will grow up believing that life is a battle of sexes

D)sharing leads to constant arguing

33.The author states that bringing up children .

A)is mainly the mother’s job

B)belongs among the duties of the father

C)is the job of schools and churches

D)involves a partnership of equals

34.According to the author, the father’s role in the home is .

A)minor because he is an ineffectual parent

B)irrelevant to the healthy development of the child

C)pertinent to the healthy development of the child

D)identical to the role of the child’s mother

35.With which of the following statements would the author be most likely to agree?

A)A healthy, co-operative family is a basic ingredient of a healthy society.

B)Men are basically opposed to sharing household chores.

C)Division of household responsibilities is workable only in theory.

D)A woman’s place in the home – now as always.

Questions 36 to 40 are based on the following passage.

Teaching children to read well from the start is the most important task of elementary schools. But relying on educators to approach this task correctly can be a great mistake. Many schools continue to employ instructional methods that have been proven ineffective. The staying power of the “look-say”or “whole-word”method of teaching beginning reading is perhaps the most flagrant example of this failure to instruct effectively.

The whole-word approach to reading stresses the meaning of words over the meaning of letters, thinking over decoding, developing a sight vocabulary of familiar words over developing the ability to unlock the pronunciation of unfamiliar words. It fits in with the self-directed, “learning how to learn” activities recommended by advocates (倡导者) of “open” classrooms and with the concept that children have to be developmentally ready to begin reading. Before 1963, no major publisher put out anything but these “Run-Spot-Run” readers.

However, in 1955, Rudolf Flesch touched off what has been called “the great debate”in beginning reading. In his best-seller Why Johnny Can’t Read, Flesch indicted (控诉) the nation’s public schools for miseducating students by using the look-say method. He said-and more scholarly studies by Jeane Chall and Rovert Dykstra Later confirmed – that another approach to beginning reading, founded on phonics (语言学) , is far superior.

Systematic phonics first teaches children to associate letters and letter combinations with sounds; it then teaches them how to blend these sounds together to make words. Rather than building up a relatively limited vocabulary of memorized words, if imparts a code by which the pronunciations of the vast majority of the most common words in the English language can be learned. Phonics does not devalue the importance of thinking about the meaning of words and sentences; it simply recognizes that decoding is the logical and necessary first step.

36.The author feels that counting on educators to teach reading correctly is .

A)only logical and natural B)the expected position

C)probably a mistake D)merely effective instruction

37.The author indicts the look-say reading approach because .

A)it overlooks decoding B)Rudolf Flesch agrees with him

C)he says it is boring D)many schools continue to use this method

38.One major difference between the look-say method of learning reading and the phonics method is .

A)look-say is simpler B)phonics takes longer to learn

C)look-say is easier to teach D)phonics gives readers access to far more words

39.The phrase “touch-off” (Para.3, Line 1) most probably means .

A)talk about shortly B)start or cause

C)compare with D)oppose

40.According to the author, which of the following statements is true?

A)Phonics approach regards whole-word method as unimportant.

B)The whole-word approach emphasizes decoding.

C)In phonics approach, it is necessary and logical to employ decoding.

D)Phonics is superior because it stresses the meaning of words thus the vast majority of most common words can be learned.

Part Three V ocabulary and Structure

Directions: There are 30 incomplete sentences in this part. For each sentence there are four choices marked A),B),C) and D). Choose the ONE answer that best completes the sentence. Then mark the corresponding letter on the Answer Sheet with a single line through the center.

41.Word had come from the manager a new transaction would be concluded.

A)who

B)that

C)which

D)when

42.There was a traffic jam, but she get to the destination in time.

A)could

B)might

C)ought to

D)was able to

43.“Do you think I should attend the lecture?” she asked me.

A)that

B)whether

C)if

D)when

44.Their room was on the third floor, its window the sports ground.

A)overlooks

B)overlooking

C)overlooked

D)to overlook

45.On no account to anyone who works in the company.

A)my name must be mentioned

B)my name must mention

C)must my name be mentioned

D)must my name mention

46.Jim knows little of mathematics, of chemistry.

A)and still less

B)as well as

C)no less than

D)and still more

47.The man denied any thing at the supermarket when he was questioned by the police.

A)to have stolen

B)to steal

C)having stolen

D)having been stealing

48.Did he tell you what if he had a chance?

A)was he going to do

B)he would do

C)be had done

D)had to do

49.The results were to yesterday, but we have heard nothing.

A)reveal

B)have revealed

C)be revealed

D)have been revealed

50.Calculations, which are astronomically exact, have been made with the use of computers.

A)possible

B)it possible

C)possibly

D)to be possible

51.To handle the delicate situation, you must; be

A)more than careful

B)more carefully

C)carefully enough

D)enough carefully

52.The governess agreed to teach the temperamental child she was given complete authority.

A)whether

B)for

C)that

D)provided

53.According to the periodic table, still some elements undiscovered.

A)there seem to be

B)it seems to be

C)it seems that

D)here seem

54.The farmer used wood to build a house to store grain.

A)with

B)in which

C)which

D)where

55.A beam of light will not bend round the corners unless to do so with the help of a reflecting device.

A)being done

B)made

C)to be made

D)having made

56. , the more severe the winters are.

A)The more north you go

B)The farther you go the north

C)The more you go north

D)The farther north you go

57.Vicky has been sad recently, for her plan to go to college at the last moment.

A)fell out

B)fell behind

C)fell through

D)fell off

58.Y ou had better leasing these newcomers, for that will hurt their feeling.

A)leave out

B)leave for

C)leave off

D)leave behind

59.Don’t lose heart! Y ou should your courage and overcome the difficulty.

A)hold up

B)set up

C)pull up

D)pluck up

60.He a sum of money every month to help the two orphans.

A)sets aside

B)sets up

C)sets along

D)sets in

61.His debts had to be after he committed suicide with his rifle.

