浙江萧山中学2019届高三10月阶段性测试 英语

浙江萧山中学2019届高三10月阶段性测试 英语
浙江萧山中学2019届高三10月阶段性测试 英语

浙江萧山中学2019届高三10月阶段性测试

英语试题

第一部分选择题部分(共80分)

请将选择题部分的答案正确填涂在考试通用答题卷上。

第一节单项填空(共20小题,每小题0.5分,满分10分)

1.______ history of the Qing Dynasty is _____ history of suffering, also one of being bullied and invaded (欺侮和侵略).

A.不填; a B.The; the C.The; a D.The; 不填

2.---Have you received Jack’s plan?

---Yes, but I don’t think his plan is _____.

A.worth being considered B.worthy to be considered

C.worthy of considering D.worth to be considered

3.Mr.Smith was very glad _____ as the manager of the company.

A.being appointed B.having appointed

C.to have appointed D.to have been appointed

4.―Changes should be made in the prison for the conditions there are _____,‖ said the reporter.A.wonderful B.awful C.elegant D.awesome

5.The scientists are urging that the chemical _____.

A.is banned B.should ban C.be banned D.must be banned 6.I’m not a teacher in this school.I _____ until a new teacher arrives.

A.am just helping out B.could just help out

C.just help out D.have just helped out

7.The person sitting opposite _____ Mr.Smith is our new manager.

A.to B./ C.with D.of

8.The little kitty saw itself _____ in the water and felt puzzled.

A.reflected B.reflecting C.reflect D.reflects

9.---How did you find your trip to America, John?

---_________.

A.I went there by plane B.Tom showed me around

C.Well, it depends D.Oh, wonderful, indeed

10.When a friend gave Tom a ticket he ________ to the game.

A.couldn’t help but go B.couldn’t help but going

C.can’t help but to go D.can’t help but going

11.This company was the first _____ portable radios as well as cassette tape recorders in the world.A.producing B.to produce C.having produced D.produced

12.Bear in _____ that tomorrow is our dear mother’s birthday.

A.mind B.head C.memory D.heart

13.It was in such a good place _____ everyone wanted to go and visit _____ I came across the old lady.A.that, that B.where, as C.as, that D.as, as

14.She will stop showing off if no notice _____ of her.

A.is taken B.takes C.will be taken D.has taken

15.To keep healthy, most retired old people _____ jogging as a regular form of exercise.A.take up B.make up C.carry out D.hold out

16.He always dreams of ______ a chance for him to go abroad for further study.

A.there being B.there to be C.there is D.being

17.We had planned to finish the work before dark, but the heavy rain _____ us _____.A.build, up B.put, up C.bake, up D.hold, up

18.People are advised to be _____ towards the health concerns of their dear ones while burning firecrackers to celebrate the festival, for they contain harmful chemicals.

A.accessible B.aware C.cautious D.sensitive 19.Sometimes, the entrance tickets are _____ free of charge from the university.

A.available B.valuable C.imaginable D.accessible

20.–-- I’m afraid you’d better go to the seaside and enjoy a good holiday.

---I can’t follow your advice, ____, thank you very much.

A.instead B.therefore C.nevertheless D.besides

第二节完形填空(共20小题;每小题1分,满分20分)

请认真阅读下面短文,从短文后各题所给的A、B、C、D四个选项中,选出最佳选项,并在答题卡上将该项涂黑。

We often talk about ourselves as if we have permanent genetic defects (缺陷)that can never be changed.―I’m impatient.‖ ―I’m always behind.‖ ―I always put th ings 21 !‖ You’ve surely heard them.Maybe you’ve used them to describe 22 .

These comments may come from stories about us that have been 23 for years—often from 24 childhood.These stories may have no 25 in fact.But they can set low expectations for us.As a child, my mother said to me, ―Marshall, you have no mechanical (操作机械的)skills, and you will never have any mechanical skills for the rest of your life.‖ How did these expectations 26 my development? I was never 27 to work on cars or be around 28 .When I was 18, I took the US Army’s Mechanical Aptitude Test.My scores were in the bottom for the entire nation!

