人教版新课标选修7第三单元精讲讲义(附练习答案)

选修7第3单元

Ⅰ. 要点导读

1. It was a time when the killer whales … helped the whalers catch the baleen whales that were on their annual migration. (P19) annual adj.“每年的；一年一度的”eg: Please hand in your annual report of sales, and the chairman will check it.

annually adv.“每年地；年度地”eg: They plan to hold the exhibition of cars annually.

2. I thought, at the time, that this was just a story but then I witnessed it with my own eyes many times. (P20)

witness(1) v.“亲眼看到；目睹”eg: The old lady witnessed the accident at 3 o’clock on Saturday afternoon.

“见证”eg: This century has witnessed the steady growth of urban centers.

(2) n.“目击者”；bear witness to“为……作证”eg: The man’s fingerprints bore witness to his guilt.

3. And those others are stopping it fleeing out to sea … (P20)

flee“逃跑；逃避”vi.常和from或to搭配，“从……逃走；逃到……”

eg: The enemy were defeated, fleeing in disorder.

The robbers tried to flee from the house, but failed.

vt. 后面直接跟逃跑的地点，没有被动语态。eg: The two girls fled the club and called the policeman.

flee与escape的区别：两者都有“逃脱；逃跑”的意思，都既可作及物动词又可作不及物动词。区别在于：escape作不及物动词时，强调逃跑之后的结果，而非逃跑的动作；作及物动词时，后面要跟动词的-ing形式。flee则着重于动作本身，尤其指害怕有危险而逃跑或逃避。eg: The little girl always escapes into her own dream world.

With the help of firemen, they fled the burning house.

4. Within a moment or two, its body was dragged by the killers down into the depths of the sea. (P20)

drag v.“(使劲而吃力地)拖，拉；缓慢而费力地移动；(时间等)过得很慢”

常见的搭配：drag … out of / from“把……从……拉出”；drag … into“没必要地把……扯到……里”；

drag on“持续得太久”；drag one’s feet“故意拖延”。

eg: The horse was dragging a heavy load along the road.

It was midnight, but she still couldn’t drag herself from the party.

Why did you drag him into the trouble?

drag, draw 与pull的区别：这三个词都有“拖，拉”的意思。drag指缓慢而艰难地拖、拉较重的东西；draw一般指比较从容地拖、拉；pull强调一时或突然的动作。eg: The thief was dragged out of his hiding place.

He drew a chair up to the table and began his dinner.

He pulled the door open and rushed out.

depth n.“深处；深度；(知识)渊博；(感情)深厚”eg: What’s the depth of the lake?

This book shows that his is a writer of great wisdom and depth.

at a depth of“在……的深度”eg: Coal was found at a depth of 300 meters underground.

in the depths of“在……的深处”eg: In the depths of my heart, I was grateful to her.

in depth“在深度上；深入地”；beyond one’s depth“超出某人的理解力”。

5. From James’s face, I could see he was terrified of being abandoned by us. (P21)

abandon (1) v.“放弃”eg: The two thieves abandoned the stolen car and ran away.

“(不顾责任、义务等)离弃/ 抛弃”eg: The study showed a deep fear among the elderly of being abandoned by

their children.

(2) adj.“被离弃的；被抛弃的”eg: There was an abandoned house on the island.

They found the baby abandoned but unharmed.

6. Every summer I rent a room near the beach for a week. (P22)

rent(1) v.“租用；租借”；rent … from sb“从某人处租借”；rent …(out) to sb“将……租给某人”

eg: We rented the flat from a local guide.

Mr. Smith rented his house to the tourists from the faraway places.

(2) n.“租金”；for rent“出租；招租”eg: The landlord has put the rent up again.

I am looking for a house for rent.

7. I’m sitting in the warm night air with a cold drink in my hand and reflecting on the day—a day of pure magic! (P23)

reflect vi.“思考”；reflect on / upon“仔细考虑”eg: Have you reflected on / upon the decision?

reflect后常跟副词well, badly, seriously等。eg: What he had done reflected seriously on his future career.

vt.“反射(声，光，热等)；反映；表达”eg: When the sun’s rays hit the earth, a lot of heat is reflected back into space.

Does this letter reflect how you really think?

8. The first thing I became aware of was all the vivid colours surrounding me—purples, reds, oranges, yellows, blues and greens. (P23)

aware v.“意识到”，其后常跟介词of或that从句。eg: He is well aware of the importance of learning English.

They suddenly became aware that people were looking at them.

9. George said as he ran ahead of me. (P20)

ahead of“(空间上、时间上)在……前面”eg: Ahead of us was a tower.

They finished the task 10 days ahead of the deadline.

“比……好；领先于……”eg: He is ahead of me in English.

His ideas were ahead of his time.

10. “In the meantime, Old Tom, and the others are having a good feed on its lips and tongue,” added Red, laughing. (P20)

in the meantime“同时”，meantime adv.“与此同时；在这期间”

eg: I’ll call you when he comes. In the meantime I must give you something to do.

I’ll contact them soon. Meantime don’t tell them I’m back.

11. We ran down to the shore in time to see an enormous animal throwing itself out of the water and then crashing down again.

(P20) throw oneself out of“跃出；跳出”

eg: On the night before the earthquake, many people found that many fish threw themselves out of water.

throw oneself into“扑倒在……里；投身于……”eg: Hearing the sad news, Della threw herself into her coach.

The young man threw himself into his research in his spare time.

throw sb out (of)“撵出；逐出”；throw out“随口说出；拒不接受(建议、想法)”

eg: The noisy children were thrown out of the hall.

Don’t be serious! He just threw it out!

12. … so even though I didn’t have the right clothes on, I grabbed my boots and raced after him. (P20)

race after“追赶；追逐”eg: On the screen there are several lions racing after an antelope on the grassland.

race against“和……比赛；竞争”eg: Real Madrid will race against Barcelona tonight.

race against the clock“争分夺秒”eg: Diana raced against the clock to finish the paper.

race for“为……而竞争”

13. We ran down to the shore in time to see an enormous animal throwing itself out of the water and then crashing down again.

(P20) crash down“轰然倒下；摔碎”eg: Some buildings crashed down by the earthquake.

