文档库 最新最全的文档下载
当前位置:文档库 › 重庆市铜梁县第一中学2018届高三上学期第一次月考英语试题Word版含答案

重庆市铜梁县第一中学2018届高三上学期第一次月考英语试题Word版含答案

重庆市铜梁县第一中学2018届高三上学期第一次月考英语试题Word版含答案
重庆市铜梁县第一中学2018届高三上学期第一次月考英语试题Word版含答案

铜梁一中高2018级高三九月月考英语试卷

出题人:蔡远德审题人:欧德兰

1.说明: 时间:120分钟;分值:150分;

2.本卷分Ⅰ、Ⅱ卷,请将第Ⅰ卷选择题答案填入机读答题卡

.....

第一部分:听力理解( 共两节,满分30分)

第一节(共5小题;每小题分,满分分)

听下面5段对话。每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项。听完每段对话后,你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。

例:How much is the shirt?

A. £.

B.£.

C. £.

答案是C。

1. What does the woman think of the movie?

A. It’s amusing.

B. It’s exciting.

C. It’s disappointing.

2. How will Susan spend most of her time in France?

A. Traveling around.

B. Studying at a school.

C. Looking after her aunt.

3. What are the speakers talking about?

A. Going out.

B. Ordering drinks.

C. Preparing for a party.

4. Where are the speakers?

A. In a classroom.

B. In a library.

C. In a bookstore.

5. What is the man going to do?

A. Go on the Internet.

B. Make a phone call.

C. Take a train trip. 第二节(共15小题,每小题分,满分分)

听下面5段对话或独白。每段对话或独白后有几个小题,从题中所给的A、B、C三个选项中选出最佳选项。听每段对话或独白前,你将有时间阅读各个小题,每小题5秒钟;听完后,各小题将给出5秒钟的作答时间。每段对话或独白读两遍。

听第6段材料,回答第6、7题。

6. What is the woman looking for?

A. An information office.

B. A police station.

C. A shoe repair shop.

7. What is the Town Guide according to the man?

A. A brochure.

B. A newspaper.

C. A map.

听第7段材料,回答第8、9题。

8. What does the man say about the restaurant?

A. It’s the biggest one around.

B. It offers many tasty dishes.

C. It’s famous for its seafood.

9. What will the woman probably order?

A. Fried fish.

B. Roast chicken.

C. Beef steak.

听第8段材料,回答第10至12题。

10. Where will Mr. White be at 11 o’clock?

A. At the office.

B. At the airport.

C. At the restaurant.

11. What will Mr. White probably do at one in the afternoon?

A. Receive a guest.

B. Have a meeting.

C. Read a report.

12. When will Miss Wilson see Mr. White?

A. At lunch time.

B. Late in the afternoon.

C. The next morning.

听第9段材料,回答第13至16题。

13. Why is Bill going to Germany?

A. To work on a project.

B. To study German.

C. To start a new company.

14. What did the woman dislike about Germany?

A. The weather.

B. The food.

C. The schools.

15. What does Bill hope to do about his family?

A. Bring them to Germany.

B. Leave them in England.

C. Visit them in a few months.

16. What is the probable relationship between the speakers?

A. Fellow-travelers.

B. Colleagues.

C. Classmates.

听第10段材料,回答第17至20题。

17. When did it rain last time in Juárez?

A. Three days ago.

B. A month ago.

C. A year ago.

18. What season is it now in Juárez?

A. Spring.

B. Summer.

C. Autumn.

19. What are the elderly advised to do?

A. Take a walk in the afternoon.

B. Keep their homes cool.

C. Drink plenty of water.

20. What is the speaker doing?

A. Hosting a radio program.

B. Conducting a seminar.

C. Forecasting the weather.

第二部分:阅读理解(共20小题;每小题2分,满分40分)

第一节:阅读下列短文,从每题的四个选项(A、B、C、D)中,选出最佳选项(共15小题,满分30分)

A

Here is a list of some of the best museums for children in America.

Please Touch Children’s Museum

This museum lies in Philadelphia. It offers Alice in Wonderland exhibits where young children can play with giant flowers and have tea parties. Kids can also play on musical instruments and babies can crawl on lily pads, which make musical sounds.

The Children’s Museum of Indianapolis

This museum lies in Indiana. It holds a fair share of dinosaur fossils (化石). There are many fossils like the T. Rex, Bucky and many others in an 8,000-square-foot area. Around 10,000 man-made objects, including a 55-ton steam engine and a 33-foot tall water clock, are there in the 365,000-square-foot area. It also offers activities like dinosaur building, camps and classes featuring space themes and other educational programs.