Six years later, 29 , I was at California University, working on my doctor’s degree.One of my professors, Dr.Bob Tann baum, asked me to write down things I did well and things I couldn’t do.On the positive side, I 30 down, ―research, writing, analysis, and speaking.‖ On the 31 side, I wrote, ―I have no mechanical skills.‖

Bob asked me how I knew I had no mechanical skills.I explained my life 32 and told him about my 33 performance on the Army test.Bob then asked, ―34 is it that you can solve 35 mathematical problems, but you can’t solve simple mechanical problems?‖

Suddenly I realized that I didn’t 36 from some sort of genetic defect.I was just living out expectations that I had chosen to 37 .At that point, it wasn’t just my family and friends who had been 38 my belief that I was mechanically hopeless.And it wasn’t just the Army test, e ither.I was the one who kept telling myself, ―You can’t do this!‖ I realized that as long as I kept saying that, it was going to

remain true.39 , if we don’t treat ourselves as if we have incurable genetic defects, we can do well in almost 40 we choose.

21.A.away B.off C.up D.down

22.A.them B.myself C.yourself D.others

23.A.said B.spoken C.spread D.repeated

24.A.as long as B.as far back as C.as well as D.as much as 25.A.basis B.plot C.cause D.meaning 26.A.lead B.improve C.affect D.change 27.A.encouraged B.demanded C.hoped D.agreed 28.A.means B.tools C.facilities D.hammers 29.A.therefore B.somehow C.instead D.however 30.A.settled B.turned C.took D.got

31.A.passive B.active C.negative D.subjective 32.A.experiences B.trips C.roads D.paths 33.A.unexpected B.poor C.excellent D.average 34.A.When B.What C.How D.Why 35.A.complex B.advanced C.common D.primary 36.A.arise B.separate C.suffer D.come 37.A.believe B.suspect C.adopt D.receive 38.A.weakening B.strengthening C.abandoning D.accepting

39.A.As a result B.At the same time C.In addition D.On the contrary 40.A.anything B.something C.nothing D.all

第三节.阅读理解(每小题2分,共50分)

阅读下列短文,从每题所给的四个选项(A, B, C和D)中选出最佳选项。

A

A year ago August, Dave Fuss lost his job driving a truck for a small company in west Michigan.His wife, Gerrie, was still working in the local school cafeteria, but work for Dave was scarce, and the price of everything was rising.The Fusses were at risk of joining the millions of Americans who have lost their homes in recent years.Then Dave and Gerrie received a timely gift—$7,000,a legacy (遗产)form their neighbors Ish and Arlene Hatch, who died in an accident .―It really made a difference when we were going under financially.‖ says Dave.

But the Fusses weren’t the only folks in Alto and the neighboring town of Lowell to receive unexpected legacy from the Hatches.Dozens of other families were touched by the Hatches’ generosity.In some cases, it was a few thousand dollars ; in other, it was more than $100,000.

It surprised nearly everyone that the Hatches had so much money, more than $3 million—they were an elderly couple who lived in an old house on what was left of the family farm .

Children of the Great Depression, Ish and Arlene were known for their habit of saving.They thrived on (喜欢)comparison shopping and would routinely go from store to store, checking prices before making a new purchase .

Through the years, the Hatches paid for local children to attend summer camp when their parents couldn’t afford it.―Ish and Arlene never asked whether you needed anything,‖ says their friend Sand Van Weelden, ―They could see things they could do to make you happier, and they would do them.

Even more extraordinary was that the Hatches had their farmland distributed.It was the Hatches’ wish that their legacy—a legacy of kindness as much as one of dollars and cents —should enrich the whole community and Ish and Arlene Hatch’s story.

Neighbors helping neighbors ——that was Ish and Arlene Hatch’s story.

41.According go the text, the Fusses_______________.

A.were employed by a truck company B.were in financial difficulty

C.worked in a school cafeteria D.lost their home

42.Which of the following is true of the Hatches?

A.They had their children during the Great Depression.