She crashed the plates down on the table.

crash (…) into …“(使……)撞到……上”eg: He crashed his car into a nearby house because of over speeding.

The plan crashed into a mountain soon after it took off.

14. What evidence was there that old Tom was helping out the whalers? (P21)

help out“帮助……(摆脱困境或危难)”eg: If you haven’t got time to finish it, I’ll help you out.

He was obviously in some kind of trouble, but I didn’t know how I could help him out.

can’t help doing sth“禁不住做某事”eg: I couldn’t help laughing when he made faces.

can’t help but“不能不”eg: When a friend gave Jim a ticket to the game, he couldn’t help but go.

15.—the yellow and green parrotfish hanging upside down, gathering tiny plants off the coral with its hard bird-like mouth.

(P23) upside down“倒悬”eg: You’ve hung that picture upside down.

“上下颠倒；乱七八糟”eg: The thieves had turned the house upside down to look for the money.

16. I told myself they weren’t dangerous but that didn’t stop me from feeling scared to death for a moment! (P23)

(be) scared to death“吓(怕)得要死”eg: She was nearly scared to death when she witnessed the accident.

be scared of“害怕”eg: The child was scared of the fierce-looking dog.

scare sb into doing sth“恐吓某人干某事”eg: His warning scared her into following him.

scare off / away“将……吓跑了”eg: We lit a fire to scare away the wolves.

Ⅱ. 热点语法：动词-ing形式的被动形式

当动词-ing形式的逻辑主语是动作的承受者时，就要用动词-ing形式的被动形式。

一、动词-ing形式的被动形式分为一般式being + 动词-ed形式和完成式having been + 动词-ed形式。一般式表示这个动作正在发生或与谓语动词所表示的动作同时发生；完成式表示这个动作在谓语动词的动作之前发生。

注意：动词-ing形式的被动式的否定式为not + 动词-ing形式的被动式。

eg: They complained for not being treated as equals.

He was apologized for the task not having been completed on time.

二、动词-ing形式的被动形式可在句子中充当下列成分：

1、主语：Being loved by others is happy.

2、宾语：I don’t like being laughed at in public.

I remembered having been taken to Beijing when I was very young.

3、定语：This is one of the experiments being carried on in our laboratory.

4、状语：Being protected by a thick wall, we felt quite safe.

Having been given two more days, they finished the task.

5、宾补：When we approached the village we saw new houses being put up.

You could hear many things being discussed here.

语法聚焦

1. After the accident, the police spent a week finding out the person who it.

A. witnessed

B. stared at

C. proved

D. heard of

2. The water was so clear that it the trees on the river bank.

A. shadowed

B. shaded

C. photographed

D. reflected

3. The thief ran away before I was of what had happened.

A. aware

B. accused

C. tired

D. ashamed

4. I was about to go out for a walk it began to rain.

A. when

B. while

C. as

D. whenever

5. The woods in our village and burned at such a speed that they will disappear in the future.

A. cut down

B. was cut down

C. are being cut down

D. had been cut down

6. Entering the reading-room, I found Kate at the table and a report.

A. sat; written

B. seated; writing

C. seating; writing

D. sitting; written

7. ---Hi, Jack! Long time no see. How are you?

---Oh, Martin! I you. I’m fine. Let’s have a drink.

A. don’t recognize

B. didn’t recognize

C. can’t recognize

D. won’t recognize

8. When a friend invited me to the party I .

A. couldn’t help but go

B. couldn’t help but going

C. can’t help but go

D. can’t help but going

9. in a heavy traffic jam in a taxi while you are hurrying to the airport is quite an unpleasant experience.

A. Catch

B. Being caught

C. To catch

D. Having caught

10. The foreign friends you referred to looking forward to around our university.

A. are; being shown

B. being; be shown

C. being; showing

D. are; be shown

11. I could see little Tom was afraid of by us from his look on his face.

A. being abandoned

B. abandoning

C. to abandon

D. abandoned

12. I really can’t understand her like that.

A. having treated

B. treat

C. to treat

D. being treated

13. No one can avoid by the surroundings.

A. to be influenced

B. having influenced

C. being influenced

D. influencing

14. We must keep a secret of the things at present.

A. to be discussing

B. to discuss

C. discussing

D. being discussed

15. to hospital in time, the wounded were saved at last.

A. To be taken

B. Having been taken

C. Having taken

D. To take

Ⅲ. 综合训练

一、单项选择

1. Many car accidents happened at this turn of the road.

A. sharp

B. urgent

C. immediate

D. quick

2. She was scared stay outside after dark because she was scared being robbed.

A. to; to

B. to; of

C. of; to

D. of; of

3. Before I give you my final decision, I need time to your suggestion once more.

A. pick out

B. try out

C. test out

D. reflect on

4. Several days went by before I was of what was happening.

A. aware

B. awaring

C. awareness

D. realized

5. My little brother was obviously in some kind of trouble, but I really didn’t know how to .

A. figure him out

B. sort him out

C. help him out

D. take him out

6. The policeman, who had many dangers, lost his life for his career when carrying out his task.

A. interviewed

B. leaped

C. witnessed

D. harnessed

7. Before liberation, he was a slave and at last he to join the army.

A. slept

B. fled

C. caught

D. flew

8. The tired traveler her feet towards the next town.

A. pulled

B. dragged

C. pushed

D. hit

9. Our government ordered that supermarkets the use of plastic bags.

A. continue

B. continued

C. abandon

D. abandoned

10. ---How come you are so late?

--- But I was stuck in a traffic jam.

A. Pardon?

B. Take it easy.

C. Nothing serious.

D. I’m sorry.

11. the small village now is short of food.

A. To flood

B. Having flooded

C. Being flooded

D. Have been flooded

12. In those days, the little boy often went to the dock to watch the ships .

A. loading and unloading

B. load and unload

C. being loaded and unloaded

D. to be loaded and unloaded\

13. ---It’ll take 2 hours to do this!

---Oh, ! We don’t have much time.