A)laid off

B)written off

C)turned off

D)put off

62.The gentleman a cherub with his letter.

A)combined

B)included

C)kept

D)enclosed

63.At the meeting both sides exchanged their views on a wide of topics they were interested in.

A)extent

B)number

C)collection

D)range

64.His has changed but he has kept the fine qualities of a scientific researcher.

A)state

B)status

C)station

D)statue

65.She can speak French and German, to nothing of English.

A)say

B)speak

C)talk

D)tell

66.If you play with electricity, you may get an electric .

A)strike

B)beat

C)shock

D)knock

67.It was a wonderful play with a of over fifty actors and actresses.

A)list

B)group

C)bunch

D)herd

68.A change in policy is needed if relations are ever to improve.

A)strict

B)wide

C)ever

D)radical

69.Please give my best to your family.

A)notice

B)attention

C)regards

D)cares

70.They bought the land with a to build a new office block.

A)purpose

B)view

C)goal

D)reason

Part IV Close (15 minutes )

Directions: There are 20 blanks in the following passage, for each bland there are four choices marked A),B),C) and D) on the right side of the paper. Y ou should choose the one that best fits into the passage.

Then mark the corresponding letter on the Answer Sheet with a single line through the center.

Methods of studying vary; what works 71 for some students doesn’t work at all for others. The only thing you can do is experiment 72 you find a system that does work for you . But two things are sure: 73 else can do your studying for you, and unless you do find a system that works, you won’t although college. Meantime, there are a few rules that 74 for everybody. The hint is “don’t get 75 ”.

The problem of studying, 76 enough to start with, becomes almost 77 when you are trying to do 78 in one weekend. 79 the fastest readers have trouble 80 that. And id you are behind in written work that must be 81 , the teacher who accepts it 82 late will probably not give you good credit. Perhaps he may not accept it 83 . Getting behind in one class because you are spending so much time on another is really no 84 .Feeling pretty virtuous about the seven hours you spend on chemistry won’t 85 one bit if the history teacher pops a quiz. And many freshmen do get into trouble by spending too much time on one class at the 86 of the others, either because they like one class much better or because they find it so much harder that they think, they should 87 all their time to it. 88 the reason, going the whole work for one class and neglecting the rest of them is a mistake, if you face this 89 , begin with the shortest and easiest 90 . Get them out of the way and then go to the more difficult, time consuming work.

71.A)good B)easily C)sufficiently D)well

72.A)until B)after C)while D) so

73.A)somebody B)nobody C)everybody D)anybody

74.A)follow B)go C)operate D)work

75.A)behind B)after C)slow D)later

76.A)hardly B)unpleasant C)hard D)heavy

77.A)improbable B)necessary C)impossible D)inevitable

78.A)three week’s work B) three weeks’ works

C) three week s’ work D) three week’s works

79.A)Even B)Almost C)If D)With

80.A)to do B)doing C)at doing D)with doing

81.A)turned in B) turned up C) turned out D) given in

82.A)very B)quite C)such D)that

83.A)anyway B)either C)at all D)too

84.A)solution B)method C)answer D)excuse

85.A)help B)encourage C)assist D)improve

86.A)expense B)pay C)debt D)charge

87.A)devote B)put C)spend D)take

88.A)Whichever B)Whatever C)However D)Wherever

89.A)attraction B)decision C)temptation D)dilemma

90.A)arrangements B)way C)assignments D)class

Part V

Writing Directions: For this part, you are allowed thirty minutes to write a composition on the topic Good Manners. Y ou should write at least 100words and you should base your composition on the outline (giver in Chinese) below:

1.世界上的人都看重良好的行为举止.

2.在公共场合的一些好的行为举止.

3.如果每个人都培养起了好的行为举止.

Keys:

1-10:CCBDB DACDD 11-20:DABCB AACBA

21-25:DBCAD

26-30:DDBBD

31-35:AADCA

36-40:CADBC

41-50:BDABC ACBDA51-60:ADABB DCCDA61-70:BDDBA ABDCA

71-80:DABDA CCCAB 81-90:ADCDA AABCC

Writing:

People all over the world set great regard on good manners. To certain degree, good manners indicate a person’s good education and breeding. In schools, it is part of students’ moral Raining to develop good manners. A person with good manners always wins praise. On the contrary, people will frown on him if he behaves roughly and impolitely.

There are good manners in which we behave in public places. It is a good manner to offer help to the young, the old and the handicapped when they are in need of it. So is it to conduct ourselves politely and keep away from foul language. Besides, we should guard against such minor offences as making a loud noise, casting peels and shells, smoking and spitting.

If everyone has developed good manners, people will form a more harmonious relationship. If everyone behaves considerately towards others and follows the social ethics, people will live in a better world. With the general mood of society improved, there will be a progress of civilezation.

2018-华南理工大学网络教育大学语文B 随堂练习及答案

语文-随堂练习 第一章千古风骚 1.(单选题) 《诗经·采薇》是一首() A、征战诗 B、思妇诗 C、送别诗 D、爱情诗 参考答案:A 2.(单选题) 《楚辞》作为一部诗歌总集,为西汉时期的学者________所编。() A、屈原 B、宋玉 C、刘向 D、司马迁 参考答案:C 3.(单选题) 诗经最具代表性的章法结构是() A.重章叠句,一唱三叹 B.层层递进 C.首尾呼应 D.赋、比、兴 参考答案:A 4.(单选题) 屈原作品中带有自传性质的长篇抒情诗是() A、《九歌》 B、《天问》 C、《九章》 D、《离骚》 参考答案:D 5.(多选题) 《诗经》的三种表现手法是() A.风 B. 比 C. 雅 D.赋E.兴 参考答案:BDE 6.(判断题) 诗经又叫“诗三百”,它共收有西周中叶到东周的300首歌谣。() 参考答案:错 7.(判断题) 屈原是我国伟大的现实主义诗人,我国第一位有稽可考的诗人。() 参考答案:错 8.(判断题) 《短歌行》发出了时光短促、人生几何的慨叹,表现出曹操的精神状态是消极颓唐的。() 参考答案:错 9.(判断题) 《古诗十九首》是汉代无名氏的作品,且非一人一时所作,梁代萧统将其收入《文选》后才题为此名。() 参考答案:对 10.(判断题) 汉末魏初,以曹操、曹丕、曹植父子为核心,加上孔融、王粲、刘桢、陈琳等所谓“建安七子”,创造了建安文学的辉煌。() 参考答案:对