B.They left the family farm to live in an old house.

C.They gave away their possessions to their neighbors.

D.They helped their neighbors to find jobs.

43.Why would the Hatches routinely go from store?

A.They decided to open a store.B.They wanted to save money.

C.They couldn’t afford expensive things.D.They wanted to buy gifts for local kids.44.According to Sand Van Weelden, the Hatches were_________.

A.understanding B.optimistic C.childlike D.curious

45.What can we learn from the text?

A.The community of Alto was poor.

B.The summer camp was attractive to the parents.

C.Sandy Van Weelden got a legacy form the Hatches.

D.The Hatches would like the neighbors to follow their example.

B

How could we possibly think that keeping animals in cages in unnatural environments-mostly for entertainment purposes-is fair and respectful?

Zoo officials say they are concerned about animals.How ever, most zoos remain ―collections‖ of interesting ―things‖ rather than protective habitats (栖息地).Zoos teach people that it is acceptable to keep animals bored, lonely, and far from their natural bones.

Zoos claim (声称)to educate people and save endangered species(物种), but visitors leave zoos without having learned anything meaningful about the animals’ natural behavior, intelligence, or beauty.Zoos keep animals in small spaces or cages, and most signs only mention the species’ name, diet, and natural range(分布区).The animals’ normal behavior is seldom noticed because zoos don’t usually take care of the animals’ natural needs.

The animals are kept together in small spaces, with no privacy and little opportunity for mental and physical exercise.These results in unusual and self-destructive behavior called zoophobia.A worldwide study of zoos found that zoophobia is common among animals kept in small spaces or cages.Another study showed that elephants spend 22 percent of their time making repeated head movements or biting cage bars, and bears spend 30 percent of their time walking back and forth, a sign of unhappiness and pain.Furthermore, most animals in zoos are not endangered.Captive breeding(圈养繁殖)of endangered big

cats, Asian elephants, and other species has not resulted in their being sent back to the wild.Zoos talk a lot about their captive breeding programs because they do not want people to worry about a species dying out.In fact, baby animals also attract a lot of paying customers.Haven’t we seen enough competitions to name baby animals?

Actually, we will save endangered species only if we save their habitats and put an end to the reasons people kill them.Instead of supporting zoos, we should support groups that work to protect animals’ natu ral habitats.

46.How would the author describe the animals’ life in zoos?

A.Dangerous.B.Unhappy.C.Natural.D.Easy.

47.In the state of zoophobia, animals _________.

A.remain in cages B.behave strangely

C.attack other animals D.enjoy moving around

48.What does the author try to argue in the passage?

A.Zoos are not worth the public support.

B.Zoos fail in their attempt to save animals.

C.Zoos should treat animals as human beings.

D.Zoos use animals as a means of entertainment.

49.The author tries to persuade readers to accept his argument mainly by _____.

A.pointing out the faults in what zoos do

B.using evidence he has collected at zoos

C.questioning the way animals is protected

D.discussing the advantages of natural habitats

50.Although he argues against zoos, the author would still agree that _______.

A.zoos have to keep animals in small cages

B.most animals in zoos are endangered species

C.some endangered animals are reproduced in zoos

D.it’s acceptable to keep animals away from their habitats

C

Motherhood may make women smarter and may help prevent dementia(痴呆)in old age by bathing the brain in protective hormones(荷尔蒙), U.S.researchers reported on Thursday.Tests on rats show that those who raise two or more litters of pups do considerably better in tests of memory and skills than rats who have no babies, and their brains show changes that suggest they may be protected against diseases such as Alzheimer’s(早老痴呆症).University of Richmond psychology professor Craig Kinsley believes his findings will translate into humans.―Our research shows that the hormones of pregnancy(怀孕)are protecting the brain, including estrogen(雌激素), which we know has many neuroprotective (保护神经的)effects,‖ Kinsley said.

―It’s rat data but humans are mammals just like these animals are mammals,‖ he added in a telephone interview.―They go through pregnancy and hormonal changes.‖ Kinsley said he hoped public health officials and researchers will look to see if having had children protects a woman from Alzheimer’s and other forms of age-related brain decline.