A. come on

B. no problem

C. no hurry

D. that’s OK

14. They urged the students the work on time.

A. finishing

B. to finish

C. finished

D. have finished

15. I don’t mind by my teachers.

A. criticize

B. criticized

C. being criticized

D. criticizing

二、完形填空

When we want to tell other people what we think about, we can do it with the help of words or with the help of signs. We 16 move our heads up and down when we want to say “yes”, and from side to side 17 we want to say “no”.

People, who cannot hear or speak, talk to each other with the help of their fingers. People who do not 18 each other’s language

have to do the same. This story 19 how they sometimes do it.

A man who could not speak 20 was once in Canada. One day he went to a 21 and sat down at a table. When the waiter came, the man opened his mouth, put his 22 in it. He wanted to say, “Bring me something to 23 .”

The waiter soon brought him a cup of 24 . The man moved his hand from side to side. The waiter understood him 25 took away the tea. In a moment he brought a cup of coffee and put it on the table. The man moved his head from side to side. He was very 26 but he did not want to drink. He shook his head when the waiter brought him a lot of 27 drinks, but drinks are not 28 , of course.

The man was about to 29 when another man came in. When this man saw the waiter, he put his hand on his 30 . That was 31 . In a few 32 , a large plate of meat and vegetable was brought in front of him.

Now you may 33 , people can not understand the 34 of signs so well as the language of 35 .

16. A. already B. never C. sometimes D. seldom

17. A. when B. while C. where D. which

18. A. know B. accept C. speak D. understand

19. A. shows B. explains C. introduces D. writes

20. A. Canadian B. English C. Japanese D. Chinese

21. A. shop B. restaurant C. school D. hotel

22. A. hand B. wrist C. foot D. finger

23. A. drink B. enjoy C. eat D. read

24. A. wine B. coffee C. milk D. tea

25. A. and B. but C. or D. nor

26. A. thirsty B. angry C. hungry D. tired

27. A. sweet B. different C. same D. other

28. A. meat B. fish C. chicken D. food

29. A. leave B. stand C. continue D. apologize

30. A. back B. head C. stomach D. mouth

31. A. enough B. good C. much D. right

32. A. hours B. minutes C. seconds D. days

33. A. judge B. see C. observe D. find

34. A. meaning B. speech C. purpose D. language

35. A. gestures B. action C. words D. body

三、阅读理解

One thing we do not know is how life began in the sea about 3 billion years ago.

Scientists believe that life started when some tiny substances (物质) met other substances under exactly the right conditions. In the warm waters of an ancient seacoast, a little mass (一小团物体) was formed of water, chemicals, and salts. This little mass had something which nothing on earth had before: the power to recreate itself to fit surrounding conditions. In a word: life.

If life could be created (创造) then, why does it not happen today? Part of the answer is that the world now is very different form what it was when it was new. Long ago there was no other life to destroy those very small bits of living matter. Now it is probable that they would be destroyed by bacteria (细菌).

The oldest age for life was once thought to be 1,900 million years. But in 1965, Dr Melvin Calvin of the University of California, and a group of scientists, found tiny substances 2,700 million years old. In Africa other tiny substances were found that were 3 billion years old. It was formerly (以前) thought that no life had existed on earth during this period of time.

Today we have thousands of different kinds of plant and animal life. Yet all of them have one thing in common: their origin (起源) in the sea.

36. Now people know .

A. exactly how life came into being

B. nothing about life

C. for sure life started 3 billion years ago

D. something about how and when life started

37. What were the most important things in the forming of life?

A. Water and chemicals.

B. Water, chemicals and the right conditions.

C. Chemicals and salts.

D. Water, chemicals, slats and the right conditions.

38. The underlined word “mass” in the second paragraph was .

A. nothing unusual compared with any other substance

B. something that could grow huge

C. something that could produce masses of its own kind

D. something could grow very fast

39. Life could be recreated only when .

A. it had no natural enemies

B. people know how to create it

C. the water was warm

D. there was bacteria

四、书面表达

一天，你和朋友去河边钓鱼，发现这条河污染严重，臭气熏天，只好扫兴而归。对此你写了一篇感想，并将该稿寄给了一家英文报社，希望能引起公众对环境污染的重视。要点如下：1、你是山东读者，名王宁，现在在济南第一中学读书；2、工厂向河里排放污水，有些市民向河中倾倒垃圾，致使河水污染，死鱼漂浮；散发臭气；3、各地河流污染日趋严重，后果不堪设想；

4、希望不久河水变清，污染得到有效阻止；

5、词数：100词左右；写信时间：9月25日。

选修7第3单元答案

语法聚焦

1—5 ADAAC 6—10 BBABA 11—15 ADCDB

单项选择：1—5 ABDAC 6—10 CBBCD 11—15 CCABC

完形填空：16—20 CADAB 21—25 BDCDA 26—30 CBDAC 31—35 ABBDC

阅读理解：36—39 DDCA

书面表达：

No. 1 Middle School, Jinan

Shandong

Sep. 25th

Dear editor,

We have to say that the pollution is now getting worse. The other day my friend and I went fishing on a riverside. We found the river so dirty and the smell so terrible that we could hardly stay there. We also found some rubbish and dead fish floating on the water.

It is all because a lot of factories always send waste water into it and some people throw rubbish into the river. If rivers all over the country were polluted like this, all the living things in the water would be killed and harm would be done to the people close to the river. We expect the river will be made clean again soon, and something should be done to stop anyone from polluting our surroundings.