A、《论语》 B、《庄子》 C、《孟子》 D、《老子》 参考答案:A 2.(单选题) 《大学》最早来源于()。 A、朱熹的《四书章句集注》 B、《礼记》 C、程颢、程颐的整理 D、《论语》 参考答案:B 3.(单选题) 下列著作中,其文汪洋恣肆,仪态万方;想象丰富,构思奇特;幽默机智,妙趣横生;辞藻瑰丽,富有诗意的是() A、《论语》 B、《庄子》 C、《孟子》 D、《老子》 参考答案:B 4.(多选题) “大学之道,_______,______,_______。”(《大学?大学之道》) () A.明明德 B.亲民 C.新民 D.止于至善 E.为政 参考答案:ABD 5.(判断题) 孔子把《大学》列为“四书”之首,它与《论语》、《孟子》、《中庸》一起成为儒家经典。() 参考答案:错 6.(判断题) “富贵不能淫,贫贱不能移,威武不能屈”的提出者是孟子。() 参考答案:对 7.(判断题) 《山木》的“游于道德之乡”,与《逍遥游》中的“无己、无功、无名”,与自然化而为一的意思基本相同。() 参考答案:对 8.(判断题) “知止而后有定,定而后能静,静而后能安,安而后能虑,虑而后能得。”这句使用了“顶针”的修辞手法。() 参考答案:对

华南理工大学_高等数学B下随堂练习参考答案

华南理工大学网络教育平台-*高等数学B(下)-随堂练习参考答案2013-4-10 1.函数定义域为() (A)(B)(C)(D) 答题: A. B. C. D. (已提交) 参考答案:C 问题解析: 2.函数定义域为() (A)(B)(C)(D) 答题: A. B. C. D. (已提交) 参考答案:D 问题解析: 3.函数定义域为() (A)(B)(C)(D) 答题: A. B. C. D. (已提交) 参考答案:C 问题解析:

4.函数定义域为() (A)(B)(C)(D) 答题: A. B. C. D. (已提交) 参考答案:B 问题解析: 5.,则的定义域为() (A)(B) (C)(D) 答题: A. B. C. D. (已提交) 参考答案:C 问题解析: 6.下列函数为同一函数的是() (A)(B) (C)(D) 答题: A. B. C. D. (已提交) 参考答案:D 问题解析:

7. (A)(B)(C)(D) 答题: A. B. C. D. (已提交) 参考答案:A 问题解析: 8. (A)(B) (C)(D) 答题: A. B. C. D. (已提交) 参考答案:B 问题解析: 9. (A)(B)(C)(D) 答题: A. B. C. D. (已提交) 参考答案:D 问题解析: 10. (A)(B)(C)(D) 答题: A. B. C. D. (已提交) 参考答案:C

问题解析: 11. (A)(B)(C)(D) 答题: A. B. C. D. (已提交) 参考答案:B 问题解析: 12. (A)(B)(C)(D) 答题: A. B. C. D. (已提交) 参考答案:A 问题解析: 13. (A)(B)0 (C)(D) 答题: A. B. C. D. (已提交) 参考答案:C 问题解析: 14. (A)(B)0 (C)(D) 答题: A. B. C. D. (已提交)

2014华南理工大学化学与化工学院研究生复试细则及分数线

复试程序: 2014年3月29日 上午8:30凭复试通知书报到,进行复试资格审查,报到地点: 化学考生:逸夫工程馆108室; 化工及专硕考生:逸夫工程馆105室; 请考生报到时携带以下材料: 应届生:学生证、二代身份证、大学成绩单的原件及所有复印件 往届考生:毕业证、学位证、二代身份证、大学成绩单的原件(或加盖档案单位红章的成绩单复印件)及所有复印件 (报到时间地点若有更改,以招办系统打印的复试通知书为准) 下午2:30-4:30笔试,报到地点如下: 复试笔试科目为《基础化学》的考生:34号楼340501 复试笔试科目为《化工原理》的考生:34号楼340502、340503 复试笔试科目为《物理化学(二)》的考生:34号楼340504 2014年3月30日 上午8:00面试 按照考生初试成绩正态分布,将化工学科、化学学科考生分成若干组,同时进行外语口语听力和专业知识综合面试,地点:学院各办公室,届时具体通知。 晚上7:30左右 一、公布录取排名表,按照录取总成绩排名确定录取名单,同时确定获各等次奖学金及全日制专业学位考生名单。地点:学院工程馆大厅布告栏。 二、拟录取考生持学院“录取成绩小条”,根据张贴的导师招生信息,直接去各位导师办公室进行双向选择,确定导师和专业。材料分发地点:学院工程馆105室。 三、确定好导师、专业的考生请立即返回学院工程馆105室登记并领取《体检表》(体检表上需一张照片及加盖学院公章)。