―When people think about pregnancy, they think about what happens to babies and the mother from the

neck down,‖ said Kinsley, who presented his findings to the annual meeting of the Society of Neuroscience in Orlando, Florida.

―They do not realize that hormones are washing on the brain.If you look at female animals that have never gone through pregnancy, they act differently toward young.But if she goes through pregnancy, she will sacrifice her life for her infant—that is a great change in her behavior that showed in genetic alterations (改变)to the brain.‖

51.How do scientists know ―Motherhood may make women smarter‖?

A.Some researchers have told them.

B.Many women say so.

C.They know it by experimenting on rats.

D.They know it through their own experience.

52.What does the phrase ―litters of pups‖ mean in the second paragraph?

A.Baby rats.B.Animals.C.Old rats.D.Grown-up rats.53.What can protect the brain of a woman according to the passage?

A.Estrogen.B.The hormones of pregnancy.

C.More exercise.D.Taking care of children.

54.―It’s rat data but humans are mammals just like these animals are mammals.‖ What does the sentence suggest?

A.The experiments on the rats have nothing to do with humans.

B.The experiments on the rats are very important for animals.

C.The experiments on the rats are much the same on humans.

D.The experiments on the rats are much the same on other animals.

55.Which title is the best for this passage?

A.Do You Want to Be Smarter?

B.Motherhood Makes Women Smarter

C.Mysterious Hormones

D.An Important Study

D

Homestay provides English language students with the opportunity to speak English outside the classroom and the experience of being part of a British home.

What to Expect

The host will provide accommodation and meals.Rooms will be cleaned and bedcovers changed at least once a week.You will be given the house key and the host is there to offer help and advice as well as to take an interest in your physical and mental health.

Accommodation Zones

Homestays are located in London mainly in Zones 2, 3 and 4 of the transport system.Most hosts do not live in the town centre as much of central London is commercial and not residential(居住的).Zones 3 and 4 often offer larger accommodation in a less crowned area.It is very convenient to travel in London by underground.

Meal Plans Available

? Continental Breakfast

? Breakfast and Dinner

? Breakfast, Packed Lunch and Dinner

It’s important to note that few English families still provide a traditional cooked breakfast.Your accommodation includes Continental Breakfast which normally consists of fruit juice, cereal(谷物类食品),bread and tea or coffee.Cheese, fruit and cold meat are not normally part of a Continental Breakfast in England.Dinners usually consist of meat or fish with vegetables followed by desert, fruit and coffee.Friends

If you wish to invite a friend over to visit, you must first ask your host’s permission.You have no right to entertain friends in a family home as some families feel it is an invasion of their privacy.Self-Catering Accommodation in Private Homes

Accommodation on a room-only basis includes shared kitchen and bathroom facilities and often a main living room.This kind of accommodation offers an independent lifestyle and is more suitable for the long-stay student.However, it does not provide the same family atmosphere as an ordinary homestay and may not benefit those who need to practice English at home quite as much.

56.The passage is probably written for___________.

A.host willing to receive foreign students

B.foreigners hoping to build British culture

C.travelers planning to visit families in London

D.English learners applying to like in English homes

57.Which of the following will the host provide?

A.Room cleaning.B.Medical care.

C.Free transport.D.Physical training.

58.What can be inferred from Paragraph 3?

A.Zone 4 is more crowded than Zone 2.

B.The business centre of London is in Zone 1.

C.Hosts dislike travelling to the city centre.

D.Accommodation in the city centre is not provided.

59.According to the passage.What does continental Breakfast include?

A.Dessert and coffee B.Fruit and vegetables.

C.Bread and fruit juice D.Cereal and cold meat.60.Why do some people choose self-catering accommodation?

A.To experience a warmer family atmosphere.

B.To enrich their knowledge of English.

C.To entertain friends as they like.

D.To enjoy much more freedom.