Yours sincerely,

Wang Ning

二年级数学下册第三单元课堂综合练习题

二年级数学下册（北师大版）第三单元课堂综合练习题（2017春） （第三单元：生活中的大数） 班别：姓名：评分：等级： 一、填一填。（47分） 1、10个一百是（），1000里面有（）个十，4600里面有（）个百。 2、在数位顺序表中，从右起第二位是（）位，第五位是（）位，千 位是第（）位。 3、最大的三位数是（），最小的四位数是（），它们的和是（）。 4、由9个千、9个百、9个十和9个一组成的数是（），再添1个一是（）。 5、7887是（）位数，最高位是（）位，千位上的7表示（）个（）， 个位上的7表示（）个（）。 6、7452里面有（）个千、（）个百、（）个十和（）个一。 7、在6035,3952,4503和4469中，（）大于4000小于5000，且最接近4500。 8、用5、2、0、8这四个数字组成的四位数中，最大的四位数是（），最 小的四位数是（）。 9、找规律填空。 （1）6785，6885，（），（），7185，（）。 （2）8888，7777，6666，（），（）。 （3）468，（），（），471，（）。 （4）1002，（），（），（），（），997。 107个数是（）。 11里填上合适的数字。 43 ＞436 6 8 ＜622 05＜807 49＞449 250＞2 5 7529＜7 28 12、在○里填上“>”、“<”或“=”。 998○1000 5199○5099 892○982 1200○1020 二、看图写一写，读一读，画一画。（每空1分，共10分） 写作:（）写作:（）写作: 2017 读作:（）读作:（）读作:（） 写作：（） 读作：四千零二有( )个小正方体

人教版高中英语选修7 Unit5 Using language 优质教案

Unit5 Using Language 优质教案 教学目标 1．语言知识目标： a．重点词汇 parallel，abundant，govern，destination b．功能句式 We could... You might... It would be possible to... It isn't possible to... ...would be a perfect place for us. I don't think you'd enjoy... ...would probably suit us. It's out of the question. 2．语言能力目标 Through reading，enable the students to acquire detailed information about Peru. 3．情感态度目标 Help the students learn how to express likes and dislikes，probability and improbability with the target language. 重点难点 教学重点： Introduce briefly and properly the country—Peru. 教学难点： Talk about tours in and around Cuzco with functional items given. 教学准备 A slide projector and a tape recorder. Let students surf the Internet to get information about Peru. 教学过程 1Lead－in Ask the students something about their travelling abroad.(What places would you like

人教英语选修7同步测试详解模块综合 95

1.Linda worked for the Minnesota Manufacturing and Mining Company,______ as 3M. A.knowing B.known C.being known D.to be known 解析：known as “以……而著称”，过去分词短语作定语，相当于一个非限制性定语从句which is known as 3M。 答案：B 题干评注：非谓语动词 问题评注：在句子中充当除谓语以外的句子成分的动词形式叫做非谓语动词。非谓语动词分为三种形式:不定式，动名词，和分词。 2.The pilot asked all the passengers on board to remain ______ as the plane was making a landing. A.seat B.seating C.seated D.to be seating 解析：此句中的remain为连系动词，后跟过去分词作表语，构成remain/be seated结构。 答案：C 题干评注：非谓语动词 问题评注：在句子中充当除谓语以外的句子成分的动词形式叫做非谓语动词。非谓语动词分为三种形式:不定式，动名词，和分词。 3.You can give the books to ______ need them most. A.anyone you think B.whoever you think C.you think who D.those that 解析：从语法角度可以排除A、C两项，从主谓一致可排除B项，因为you think 为插入语，宾语从句中动词need不应该为复数。 答案：D 题干评注：宾语从句 问题评注：名词性从句包括：主语从句、表语从句、宾语从句和同位语从句。引导名词性从句的连词有：连词：that, whether, if（这三个词都不作从句的成分，同时，that无含义，而whether和if都表“是否”）；B.疑问代词：who, whom, whose, what, which；疑问副词：when, where, why, how 4.Of all the students ______ on the blackboard,Lily got the best grades in the exams. A.listing B.being listed C.listed D.to list 解析：此题考查过去分词在句中作定语的用法。list和students间存在逻辑上的动宾关系，表示“黑板上已经列出的学生当中”。 答案：C 题干评注：非谓语动词 问题评注：在句子中充当除谓语以外的句子成分的动词形式叫做非谓语动词。非谓语动词分为三种形式:不定式，动名词，和分词。过去分词在句中作定语 5.There is no point ______. A.working hard B.in studying hard C.on work hard D.study hard 解析：there is no point in doing sth.为固定搭配。 答案：B 题干评注：词语辨析 问题评注：词语辨析要求对所给的一组单词或短语进行比较辨别。做这类题时，要从词语的

(完整)高中化学选修四第三章测试题

高中化学选修4第三章单元测试题 （时间：100分钟共100分） 相对原子质量：H 1 O 16 Na 23 S 32 K 39 Ag 108 I 127 Ba 137 第I卷（选择题共50分） 一．选择题（本题包括10小题，每小题2分，共20分。每小题只有一个 ．．．．选项符合题意） 1、在pH＝1的无色溶液中能大量共存的离子组是 A、NH4＋.、Mg2+、SO42－、Cl- B.Ba2+、K+、OH-、NO3－ C. Al3+、Cu2+、SO42－、Cl- D.Na+、Ca2+、Cl-、AlO2－ 2、纯水在20℃和80℃时的pH A．前者大B．后者大C．相等D．无法确定 3、能正确表示下列反应的离子方程式是 A．铁跟盐酸反应：2Fe + 6H+＝2Fe3+ + 3H2↑ B．磷酸二氢钙溶液跟氢氧化钙反应：H2PO4—+ 2OH—＝PO43—+ 2H2O C．碳酸钙跟醋酸反应：CaCO3 + 2CH3COOH＝Ca2+ + 2CH3COO—+ H2O + CO2↑ D．铜片跟稀硝酸反应：Cu + NO3－+ 4H+＝Cu2＋+ NO↑+ 2H2O 4、用已知浓度的NaOH溶液滴定待测浓度的盐酸（盐酸置于锥形瓶中），以下操作会造成所测盐酸溶液浓度偏低的是 A．酸式滴定管未用待装溶液润洗 B．碱式滴定管未用待装溶液润洗 C．锥形瓶未用待装溶液润洗 D．在滴定前滴定管尖嘴部分有气泡，滴定后气泡消失 5、下列物质的水溶液能导电，但属于非电解质的是 A.CH3CH2COOH B.Cl2 C.NH4HCO3 D.SO2 6、将0.l mol·L-1醋酸溶液加水稀释，下列说法正确的是 A．溶液中c（H+）和c（OH-）都减小B．溶液中c（H+）增大 C．醋酸电离平衡向左移动D．溶液的pH增大 7、从下列现象可以判断某酸是强酸的是 A．加热该酸至沸腾也不分解 B．该酸可以与石灰石反应放出CO2 C．该酸可以把Al(OH)3沉淀溶解 D．该酸浓度为0.1 mol·L-1时的pH为1 8、常温下某溶液中由水电离产生的[H+]=1×10-5mol·L-1，则下列叙述正确的是 A．PH值为5 B．一定是酸溶液 C．可能是强酸的酸式盐溶液D．PH值可能为9