四、成绩小条收取截止时间:晚上10点。未找到导师签名录取的考生,请第二天上午找好导师签名后将成绩单小条交至逸夫工程馆108室。 2014年3月31日 上午8:00-10:30体检,需携带《复试流程表》、《体检表》及时参加校医院体检。 下午3:00体检通过的拟录取考生至学院工程馆105室交回《复试流程表》,并领取以下材料: 1、《调档函》、(委培与强军计划、少高计划考生除外) 2、《政审表》 复试方式: 1. 专业课笔试 2014年招生专业目录公布的复试笔试科目:《化工原理》、《物理化学(二)》、《基础化学》,时间2小时,满分100分,占复试成绩30%,闭卷考试。 2. 外语口语和听力测试 口语与听力相结合,时间约5分钟,满分100分,占复试成绩10%。 3. 专业知识与综合素质面试 专业知识与综合素质面试时间约15分钟,满分100分,占复试成绩60%。 每位考生面试结束后,由复试小组教师独立为考生当场打分,并填写《华南理工大学硕士研究生复试情况登记表》。 录取原则: 1、本着公平、公开、公正的原则进行研究生录取工作,并严格遵守学校招生办公室制定的硕士研究生录取的原则和要求。 2、复试不及格(小于60分)者,不予录取;体检不合格者不予录取。 3、录取总成绩=初试总分×50%+复试成绩×50%×5。 4、按照“化学工程与技术”、“化学”一级学科组织面试,按录取总成绩从高到低按一级学科录取考生,确定拟录取名单后,“双向选择”导师。 5、实施差额复试,比例约为140%(不含推免生)。

华南理工大学英语B(三)随堂练习

随堂练习提交截止时间:2020-06-14 23:59:59 当前页有10题,你已做10题,已提交10题,其中答对10题。 1.(单选题) To top it off, the skewers were presented on a plate with potatoes, sour cream, and a ____ tomato sauce. A. spicy B. excessive C. frozen D. cheerful 答题: A. B. C. D. (已提交) 参考答案:A 问题解析: 2.(单选题) _____ drinking can lead to stomach disorders. A. Spicy B. Excessive C. Frozen D. Cheerful 答题: A. B. C. D. (已提交) 参考答案:B 问题解析: 3.(单选题) The ground was_____ solid. A. spicy B. excessive C. frozen D. cheerful 答题: A. B. C. D. (已提交) 参考答案:C 问题解析: 4.(单选题) I’m going to_____ and cancel my reservation. A. put on B. show up C. call up D. leave alone 答题: A. B. C. D. (已提交) 参考答案:C 问题解析: 5.(单选题) It’s my girlfriend’s birthday party. She will be very upset if I don’t _____. A. put on B. show up C. call up D. leave alone 答题: A. B. C. D. (已提交)

华南理工大学网络教育学院2019年大学英语B一(带答案)解析

1.(单选题) They cancelled the basketball game because of a _____ of interest. A. lack B. need C. lot D. common 答题: A. B. C. D. (已提交) 参考答案:A 问题解析: 2.(单选题) Learning is a long and exciting ______. A. situation B. process C. person D. sign 答题: A. B. C. D. (已提交) 参考答案:B 问题解析: 3.(单选题) I’m _____because I have received lots of presents. A. pleased B. unhappy C. angry D. resent 答题: A. B. C. D. (已提交) 参考答案:A 问题解析: 4.(单选题) I got confused, too. I seem to have ______ in dealing with numbers A.knowledge B.development C.challenge D.difficulty 答题: A. B. C. D. (已提交) 参考答案:D

问题解析: 5.(单选题) People use more words when they ______ with each other. A.complete B.communicate C.associate D.acquire 答题: A. B. C. D. (已提交) 参考答案:B 问题解析: 6.(单选题) ―How are you doing, Frank? ―_______________ A. How are you doing? B. How do you do? C. Great, thanks! D. It’s nice meeting you! 答题: A. B. C. D. (已提交) 参考答案:C 问题解析: 7.(单选题) ―Hi, it is nice to meet you! ―______________________ A. Nice to meet you, too. B. Fine, thank you! C. Good to you. D. How are you? 答题: A. B. C. D. (已提交) 参考答案:A 问题解析: 8.(单选题) ―Hello, I’m Robin.

华南理工大学高数习题册答案汇总

第七章 多元函数微分学 作业1 多元函数 1.填空题 (1)已知函数22,y f x y x y x ? ?+=- ???,则(),f x y =()() 222 11x y y -+; (2)49 arcsin 222 2-+++=y x y x z 的定义域是(){} 22,49x y x y ≤+≤; (3))]ln(ln[x y x z -=的定义域是 (){}(){},,0,1,0,1x y x y x x y x x y x >>+?<<≤+; (4)函数??? ??=≠=0, 0,sin ),(x y x x xy y x f 的连续范围是 全平面 ; (5)函数2222y x z y x +=-在2 2y x =处间断. 2.求下列极限 (1 )00 x y →→; 解:0000 1 6x t t y →→→→===- (2)2 2 () lim (e x y x y x y -+→+∞→+∞ +).

解:3 y x =22()2() lim (e lim (e 2x y x y x y x x y y x y x y xe ye -+-+--→+∞→+∞ →+∞ →+∞ ??+=+-??)) 由于1lim e lim lim 0t t t t t t t t e e -→+∞→+∞→+∞===,2222lim e lim lim lim 0t t t t t t t t t t t e e e -→+∞→+∞→+∞→+∞====, 故22() 2()lim (e lim (e 20x y x y x y x x y y x y x y xe ye -+-+--→+∞ →+∞→+∞ →+∞ ??+=+-=??)) 3.讨论极限2630 0lim y x y x y x +→→是否存在. 解:沿着曲线()()3 ,,0,0y kx x y =→,有3 36626262000 lim lim 1x x y kx x y kx k x y x k x k →→=→==+++因k 而异,从而极限26 30 0lim y x y x y x +→→不存在 4.证明?? ???=+≠++=0,00,2),(22222 2y x y x y x xy y x f 在点)0,0(分别对于每个自变量x 或y 都连续,但作为二元函数在点)0,0(却不连续. 解:由于(,0)0,(0,)0,f x f y ≡≡ 从而可知在点)0,0(分别对于每个自变量x 或y 都连续,但沿着曲线 ()(),,0,0y kx x y =→,有22 22222000 222lim lim 1x x y kx xy kx k x y x k x k →→=→==+++因k 而异, 从而极限()0 lim ,x y f x y →→不存在,故作为二元函数在点)0,0(却不连续.