二下面采访中有5处需要添加信息。请从以下选项中(A, B, C, D, E和F)中选出符合各段意思的选项。选项中有一项是多余的。

61 _________________________________

There were the older jazz musicians who hung around our house when I was young.I saw how much they practiced, how serious they were about their art.I knew then I had to work just as hard if I wanted to succeed.Of course, my father inspired me a lot, and many teachers took the time to nurture my talent and the talents of other students in our school.

62._____________________________

Yes.We’ve done such a poor job with music education because, as a society, we haven’t maintained the kind of education that a true artist and musician needs.Young people haven’t been able t o equate romance and talent with music.For instance, most of the people who make it in the music industry today have to look good.How they sound is secondary.Sarah Vaughan, Bessie Smith, Ella Fitzgerald — those big, romantic queens of jazz music wouldn’t make it in today’s music industry, and that’s a shame.We need to teach young people about the alternatives.

63.______________________________

Around the world people make music that, if you listen carefully to it, sounds a little like the cadence of their language.I’d call it folk music.When I’m away from home, I make a point of listening to regional folk music, not what’s on the radio.

64._______________________________

The same music is on the radio all over the world, and the American sound is overwhelming.Even the pop music that’s produced and created in foreign countries has that American beat, which underscore funk.As a musician, I’m not interested in hearing recycled versions of the same genre over and over.Any music that doesn’t have a development section just isn’t interesting to me.

65._________________________________

The music press has so much to introduce these days, and jazz is just a small fraction of it.Because some people are intimidated by jazz, they don’t cover it unless it’s a big name.New jazz musicians don’t get much of break.A lot of editors don’t say anything about jazz these days unless it’s Marsalis.That’s a shame.What VH1 is doing with their Save the Music campaign is phenomenal.They’re getting all these instruments out to needy kids.It’s the kind of thing all networks should be doing.

第二部分非选择题部分(满分40分)

请将非选择题部分的答案填涂在答题卡Ⅱ上。

第一节单词拼写(共10小题;每小题1分,满分10分)

根据下列句子及所给单词的中文,写出各单词的正确形式(每空限填一词)。

1.The newly-built cinema is convenient for the ________(伤残)to get in.

2.Doing morning exercises surely has some ________(有益的)effects on our health.

3.The book has been rewritten so that the students can easily understand it.In other words, it is ________

(改编)for the students.

4.He was filled with ________ (雄心)to become famous, rich and powerful.

5.I felt quite ________(尴尬)when I couldn’t answer the teacher’s question in front of so many classmates.

6.Usually people show great________(同情)for the children begging in the streets.

7.The company will have its ________(年度)celebration this Saturday.

8.Those who ________(遗弃)themselves to despair can not succeed.

9.The mountains are ________(映射)in the clear water, forming a pleasant picture.10.A baby is too young to be ________(意识)of the dangers around it..

第二节短文改错(每小题1分;共10分)

下面短文中有10处语言错误。请在有错误的地方增加、删除或修改某个单词。

增加:在缺词处加一个漏字符号(∧),并在其下面写上该加的词。

删除:把多余的词用斜线(\)划掉。

修改:在错的词下划一横线,并在该词下面写上修改后的词。

注意:1.每处错误及其修改均仅限一词;

2.只允许修改l0处,多者(从第ll处起)不计分。

Ask your friend that he can use a glass of water as a musical instrument.Of course, he can’t.Then you take a glass of water.You put your finger in water and then move it slow round the rim of the glass, as shown in the picture.Your finger must not be much wet, but it must not be dry.So you must try many time.At last you will hear clear music which comes from the glass.When your finger moves round the rim, it makes the glass to vibrate and the glass makes a musical voice.The same principle makes the violin or its strings give music.

The America scientist Benjamin Franklin made a musical instrument out of glass bowls.He used the different principle.

第三节书面表达(满分20分)

随着高考的临近,部分住校生要求搬出学生宿舍,在学校附近租房子住。请你根据下表提供的

注意:1.陈述所有要点,可适当发挥,不要简单翻译;

2.词数100-120;

3.开头已给出,但不计入总词数。

参考词汇:熄灯制度blackout rule

With the College Entrance Examinations approaching day by day,some senior three students are moving out from their dorms and living in rented apartments near their schools.