人教版高中英语选修7同步检测Unit 4 Sharing第1课时

Unit 4 第1课时 Ⅰ.单词拼写 1．In this quiet way, the first________(两星期)of her visit soon passed away. 2．Much new knowledge is________(遥远的)from the immediate interest of the ordinary person. 3．There is an active demand for________(作口译的人)during the trade fair. 4．An officer climbed on to the________(平台)and spoke to him. 5．I can not understand so abstract c________. 6．What things do you do w________or monthly, but not every day? 7．He tried to a________his daily plan to leave time for everything. 8．What you said is not r________to the matter in hand. 9．Do you know how a(n)________(宇航员)flies in a spacecraft? 10．The rising sun is especially beautiful to look at from this________(角度)． 11．They celebrate their wedding a________annually. 12．The government calls on the youth to d________their blood voluntarily. 13．The purposes of the United Nations are to maintain international peace and s________. 14．The quickest way to sew is with a s________machine. 15．He gave his son some money for the p________of his school books. 16．Getting the balance between two________(政治的)forces involves a lot of arts. 17．The children's ________(门诊部)was open during school hours. 18．Having lost his job, he'd begun to interest himself in local________(志愿的)work. 19．It is quite necessary to know the age________(分布)in the population. 20．All the machines are listed in the________(目录)． 答案：1.fortnight 2.remote 3.interpreter 4.platform 5．concept 6.weekly7.adjust8.relevant9.astronaut 10．angle11.anniversary12.donate13.security 14．sewing15.purchase16.political17.clinic 18．voluntary19.distribution20.catalogue Ⅱ.完形填空 阅读下面短文，理解大意，从题中(1～20)所给的A、B、C、D四个选项中选出一个最佳答案。 This story is about a 92-year-old proud lady. She is fully__1__each morning by eight, with her hair fashionable coifed(戴头巾)and makeup perfectly applied，__2__she is legally blind. She is moving to a nursing home today. Her husband of 70 years old recently__3__，making the move necessary. After many hours of waiting__4__in the lobby of the nursing home, she smiled sweetly when__5__her room was ready. As she directed her walker to the elevator, I provided a visual__6__of her tiny room, including the eyelet(圆孔眼)sheets that had been hung on her window.“I__7__it，”she stated with the enthusiasm of an eight-year-old who had just been__8__with a new puppy(小狗)． “Mrs Jones, you haven't seen the__9__yet. Just wait.”“That doesn't have anything to do with it，”she replied.“__10__is something you decide on ahead of time. Whether I like my room or not doesn't__11__how the furniture is arranged. It's__12__I arrange my mind. I already__13__to love it. It's a decision I make every morning when I wake up.” “I have a__14__. I can spend the day in bed listing the difficulty I have with the parts of my body that no longer work, or get out of bed and be__15__for the ones that do. Each day is a__16__，and as long as my eyes open I'll focus on the new day and all the happy__17__I've stored away...just for this time in my life.” “Old age is__18__a bank account...you withdraw from what you've put in. So, my advice to

人教版高中化学选修4第三章测试题(经典含解析)

人教版选修4第三章《水溶液中的离子平衡》测试题（A 卷） （时间45分钟，满分100分） 一、选择题（1--6只有．．1．个．选项符合题意，7-10有2．个．选项符合题意，每小题5分，共50分。） 1． 用水稀释0.1mol/L 氨水时，溶液中随着水量的增加而减小的是（ ） A ．) O H NH () OH (23?-c c B ． ) OH ()O H NH (23-?c c C ．c (H +)和c (OH -)的乘积 D ．OH -的物质的量 2． 某学生的实验报告所列出的下列数据中合理的是 A ．用10mL 量筒量取7.13mL 稀盐酸 B ．用托盘天平称量25.20g NaCl C ．用广泛pH 试纸测得某溶液的pH 为2.3 D ．用25mL 滴定管做中和滴定时，用去某浓度的碱溶液21.70mL 3． 下列溶液加热蒸干后，能析出溶质固体的是 A ．AlCl 3 B ．KHCO 3 C ．Fe 2(SO 4)3 D ．NH 4HCO 3 4． 一定量的盐酸跟过量的铁粉反应时，为了减缓反应速度，且不影响生成氢气的总量，可向盐酸中加入适量的 ①NaOH 固体 ②H 2O ③NH 4Cl 固体 ④CH 3COONa 固体 ⑤NaNO 3固体 ⑥KCl 溶液 A ．②④⑥ B ．①② C ．②③⑤ D ．②④⑤⑥ 5． 在25℃时，100mL 0.4mol/L 的盐酸与等体积0.6mol/L 的氢氧化钠溶液混合后，溶液的pH 值为 A ．6 B ．5 C ．12 D ．13 6．下列方程式书写正确的是（ ） A.HCO 3－在水溶液中的电离方程式：HCO 3－＋H 2O H 3O ＋＋CO 32－ B.H 2SO 3的电离方程式H 2SO 32H ＋＋SO 32－ C .CO 32－的水解方程式：CO 32－＋2H 2O H 2CO 3＋2OH － D.CaCO 3的电离方程式：CaCO 3 Ca 2+＋CO 32－ 7. 氢氰酸（HCN ）的下列性质中，可以证明它是弱电解质的是 （ ） A ．1mol/L 该酸溶液的pH 约为3 B ．HCN 易溶于水 C ．10mL 1mol/L HCN 恰好与10mL 1mol/L NaOH 溶液完全反应 D ．在相同条件下，HCN 溶液的导电性比一元强酸溶液的弱 8..下列溶液中有关物质的量浓度关系正确的是（ ） A ．pH=2的HA 溶液与pH=12的MOH 溶液任意比混合： c (H +) + c (M +) == c (OH -) + c (A -) B ．pH 相等的CH 3COONa 、NaOH 和Na 2CO 3三种溶液： c (NaOH)＜c (CH 3COONa)＜c (Na 2CO 3) C ．物质的量浓度相等CH 3COOH 和CH 3COONa 溶液等体积混合： c (CH 3COO -) +2c (OH -) == 2c (H +) + c (CH 3COOH) D ．0.1mol ·L -1的NaHA 溶液，其pH=4：c (HA -)＞c (H +)＞c (H 2A)＞c (A 2-) 9. 盐酸、醋酸、纯碱和碳酸氢钠是生活中常见的物质。下列表述正确的是（ ） A ．在NaHCO 3溶液中加入与其等物质的量的NaOH ，溶液中的阴离子只有CO - 23和OH -