华南理工大学物理化学物理化学复习纲要(完整整理版)

物理化学复习提纲 (华南理工大学物理化学教研室葛华才) 第一章气体 一.重要概念 理想气体,分压,分体积,临界参数,压缩因子,对比状态 二.重要关系式 (1) 理想气体:pV=nRT , n = m/M (2) 分压或分体积:p B=c B RT=p y B (3) 压缩因子:Z = pV/RT 第二章热力学第一定律与热化学 一、重要概念 系统与环境,隔离系统,封闭系统,(敞开系统),广延量(加和性:V,U,H,S,A,G),强度量(摩尔量,T,p),功,热,内能,焓,热容,状态与状态函数,平衡态,过程函数(Q,W),可逆过程,节流过程,真空膨胀过程,标准态,标准反应焓,标准生成焓,标准燃烧焓 二、重要公式与定义式 1. 体积功:W= -p外dV 2. 热力学第一定律:U = Q+W,d U =Q +W 3.焓的定义:H=U + pV 4.热容:定容摩尔热容 C v ,m = Q V /dT = (U m/T )V 定压摩尔热容 C p ,m = Q p /dT = (H m/T )P 理性气体:C p,m- C v,m=R;凝聚态:C p,m- C v,m≈0 理想单原子气体C v,m =3R/2,C p,m= C v,m+R=5R/2 5. 标准摩尔反应焓:由标准生成焓 f H B (T)或标准燃烧焓 c H B (T)计算 r H m = v B f H B (T) = -v B c H B (T) 6. 基希霍夫公式(适用于相变和化学反应过程) ?r r r=?r r r r(r1)+∫?r r r,r r2 r1 rr 7. 恒压摩尔反应热与恒容摩尔反应热的关系式 Q p -Q v = r H m(T) -r U m(T) =v B(g)RT 8. 理想气体的可逆绝热过程方程: p 1V 1 ?= p 2 V 2 ?,p 1 V 1 /T1 = p2V2/T2,?=C p,m/C v,m 三、各种过程Q、W、U、H的计算1.解题时可能要用到的内容 (1) 对于气体,题目没有特别声明,一般可认为是理想气体,如N 2,O 2 ,H 2 等。 恒温过程d T=0,U=H=0,Q=W 非恒温过程,U = n C v,m T,H = n C p,m T 单原子气体C v ,m =3R/2,C p,m = C v,m+R = 5R/2 (2) 对于凝聚相,状态函数通常近似认为只与温度有关,而与压力或体积无关,即 U≈H= n C p,m T

华南理工大学英语B第三次作业答案

A. B. D. The high quality and reasonable price make the customers have strong A. B. D. More practice can help you to get ________ of your shyness in public. A. B. D. To forget is natural ________; to remember is unnatural and require A. B. D.

A. B. D. There is no reason for an able man to ________ himself that he can’t A. B. D. Erase the negative notion and adopt a ________ spirit, and you gain A. B. D. ________ makes success a certainty, while inconstancy often results A. B. D. Unit Two A. B. D. Life without passion would be ________.

A. B. D. We are supposed to ________ nothing but dreams. A. B. D. Many people felt ________ to help the victims after being told the A. B. D. In the U.S., there are some limits on what you can ask or expect A. B. D. The sex discrimination goes ________ the principle of equality. A. B. D. Really friendly people respect everyone ________. A. B. D. Unit Three

《大学英语B(一)》·平时作业-2020年华南理工大学网络教育学院

提交方式:文本框粘贴 1.We Need A Green World Everyone wants to have a blue sky, everyone wants to breathe fresh air, everyone dreams of a green world. But our city is sick, his blue eyes are covered by sand and dust, and he can't see us clearly; his beautiful voice is eroded by the haze and can't sing with us. What shall I do? What shall I do? The teacher said to take good care of the environment, start from everyone. The best and most effective way I can think of is to travel green. If we go to a place, we can walk or ride a bicycle, and take a bus at a distance. My parents and I went out by bike this weekend. If we reduce the number of times we drive private cars, the exhaust of cars will be reduced. If adults protect the environment, the exhaust gas of the factory will also be reduced, then PM2. The value of 5 will decrease. Our

华南理工大学物理随堂练习答案

1.? ?一质点在平面上作一般曲线运动,其瞬时速度为,瞬时速率为v,,某一时间内的平均速度为,平均速率为,它们之间的关系必定有: (A)?(B)(C)?(D)? 答题:??A.??B.??C.??D.?(已提交) 参考答案:D 问题解析: 2.? 一质点在平面上运动,已知质点位置矢量的表示式为?(其中a、b为常量), 则该质点作? (A) 匀速直线运动. (B) 变速直线运动. (C) 抛物线运动. (D)一般曲线运动.? 答题:??A.??B.??C.??D.?(已提交) 参考答案:B 问题解析: 3.? 如图所示,湖中有一小船,有人用绳绕过岸上一定高度处的定滑轮拉湖中的船向岸边运动.设 该人以匀速率收绳,绳不伸长、湖水静止,则小船的运动是? (A) 匀加速运动. (B) 匀减速运动. (C) 变加速运动. (D) 变减速运动.? 答题:??A.??B.??C.??D.?(已提交) 参考答案:C 问题解析: 4.? 一飞机相对空气的速度大小为 200 km/h, 风速为56 km/h,方向从西向东.地面雷达站测得飞机速度大小为 192 km/h,方向是? ? (A) 南偏西°.? (B) 北偏东°? (C) 向正南或向正北. (D) 西偏北°.(E) 东偏南°.? 答题:??A.??B.??C.??D.?(已提交) 参考答案:C 问题解析: 5.? 对于沿曲线运动的物体,以下几种说法中哪一种是正确的:? (A) 切向加速度必不为零.? (B) 法向加速度必不为零(拐点处除外).? (C) 由于速度沿切线方向,法向分速度必为零,因此法向加速度必为零.? (D) 若物体作匀速率运动,其总加速度必为零.?