_______________________________________________________________________________

_______________________________________________________________________________

_______________________________________________________________________________

参考答案

第一部分选择题部分

1-5 C B D B C 6-10 A B A D A 11-15 B A C A A 16-20 A D D A C

21-25 B C D B A 26-30 C A B D C 31-35 C A B D A 36-40 C A B D A

41-45 B C B A D 46-50 B B A A C 51-55 C A B C B 56-60 D A B C D

61-65 B A C F E

第二部分非选择题部分

单词拼写:

1.disabled 2.beneficial 3.adapted 4.ambition 5.embarrassed 6.sympathy 7.annual 8.abandoned 9.reflected 10.aware

短文改错:

Ask your friend that he can use a glass of water as a musical instrument.Of course, he

if / whether

can’t.Then you take a glass of water.You put your finger in/\water and then move it slow round

the slowly

the rim of the glass, as shown in the picture.Your finger must not be much wet, but it must not

very / too

be dry.So you must try many time.At last you will hear clear music which comes from the

times

glass.When your finger moves round the rim, it makes the glass to vibrate and the glass makes a

musical voice.The same principle makes the violin or its strings give music.

sound and

The America scientist Benjamin Franklin made a musical instrument out of glass bowls.He

American

used the different principle.

same

书面表达

参考范文

With the College Entrance Examinations approaching day by day,some senior three students are moving out from their dorms and living in rented apartments near their schools.

Most students think although school dorms bring them fun and friendship,the blackout rule to guarantee students sleeping hours doesn’t leave them enough time to finish their homework.Worse still,the noise in the dorms not only influences their studies but also ruins their rest.To many parents, they’d like to provide a better environment for their children so that they can study more efficiently.Besides,they can take care of their children’s daily meals and laundry,so their children can eat better and have a comfortable life.

In my opinion,whether a student should rent a house outside his school depends on his need.I am in favor of renting a house for the sake of study.After all,time is pressing.But I strongly recommend that parents should care much about their children while they are outside school.

2009年全国高考英语试题及答案-全国2(1)

2009年普通高等学校招生全国统一考试考题卷 英语 第一卷(选择题) 第一部分英语知识运用(共三节,满分50分) 第一节语音知识(共5小题;每小题1分,满分5分) 从A、B、C、D四个选项中,找出其划线部分与所给单词的划线部分读音相同的选项,并在答题卡上将该项涂黑。 例:have A. gave B. save C. hat D. made 答案是C 1. July A. diary B. energy C. reply D. daily 2. medicine A. twice B. medical C. perfect D. clinic 3. seize A. neighbour B. weigh C. eight D. receive 4. determine A. remind B. minister C. smile D. tidy 5. exist A. experience B. examine C. excite D. explode 第二节语法和词汇知识(共15小题;每小题1分,满分15分) 从A、B、C、D四个选项中,选出可以入空白处的最佳选项,并在答题卡上将该项涂黑。 例:It is generally considered unwise to give a child he or she wants. A. however B. whatever C. whichever D. whenever 答案是B。 6. It is often that human beings are naturally equipped to speak. A. said B. to say C. saying D. being said 7. Charles was alone at home, with looking after him.

2017年浙江高考英语试题和答案解析

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氨基甲酸铵的分解反应平衡常数的测定 浙江大学

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2019年浙江省杭州市萧山中学中考数学二模试卷(含2019中考试题)

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A.2B.3C.4D.5 7.如图所示的是一个小正方体的展开图,把展开图折叠成小正方体,有“粤”字一面的相对面上的字是() A.澳B.大C.湾D.区 8.在Rt△ABC中,∠B=90°,AB=3,BC=4,则cos C的值为() A.B.C.D. 9.已知抛物线y=a(x﹣1)(x﹣3)﹣2(a≠0)与x轴交点的横坐标为m,n,且m<n,又点(x0,y0)是抛物线上一点,则下列结论正确的是() A.该抛物线可由抛物线y=ax2向右平移2个单位,向下平移2个单位得到 B.若1<m<n<3,则a>0 C.若1<x0<3,则y0<0 D.不论a取何值,m+n=4 10.如图所示,在矩形ABCD中,F是DC上一点,AE平分∠BAF交BC于点E,且DE⊥AF,垂 足为点M,BE=3,AE=2,则MF的长是()