2020年五年级下册数学第三单元综合训练题

2020年五年级下册数学第三单元综合训练题 一、填空 1、某天北京的气温是—2℃，全天温差是9℃，当天的最低气温是( )℃。 2、某天北京的气温是3℃，最低温是—8℃，当天的温差是( )℃。 3、某天北京的气温是—2℃，最低温是—9℃，当天的温差是( )℃。 4、丫丫从学校出发先向西走了30米，又向东走了50米，超市在 学校的( )方向( )米处。 5、在某种味精的袋上标有“200±5克”，说明这袋味精的重量不低于( )，不超过( )。 6、电梯从1层上升到7层，然后有下降了3层，现在电梯在第( )层。 7、在—5、+32、—0.7、8、—6、3、0、2.5这些数中，正数有( )个，正整数有( )个，负数有( )个，负整数有( )，自然数有( )个， 整数有( )个。 8、向东走—5米表示向( )走( )米。 9、如果超市在学校的南偏东60°方向上，也能够说成超市在学校的( )偏( )( )度方向上。 10、如果图书馆在教学楼的北偏西30°方向上，那么教学楼在图 书馆的( )偏( )( )度方向上。 11、方程27—3x=6的解是( )。 12、两个连续的自然数的和是43，最小的数是( )。

二、判断 1、整数包括正整数和负整数。( ) 2、方程都是等式，等式也是方程。( ) 3、38 ×4÷38 ×4=1 ( ) 4、等式两边同时加上或减去同一个数，等式仍然成立。( ) 5、超市在学校的北偏东45°方向上，也能够说超市在学校的东偏北45°方向上。( ) 三、选择 1、方程2x=1的解与( )的解相同。 A 2X—1 B 4x=2 C x÷2 2、一个三角形的底是x米，高6米，面积24平方米，( )。 A x= 4 B x=8 C x=6 3、如果2x+1=9，那么6x+1.5x+1等于( ) A 30 B 75 C 31 4、姐姐有24枚邮票，比弟弟的3倍少9枚，弟弟有多少枚?列方程为( ) A 3x—9=24 B 3x+9=24 C 24—3x=9 四、解方程 4.5+3x=16.5 42x+25x=134 54—6x=30 84—4x=24 2x—97=34.2 4.5×6+4x=41 49—4x=17 1.6x=6.4 18x=90 五、列式计算

高中英语人教版选修7 同步练习 Unit 3

Unit 3 Under the sea 同步练习 1. I thought, at the time, that this was just a story but then I ___________ (目睹) it with my own eyes many times. 2. The advantage of using ___________ (住所) agencies is that you will have access to a large number of apartments. 3. “Help me!” she ___________ (叫喊 ) at the top of her voice. 4. Other killers are stopping the whale ___________ (潜水) or fleeing. 5. Last time they ___________ (力劝) me to eat the strange food. 6. This T-shirt is made of high quality ____________ (纯的) cotton. 7. Isabelle’s body is unable to produce healthy red blood ____________ (细胞). 8. As we set out, I was shocked at how ____________ (狭窄的) the path was. 9. I explored small caves and shelves with my underwater ____________ (手电筒). 1. Set yourself targets that you can reasonably hope to achieve. (tasks / goals) 2. It was like discovering a whole new dimension of life. (aspect / meaning) 3. He always keeps his desk neat. (tidy / empty) 4. It was a simple but tasty meal. (excellent / delicious) 5. The boy understood the risk of climbing the giant mountain. (high / huge) 6. He tried to leap over the wall but did not succeed. (jump / climb) 1. If a net becomes free-floating, it is moved by the tides all over the ocean. ____________ 2. The storm moved offshore. ____________ 3. She is wearing a vivid red coat. ____________

人教版高中数学选修2-1第三章单元测试(二)- Word版含答案

2018-2019学年选修2-1第三章训练卷 空间向量与立体几何（二） 注意事项： 1．答题前，先将自己的姓名、准考证号填写在试题卷和答题卡上，并将准考证号条形码粘贴在答题卡上的指定位置。 2．选择题的作答：每小题选出答案后，用2B 铅笔把答题卡上对应题目的答案标号涂黑，写在试题卷、草稿纸和答题卡上的非答题区域均无效。 3．非选择题的作答：用签字笔直接答在答题卡上对应的答题区域内。写在试题卷、草稿纸和答题卡上的非答题区域均无效。 4．考试结束后，请将本试题卷和答题卡一并上交。 一、选择题(本大题共12个小题，每小题5分，共60分，在每小题给出的四个选项中，只有一项是符合题目要求的) 1．已知三棱锥O ABC -，点M ，N 分别为AB ，OC 的中点，且OA =uu v a ，OB =uu u v b ，OC =uuu v c ，用a ，b ，c 表示MN uuu v ，则MN uuu v 等于（ ） A ．()1 2 +-b c a B ．()1 2 +-a b c C ． ()1 2 -+a b c D ． ()1 2 --c a b 2．已知()cos ,1,sin αα=a 、()sin ,1,cos αα=b ，且∥a b ，则向量+a b 与-a b 的夹角是（ ） A ．90° B ．60° C ．30° D ．0° 3．已知A 、B 、C 三点的坐标分别为()4,1,3A 、()2,5,1B -、()3,7,C λ，若AB ⊥u u u v AC uuu v ， 则λ等于（ ） A ．28 B ．28- C ．14 D ．14- 4．若向量{},,a b c 是空间的一个基底，则一定可以与向量2=+p a b ，2=-q a b 构成空间的另一个基底的向量是（ ） A ．a B ．b C ．c D ．+a b 5．在空间直角坐标系O xyz -中，已知()2,0,0A 、()2,2,0B 、()0,2,0C 、(D ，若1S 、2S 、3S 分别表示三棱锥D ABC -在xOy 、yOz 、zOx 坐标平面上的正投影图形的面积，则（ ） A ．123S S S =≠ B ．231S S S =≠ C ．132S S S =≠ D ．123S S S == 6．已知a 、b 是两异面直线，A 、B a ∈，C 、D b ∈，AC b ⊥，BD b ⊥且2AB =，1CD =，则直线a 、b 所成的角为（ ） A ．30° B ．60° C ．90° D ．45° 7．如图所示，在平行六面体1111ABCD A B C D -中，点E 为上底面对角线11A C 的中点，若1BE AA xAB y AD =++uu u v uuu v uu u v uuu v ，则（ ） A ．12x =-，1 2 y = B ．12x =，1 2 y =- C ．12x =-，1 2 y =- D ．12x = ，1 2y = 8．已知()1,1,2A -、()1,0,1B -，设D 在直线AB 上，且2AD DB =u u u v u u u v ， 设C 1,,13λλλ?? ++ ???，若CD AB ⊥，则λ的值为（ ） A ．116 B ．116- C ．12 D ．1 3 此 卷 只装 订 不密 封 班级 姓名 准考证号 考场号 座位号