华南理工大学分析化学试题A卷

华南理工大学分析化学试题A卷

A. 30.44 B. 30.52 C. 30.48 D. 30.12 4.滴定度是标准溶液浓度的表示方式之一,其表达式为(A为被测 组分,B为标准溶液): A. T A/B = m A/V B B. T B/A = m B/V A C. T A/B = V B / m A D. T B/A = V B / m A 5..在下列各组酸碱组分中,不属于共轭酸碱对的是: A.HCN-NaCN,B.H3PO4- Na3PO4 C.H2CO3 - NaHCO3D.NH4+ - NH3 6.下列物质中,可以直接配成标准溶液的物质是: A.NaOH,B.KMnO4 C.ZnO D.AgNO3 7.有A、B两份不同浓度的有色溶液,A溶液用1.0cm吸收池, B溶液用2.0cm吸收池,在同一波长下测得的吸光度的值相等, 则它们的浓度关系为: A.A是B的1/2; B. A等于B; C.B是A的4倍; D. B是A的1/2 8.液液萃取分离中,同一物质的分配系数K D与分配比D的数值不同,这是因为该物质在两相中的 A.浓度不同; B. 溶解度不同; C.化合能力不同; D. 存在形式不同 9.离子选择性电极的电位选择性系数可用于: A. 估计电极的检测限 B. 估计共存离子的干扰程度 C. 校正方法误差 D. 计算电极的响应斜率 10.电位滴定是以测量电位的变化情况为基础,下列因素影响最大的是: A. 参比电极; B. 液接电位; C. 不对称电位; D. 被测离子活度 11. 若分光光度计的仪器测量误差ΔT=0.5%,在T=50%时,由测量引起 的浓度相对误差为: A.1.0%B. 1.4%C. 1.8% D.2.2%

华南理工大学大学化学试卷A及答案讲诉

一、单项选择题(按题目中给出的字母A、B、C、D,您认为哪一个是正确的,请写在指定的表格内)(每题1.5分,共30分) 题号 1 2 3 4 5 6 7 8 9 10 答案 题号11 12 13 14 15 16 17 18 19 20 答案 1.用来表示核外某电子运动状态的下列各组量子数(n, l i,m i , s i )中,哪一组 是合理的? (A) 2, 1, -1, -1/2;(B) 0, 0, 0,1/2 (C) 3, 1, 2, 1/2;(D)2, 1, 0, 0 2.若将N原子的基电子组态写成1s22s22p x 2p y 1违背了下列的哪一条? (A) Pauli 原理;(B) Hund规则;(C)能量最低原理;(D) Bohr理论。 3.在以下四种电子组态的原子中,第一电离能最大的是哪一个?(A) ns2np6;(B) ns2np5; (C) ns2np4;(D) ns2np3。 4. 下列哪种晶体熔化时,需要破坏共价键的作用? (A)HF; (B)Al; (C)KF; (D)SiO 2 ; 5. 石墨中,下列哪种结合力是层与层之间的结合力? (A)共价键; (B)范德华力 (C)离子键; (D)金属键; 6.下列哪一种物质中存在氢键作用? (A)H 2Se; (B)C 2 H 5 OH (C)HCl; (D) C 6H 6 ; 7.当0.20mol·L-1HA(K=1.0×10-5)处于平衡状态时,其溶液中物质的量浓 度最小的是 (A) H+(B)OH- (C) A-(D)HA 8.反应:NO(g)+CO(g)1 2 N2(g)+CO2(g)的 r H= -374kJ·mol-1,为提高NO 和CO转化率,常采取的措施是

华南理工大学网络教育学院2019年大学英语B一(带答案).docx

1.(单选题) They cancelled the basketball game because of a ___ of interest. A. lack B. need C. lot D. common 答题: A. B. C. D. (已提交) 参考答案:A 问题解析: 2.(单选题) Learning is a long and exciting A. situation B. process C. person D. sign 答题: A. B. C. D. (已提交) 参考答案:B 问题解析: 3.(单选题) I' m ___ because I have received lots of presents. A. pleased B. unhappy C. angry D. resent 答题: A. B. C. D. (已提交) 参考答案:A 问题解析: 4. __________________________________________ (单选题) I got confused, too. I seem to have _______________________________________ in dealing with numbers A.knowledge B.development C.challenge D.difficulty 答题: A. B. C. D. (已提交) 参考答案:D 问题解析:

5. __________________________________________ (单选题) People use more words when they _______________________________________ with each other. A.complete B.communicate C.associate D.acquire 答题: A. B. C. D. (已提交) 参考答案:B 问题解析: 6. (单选题)― How are you doing, Frank? A. How are you doing? B. How do you do? C. Great, thanks! D. It' s nice meeting you! 答题: A. B. C. D. (已提交) 参考答案:C 问题解析: 7. (单选题)― Hi, it is nice to meet you! A. Nice to meet you, too. B. Fine, thank you! C. Good to you. D. How are you? 答题: A. B. C. D. (已提交) 参考答案:A 问题解析: 8. (单选题)― Hello, I'm Robin. ― ______________ My name is Anna. A. How are you? B. How do you do? C. You can call me Bob. D. Fine, thanks. 答题:A. B. C. D.