2012年浙江高考英语真题 解析版

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原电池电动势的测定实验报告 浙江大学

实验报告 课程名称:大学化学实验p 实验类型:中级化学实验 实验项目名称:原电池电动势的测定 同组学生姓名:无指导老师厉刚 一、实验目的和要求(必填)二、实验内容和原理(必填) 三、实验材料与试剂(必填)四、实验器材与仪器(必填) 五、操作方法和实验步骤(必填)六、实验数据记录和处理 七、实验结果与分析(必填)八、讨论、心得 一、实验目的: 1、补偿法测定电池电动势的原理和方法。 2、掌握电位差计、检流计与标准电池的使用方法。 3、学会电极和盐桥的制备方法。 4、掌握通过测量原电池的电动势计算热力学函数变化值的原理、方法及其他应用。 二、实验原理: 补偿法测电源电动势的原理: 必须严格控制电流在接近于零的情况下来测定电池的电动势,因为有电流通过电极时,极化作用的存在将无法测得可逆电动势。 为此,可用一个方向相反但数值相同的电动势对抗待测电池的电动势,使电路中没有电流通过,这时测得的两级的电势差就等于该电池的电动势E。 如图所示,电位差计就是根据补偿法原理设计的,它由工作电流回路、标准回路和测量电极回路组成。 ①工作电流电路:首先调节可变电阻R P ,使均匀划线AB上有一定的电势降。 ②标准回路:将变换开关SW合向E s ,对工作电流进行标定。借助调节R p 使得I G =0来实现E s =U CA 。 ③测量回路:SW扳回E x ,调节电势测量旋钮,直到I G =0。读出E x 。 专业:理科1010 姓名:陈世杰 学号:3100102092 日期:2012.03.26 地点:化学实验中心307 装 订 线 A

UJ-25高电势直流电位差计: 1、转换开关旋钮:相当于上图中SW,指在N处,即SW接通E N ,指在X 1 ,即接通未知电池E X 。 2、电计按钮:原理图中的K。 3、工作电流调节旋钮:粗、中、细、微旋钮相当于原理图中的可变电阻R P 。 4、电势测量旋钮:中间6只旋钮,×10-1,×10-2,×10-3,×10-4,×10-5,×10-6,被测电动势由此 示出。 三、仪器与试剂: 仪器:电位差计一台,惠斯登标准电池一只,工作电源,饱和甘汞电池一支,银—氯化银电极一支,100mL容量瓶5个,50mL滴定管一支,恒温槽一套,饱和氯化钾盐桥。 试剂:0.200mol·L-1KCl溶液 四、实验步骤: 1、配制溶液。 将0.200 mol·L-1的KCl溶液分别稀释成0.0100 mol·L-1,0.0300 mol·L-1,0.0500 mol·L-1,0.0700 mol·L-1,0.0900 mol·L-1各100mL。 2、根据补偿法原理连接电路,恒温槽恒温至25℃。 3、将转换开关拨至N处,调节工作电流调节旋钮粗。中、细,依次按下电计旋钮粗、细,直至检流计 示数为零。 4、连好待测电池,Hg |Hg 2Cl 2 ,KCl(饱和)‖KCl(c)|AgCl|Ag 5、将转换开关拨至X 1 位置,从大到小旋转测量旋钮,按下电计按钮,直至检流计示数为零为止,6个小窗口的读数即为待测电极的电动势。 6、改变电极中c依次为0.0100 mol·L-1,0.0300 mol·L-1,0.0500 mol·L-1,0.0700 mol·L-1,0.0900 mol·L-1,测各不同浓度下的电极电势E x 。

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