四年级数学下册第三单元综合提优训练_题型归纳

四年级数学下册第三单元综合提优训练_题型归纳 第三单元综合提优训练 一、填空题。（每空1分，共22分） 1、4.5×0.4表示；2.8×1.2表示。 2、4.38千米=米80千克=吨 3、2.96×4.39的积有位小数，保留两位小数是。 4、9.97÷3.21的商是，余数是。 5、在下面的○里填上“﹥”“﹤”或“=”。 43.6÷0.9843.60.97×0.970.97 2.75×0.180.182.45÷1.032.45 6、一个三位小数的近似值是5.70，这个三位数最大是，最小是。 7、一个因数扩大100倍，另一个因数缩小10倍，积会。 8、4.3535……是循环小数，可以简写成，循环节是， 0.02828……是循环小数，循环节是，保留两位小数是。 9、把3.14、3.14159……，3.15，3.14，3.144按从大到小的顺序排列起来是： 二、判断题。（每题1分，共6分） 1、一个数的4.7倍一定大于这个数。（） 2、496÷0.125×8=496÷1=496（） 3、0.96去掉小数点，这个数比原来的数多99倍。（） 4、0.3603603……的循环节是360。（） 5、无限小数比限小数大。（）

6、近似数5.0和5的大小相等，精确度不一样。（） 三、选择题。（每题1分，共6分） 1、6.8÷2.3的商保留两位小数约是（）。 A、2.95 B、2.60 C、2.96 2、两个数相除的商是4.5，把被除数和除数同时扩大5倍，商是（）。 A、13.5 B、1.5 C、4.5 3、某商场按原价卖铅笔，每枝铅笔0.15元，小青买7枝应付（）元。 A、1.05 B、1.085 C、1.09 4、0.15除0.25，商是1.6，余数是（）。 A、10 B、1 C、0.1 D、0.01 5、一个小数的小数点先向右移动三位，再向左移动两位，这个小数（）。 A、比原来缩小10倍 B、比原来扩大10倍 C、大小不变 6、下面各数中是有限小数的有（），是无限小数的有（），是循环小数的有（）。 A、4.4444 B、0.78782782…… C、8.203302030…… D、2.905 E、4.3696969 F、2.045 四、列竖式计算。（每题2分，共6分） 220.5÷310.45×0.4970.6÷22 （商精确到百分位。）（得数保留三位小数。）（商用循环小数表示。） 五、计算下面各题，能简算的要简算。（每题3分，共18分）

人教版高中英语选修八unit5-词汇讲解

一、 date back to 英[de?t] 美[de?t] 追溯到…… 常见用法： 1． 动词+～ advance the date提前日期 bear the date注明日期 break the date不遵守约定 bring forward the date提前日期 2． 形容词+～ closing date截止日期 early date早期 fixed date固定的日期 future date将来的日期 3. 介词+～ from that date从那时起 on a certain date在某一日期 out of date过时的

to date到目前为止 例句： All the objects are from the same excavation site in Sanxingdui and can be dated back to between 3,000 and 5,000 years ago. 所有的物品都来自于三星堆的一个挖掘点，时间可以追溯到3000到5000年前。 date back to＝date from 因追溯是从现在算起指向过去，所以这个短语常用一般现在时。 This custom dates back to the 16th century. 这风俗起源于16世纪。 This is an old building dating back to/dating from the 16th century. 这是一栋追溯至16世纪的古老建筑物。 练习： 1.英译汉My interest in stamp collecting dates back to/from my schooldays. 2.Every day a number of tourists take pictures in front of the tower，which ________ as early as 800 years ago. A．dates back to B．is dated back C．dates back from D．was dated from 答案：

人教版高中英语选修七Unit2同步精选及答案

人教新课标英语选修7 Unit2同步精选及答案 Unit Two Robots I．语法填空 Larry Belmont worked____1_____ a company that made robots. Recently it had begun________2______ (experiment) with a household robot. It was going to be _____3_______ (test) out by Larry’s wife, Claire. Claire didn’t want the robot in_____4_____ house, especially as her husband would be ____5____ (absence) for three weeks, _____6_____ Larry persuaded her that the robot wouldn’t harm her or allow her to be harmed. It would be a bonus. _____7______, when she first saw the robot, she felt _____8_____(alarm). His name was Tony and he seemed____9_____ (much) like a human than a machine. He was tall and handsome with smooth hair and a deep voice although his ______10_______(face) expression never changed. 1.____________ 2.____________ 3.___________ 4.___________ 5.___________ 6.____________ 7.____________ 8.___________ 9.___________ 10___________ II. 用所给词的词组适当形式填空 1. The moment he got up this morning, someone_________（ring). 2.Tony would have to be rebuilt because you cannot have women _________________(fall) machines. 3. I suggested to him that the new machines ______________(test) before going into production. 4. You shouldn’t have __________(leave)in the mountains, it w as very dangerous for her. 5. He heard a voice but when he_____________(turn), he saw nobody. 6. But for much of his working life, he has ___ （set)his enthusiasm for physics to devote himself to a career in administration. 7. Some members of the House complain that their vote ____(favour) the system could cost them their jobs in November. 8. You _________(bound) be disappointed if you hope to go to college without hard work. 9. My thought on improving the financial condition of the company ________ (similar)the boss’s.