2017年华南理工大学大学英语B(二)模拟试题

2017年华南理工大学大学英语B(二)模拟试题 I. Vocabulary and Structures (20 points) Directions:In each of the following sentences, there are 4 choices marked A), B), C), and D). Choose the ONE answer that best completes each sentence. 1. — I was worried about my maths, but Mr. Brown gave me an A. — ___ B ____ A. Don’t worry about it. B. Congratulations! That’s a difficult course C. Mr. Brown is very good. D. Good luck to you! 2. — I’ve got two tickets for the match. Shall we go and watch it together? — __ C _____ A.he tickets must be expensive. B. The match must be exc iting . C. Why not? Let’s go. D. The place is too far aw ay. 3. — Hello, I'm Harry Potter. — Hello, my name is Charles Green, but __ A ____. A. call me Charles B.call my Charles C.call me at Charles D.call Charlesme 4. — Excuse me, could you show me the way to the nearest post office? —____ D ______ Oh yes! Two blocks away from here at the Green Avenue. You can’t miss it. A.I beg your pardon? B.What do you mean? C.You're welcome. D.Mm,let me think 5. — Oh, sorry to bother you. — ____ A ___ A. That's okay. B. No, you can't. C. That's good. D. Oh, I don't know. 6. We came finally __ C____ the conclusion that she has been telling lies all the time. A. of B. into C. to D. at

华南理工大学分析化学考研复习攻略与心得

华南理工大学化学与化工学院分析化学专业硕士研究生考试科目为政治、英语、629物理化学(一)和880分析化学,复试是基础化学。专业研究方向包括化学动力学、催化作用与催化剂、应用量子化学、电化学及燃料电池、材料化学、纳米化学及技术等。先说一些数据,每年华工化学与华工学院的考研人数超过1200人,招生约240,其中保研人数约1/3,所以考研成功的概率约15%,竞争压力是挺大的。尤其是热门专业的竞争更剧烈,录取率更低。好了,看到这可能很多人已经犹豫要不要放弃或者转考其他学校了。其实不必紧张,热门学校必然有值得你去拼搏的地方。考研决心很重要,尽管很多人考研,但是真正认真备考坚持下来的并不多。如果没有理由和动力去支撑自己的考研之路,是很难坚持走下去的。我的理由之一就是实现我高考遗落的目标——华南理工大学。我本科是普通二本学校,初试总分389(政治75/英语63/分析125/物化126),排名第6位,处于中间偏上。复试比较顺利,英语口语发挥得不是很好,分数比较低,我得了二等奖学金,不用交学费,挺爽的。回想当时考研复习的时光,我经历了很多,其中有苦有乐,也有很多经验想和大家分享。近来有师弟师妹问我复习经验,于是写下这篇心得,仅供各位参考。之前看过别人写的经验,讲自己考研挺轻松,没花多少时间,那大多数是假的,当然我也不否定有些天才的存在。若还有其他问题家抠衣舞铃陆舞衣贰舞漆叁跟我探讨探讨,相互学习,共同进步(但是不要骚扰哦,呵呵)。 一、考试大纲和参考书目 629分析化学:《分析化学》(第五版)华东理工大学化学院与四川大学化工学院合编,高等教育出版社;629物理化学(一):《物理化学》(第五版)傅献彩等编著,高等教育出版社 心得:其实这些书都就是自己本科学的专业教材或者相似教材。很多人都会问,有没有复习重点呀?事实上,看过历年真题就知道,考的多数是很基础的内容,但是想考高分还是得把书本好好复习,争取把课本上的每个知识点都看一遍。另外,可以购买一些考研资料,配合书本复习,吸取前人经验,复习起来也没那么枯燥,效率也比较高。 629物理化学(一)考试大纲 一. 绪论与气体性质:1. 了解物理化学的研究对象、方法和学习目的。2. 掌握理想气体状态方程和混合气体的性质(分压和道尔顿定律、分容和阿马格定律)。3. 了解实际气体的状态方程(范德华方程)。4. 了解实际气体的液化和临界性质。 二. 热力学第一定律:1. 理解下列热力学基本概念:平衡状态,状态函数,可逆过程,热力学

华南理工大学 2018平时作业:《经济数学》答案

《经济数学》 作业题 第一部分 单项选择题 1.某产品每日的产量是 x 件,产品的总售价是 1 2 x 2 + 70x +1100 元,每一件 的成本为 (30 + 1 3 x ) 元,则每天的利润为多少?(A ) A . 1 6 x 2 + 40x +1100 元 B . 1 6 x 2 + 30x +1100 元 C . 56 x 2 + 40x +1100 元 D . 56 x 2 + 30x +1100 元 2.已知 f (x ) 的定义域是[0,1] ,求 f (x + a ) + f (x - a ) , 0 < a < 1 的定义域是? 2 (C ) A .[-a ,1- a ] B .[a ,1+ a ] C .[a ,1- a ] D .[-a ,1+ a ] 3.计算 lim sin kx = ?(B ) x →0 x A . 0 B . k C . 1 k D . ∞

4.计算 lim(1+ 2)x = ?(C ) x →∞ x A . e B . 1 e C . e 2 D . 1 e 2 ? 2 + b , x < 2 ?ax 5.求 a , b 的取值,使得函数 f (x ) = ? 1, x = 2 在 x = 2 处连续。(A ) ? + 3, x > 2 1 ? bx A . a = ,b = -1 2 B . a = 3 ,b = 1 2 C . a = 1 ,b = 2 2 D . a = 3 ,b = 2 2 3 6.试求 y = x 2 + x 在 x = 1 的导数值为(B ) A . 3 2 B . 5 2 C . 12 D . - 1 2 7.设某产品的总成本函数为: C (x ) = 400 + 3x + 1 2 x 2 ,需求函数 P = 100 x ,其中 x 为产量(假定等于需求量), P 为价格,则边际成本为?(B ) A . 3 B . 3 + x C . 3 + x 2 D . 3 + 1 2 x

2019华南理工大学《经济数学》作业题参考答案

《经济数学》作业题 一、计算题 1.某厂生产某产品,每批生产x 台得费用为()5200C x x =+,得到的收入为2()100.01R x x x =-,求利润. 解:利润=收入-费用 Q (x )=R(x)-C(x)=5x-0.01x^2-200 2 .求0x →. 解:原式=0lim x →230lim x →0 lim x →3/2=3/2 3.设213lim 21 x x ax x →-++=+,求常数a . 解:有题目中的信息可知,分子一定可以分出(x-1)这个因式,不然的话分母在x 趋于-1的时候是0,那么这个极限值就是正无穷的,但是这个题目的极限确实个一个正整数2,所以分子一定是含了一样的因式,分母分子抵消了, 那么也就是说分子可以分解为(x+1)(x+3)因为最后的结果是(-1-p )=2所以p=-3,那么也就是说(x+1)(x+3)=x^2+ax+3 所以a=4 4.设()(ln )f x y f x e =?,其中()f x 为可导函数,求y '. 解:y '= )('.).(ln ).(ln '1)()(x f e x f e x f x x f x f + 5.求不定积分ln(1)x x dx +?. 解:

c x x x x x dx x x x x x dx x x x x x x x dx x x xdx x x dx x x x x x x dx x x x x dx x x ++-+-+=+-+-+=+-++-+=++-+=+-+-+=++-+=+???????)1ln(2 12141)1ln(2111212141)1ln(2112141)1ln(2112121)1ln(21121)ln(21)1(2)1ln(21)1ln(222222222222 5.设1 ln 1b xdx =?,求b. 解: e b b b b b b b b x xd x x b ===-=----?1 ln 0ln )1(0ln ) (ln ln 1 7.求不定积分?+dx e x 11. 解:?+dx e x 11.=ln(1)x c e --++ 8.设函数?????=≠--=4 , 4, 416)(2x a x x x x f 在),(+∞-∞连续,试确定a 的值. 解:x 趋于4的f(x)极限是8 所以a=8 9.求抛物线22y x =与直线4y x =-所围成的平面图形的面积. 解:首先将两个曲线联立得到y 的两个取值y1=-2,y2=4 X1=2,x2=8 2 42(4)2y dy y -- ++?=-12+30=18

华南理工大学化工原理大纲

851化工原理考试大纲 一、课程的性质 本课程是化工及相关专业的一门专业基础课。通过本课程的教学使学生掌握流体流动、传热和传质基础理论及主要单元操作的典型设备的构造、操作原理;工艺设计、设备计算、选型及实验研究方法;培养学生运用基础理论分析和解决化工单元操作中的各种工程实际问题的能力。并通过实验教学,使学生能巩固加深对课堂教学内容的理解,强调理论与实际结合,综合分析问题、解决问题的能力。 二、课程的基本要求和内容 绪论 本课程的性质、任务、研究对象和研究方法,本课程与其他有关课程的关系。 Δ物理量的因次、单位与单位换算:单位制与因次的概念。几种主要单位制(SI.CGS制.MKS工程单位制)及我国的法定计量单位。单位换算的基本方式。 第一章流体流动 流体的性质:连续介质的假定、密度、重度、比重、比容、牛顿粘性定律与粘度。 牛顿型与非牛顿型流体。 流体静力学:静压强及其特性;压强的单位及其换算;压强的表达方式;重力场中静止流体内压强的变化规律及其应用;离心力场中压强的变化规律。 流体流动现象:流体的流速和流量;稳定流动与不稳定流动;流体的流动型态;雷诺准数;当量直径与水力半径;滞流时流体在圆管中的速度分布;湍流时的时均速度与脉动速度;湍流时圆管中时均速度的分布;边界层的形成、发展及分离。 流体流动的基本方程:Δ物料衡算——连续性方程及其应用;Δ能量衡算方程;柏势利方程;Δ能量衡算方程和柏势利方程的应用。 流体阻力:Δ阻力损失的物理概念;边界层对流动阻力的影响;粘性阻力与惯性阻力;湍流粘度系数;Δ沿程阻力的计算;滞流时圆管直管中沿程阻力计算;滞流时的摩擦

系数;湍流时的摩擦系数;因次分析法:用因次分析法找出表示摩擦阻力关系中的数群;粗糙度对摩擦系数的影响;Δ局部阻力的计算。 管路计算:管径的选择;Δ简单管路、并联管路及分支管路的计算;管路布置中应注意的主要事项。 流量与速度的测量:测速管、孔板、文丘里流量计及转子流量计的构造、原理及应用;流量计的选型、安装及使用。 第二章流体输送机械 概述:流体输送问题的重要性,流体输送机械的类别,泵的主要性能参数(扬程、流量、效率与功率)。 离心泵:Δ离心泵的基本构造与作用原理(包括轴向推力的平衡方法及气缚现象);Δ离心泵的理论分析(离心泵基本方程,从基本方程分析离心泵的结构和性能);离心泵内各种损失);Δ离心泵的特性曲线及其应用;不同条件下离心泵特性曲线的换算;离心泵的气蚀现象与允许安装高度;Δ离心泵的工作点与理论调节;Δ离心泵的类型与选择。 其他类型泵:Δ往复泵的基本构造、作用原理及理论调节方法;Δ齿轮泵、螺杆泵及旋涡泵的作用原理及理论调节方法;各种泵的适用场合;Δ正位移泵与离心泵的比较。 离心式风机的特性曲线及选型。 第三章非均相物系的分离及固体流态化概念 概念:气态非均相物系与液态非均相物系;非均相物系分离在化工生产中的应用。 重力沉降:Δ颗粒沉降的基本规律(沉降过程的力学分析,自由沉降时沉降速度的计算)重力沉降器,悬浮液的沉聚过程;沉降过程的强化途径。 离心沉降:惯性离心力作用下的沉聚速度;Δ旋风分离器(基本构造.作用原理、分离效率.流体阻力、结构型式与选用);旋液分离器;沉降式离心机。

相关文档
相关文档 最新文档