人教版高中化学选修四第三章《水溶液中的离子平衡》测试试题(含答案)

人教版高中化学选修四第三章《水溶液中的离子平衡》测试试题（含答案）第三章《水溶液中的离子平衡》测试题 一、单选题（每小题只有一个正确答案） 1．关于强弱电解质及非电解质的组合完全正确的是( ) A B C D 强电解质NaCl H2SO4CaCO3HNO3 弱电解质HF BaSO4HClO NaHCO3 非电解质Cl2CS2C2H5OH SO2 A．A B．B C．C D．D 2．25℃时，水的电离可达到平衡：H2O H+＋OH－△H＞0，下列叙述正确的是( ) A．向水中加入少量固体硫酸氢钠，c(H+)增大，K w不变 B．向水中加入稀氨水，平衡逆向移动，c(OH－)降低 C．向水中加入少量固体CH3COONa，平衡逆向移动，c(H+)降低 D．将水加热，K w 增大，pH不变 3．向 10 mL pH=12的某碱溶液中加入10 mL pH=2的盐酸，充分反应后滴入酚酞试液，溶液变红，则此碱一定是( ) A．一元强碱 B．多元强碱 C．弱碱 D．任何强碱 4．下列说法正确的是（） A．在弱酸HA的溶液中存在三个平衡，HA的电离平衡，H2O的电离平衡，A-的水解平衡B．可利用反应2CO(g)=2C(s)+O2(g) (ΔH＞0、ΔS≤0)来消除CO污染 C．除去Cu粉中混有的CuO，可将混合物加入稀硝酸中，充分反应后过滤、洗涤 D．根据过渡态理论，反应物转化为生成物的过程中要经过能量较高的状态 5．判断下列化学基本概念的依据不正确的是( ) A．溶液的酸碱性：溶液中c(H+)和c(OH－)的相对大小 B．强弱电解质：溶液的导电能力大小 C．离子化合物：化合物中是否含离子键 D．氧化还原反应：元素化合价是否变化 6．下列离子方程式正确的是( ) A．NaHS溶于水: NaHS ＝ Na+ + H+ + S2－ B．Al(OH)3电离: H2O+AlO2－+H+＝Al(OH)3＝Al3++3OH－ 1/ 11

(人教版)高中英语选修7(全册)课时同步练习+单元测试卷汇总(打印版)

（人教版）高中英语选修7（全册）课时同步练习+单元测试 卷汇总（打印版） 1.1 课时作业 Ⅰ.单句语法填空 1．Traditionally, Chinese people cut ________ the Chinese characters Double Happiness and stick them onto walls or doors for weddings. 2．—I think I'll stay home and listen to my favorite music. —Suit ________(you). I am leaving with my friends for the wonderful movie. 3．We're all ready to put it into operation; in ________ words, we're going to take action as soon as possible. 4．The football match lasted two hours, which made all the players ________ of breath. 5．As his disease ________(disable) him, Hawking has to sit in his wheelchair and speak through a computer. 6．Grey as well as his two companions ________(be) to leave ________ Paris tomorrow. 7．When you go to a foreign country, you must adapt yourself ________ new manners and customs.

五年级下册语文第三单元综合训练题

五年级下册语文第三单元综合训练题 一、基础知识(37分) 1.看拼音，用你最满意的字体写词语(10分) yuānbó zōngzhǐ xùrì zhēndì shùnjiān ()()()()() áoyóu bùlǚ yúlè pāishè qīnqi ()()()()() 2.成语填空(11分) (1)补充成语难不倒我。(5分) 至()无上()风()雨金()献瑞质()无()一()如洗()然无()转()即()心()神()数不()数()马()花 (2)中国人是龙的传人，耳闻心记，你一定知道一些带有“龙”的成语和寓言吧，请你在括号里填入一个字，构成成语。在横线上填写关于龙的寓言。(6分) ①龙()()跃()龙()睛()()龙()()()()龙 ②寓言： 3.火眼金睛，辨析词语组词(6分) 峪()浴()趟()倘()遨()傲()裁()载()糊()湖()旨()指() 4.按要求写句子(4分) (1)花，理应呈送给凯旋的英雄，难道也要献给黯淡无光的失败者?(改为陈述句)

(2)海浪冲上来，又害羞似的退回去。(仿照修辞手法写句子) (3)我想念王老师。(扩句) (4)千家万户都高高兴兴地在傍晚时分贴上了象征吉祥幸福的春联。(缩句) 5.下面的破折号有何作用?请选择(6分) A.话题转移 B.解释说明 C.声音延长 (1)我发现了一块绿洲——小镇上兴办的文化站有几百册图书!() (2)每个窗子里都透出灯光来，街上飘着一股烤鹅的香味，因为这是大年夜——她可忘不了这个。() (3)那部书里着力描写的人物，如林冲——林教头风雪山神庙一回，看了使我气愤填胸!() 一天，有位年轻的母亲抱着一个孩子在门口探头探脑地张望，祖母又发出邀请，可女人摇摇手，说出一番话来。祖母这才注意到孩子生了一头疮，她丝丝地吸着冷气，好像要代那个小女孩(接受忍受)痛苦。看了一会儿，她醒过神来，赶快拿一把剪刀，走到荷花缸边，“咔”一声剪下最大的荷叶。 荷叶是夏日里清凉的东西。祖母以往每年也都要分送几支给左邻右舍泡茶喝。这一年，老邻居们是喝不上荷叶茶了。每隔几日，就要给那个孩子剪一支荷叶，荷花缸里的荷叶也就越来越少。不过，小孩子的疮倒是确实一天天好起来。 家里人都(痛惜可惜)那一缸好荷叶，像这样剪下去，今年别