Boston Children’s Museum

This museum lies in Massachusetts. The exhibits here are of health, art, science, culture and environment. In this museum, children also learn about Japanese culture. Activities like Play Lab, New Balance Climb and The Recycle Shop bring out the creativity in children.

National Museum of Play

This museum, which lies in Rochester area of New York, has a wide collection of

dolls, games, toys and other home crafts dating back to the 19th century. Here, educational tours include stories of machines and other toys. Kids can walk in Sesame Street exhibit and cook food at play or TV studios.

Children’s Museum of Houston

This museum lies in Texas. Termed as the best playground for mind, this museum offers scores of activities for kids of every age. It even offers free family adventure events where families with their kids are encouraged to work on math activities and games. Children also learn about broadcasting activities and preserving ecosystems.

21. One who has interest in environmental protection can choose to visit .

A. National Museum of Play or Children’s Museum of Houston

B. Boston Children’s Museum or Children’s Museum of Houston

C. Please Touch Children’s Museum or Boston Children’s Museum

D. The Children’s Museum of Indianapolis or National Museum of Play

22. While visiting National Museum of Play, you can take part in .

A. dinosaur building

B. New Balance Climb

C. playing with giant flowers

D. cooking food at play or TV studios

23. Who might be most interested in this passage?

A. Parents.

B. Students.

C. Teachers.

D. Researchers.

B

After years of heated debate, gray wolves were reintroduced to Yellowstone National Park. Fourteen wolves were caught in Canada and transported to the park. By last year, the Yellowstone wolf population had grown to more than 170 wolves.

Gray wolves once were seen here and there in the Yellowstone area and much of the continental United States, but they were gradually displaced by human development. By the 1920s, wolves had practically disappeared from the Yellowstone area. They went farther north into the deep forests of Canada, where there were fewer humans around.

The disappearance of the wolves had many unexpected results. Deer and elk populations—major food sources (来源) for the wolf—grew rapidly. These animals consumed large amounts of vegetation (植被), which reduced plant diversity in the park. In the absence of wolves, coyote populations also grew quickly. The coyotes killed a large percentage of the park’s red foxes, and completely drove away the park’s beavers.

As early as 1966, biologists asked the government to consider reintroducing wolves to Yellowstone Park. They hoped that wolves would be able to control the elk and coyote problems. Many farmers opposed the plan because they feared that wolves would kill their farm animals or pets.

The government spent nearly 30 years coming up with a plan to reintroduce the wolves. The . Fish and Wildlife Service carefully monitors and manages the wolf packs in Yellowstone. Today, the debate continues over how well the gray wolf is fitting in at Yellowstone. Elk, deer, and coyote populations are down, while beavers and red foxes have made a comeback. The Yellowstone wolf project has been a valuable experiment to help biologists decide whether to reintroduce wolves to other parts of the country as well.

24. What is the text mainly about?

A. Wildlife research in the United States.

B. Plant diversity in the Yellowstone area.

C. The conflict between farmers and gray wolves.

D. The reintroduction of wolves to Yellowstone Park.

25. What does the underlined word “displaced”in paragraph 2 mean?

A. Tested.

B. Separated.

C. Forced out.

D. Tracked down.

26. What did the disappearance of gray wolves bring about?

A. Damage to local ecology.

B. A decline in the park’s income.

C. Preservation of vegetation.

D. An increase in the variety of animals.

27. What is the author’s attitude towards the Yellowstone wolf project?

A. Doubtful.

B. Positive.

C. Disapproving.

D. Uncaring.

C

In a shocking upset, 70-year-old Republican candidate Donald Trump rode a wave to victory as voters elected him the 45th President of the United States.

Actually, a lot of experts had predicted that Democratic candidate Hillary Clinton would come out on top. Throughout the campaign, one of Trump's main challenges

was to persuade voters that he has the attitude, knowledge and judgment to be president. In the end, he was able to attract more than enough voters to his side.

Hillary Clinton admitted the election to Trump in a phone call at around 2:30 am." Hillary has worked very long and very hard over a long period of time," Trump told his supporters during his victory speech. "We owe her a major debt of gratitude for her service to our country. "

Hillary Clinton delivered her speech later in the day. "We must accept this result and then look to the future," she told her disappointed supporters. "Donald Trump is going to be our president. We owe him an open mind and the chance to lead. "

Trump's rise to the presidency comes after a long career as a real-estate developer. He built skyscrapers, resorts and golf courses. He also risked other businesses, introducing Trump Steaks, Trump Natural Spring Water, and an airline called Trump Shuttle. In 2004, he became a TV star with the reality show The Apprentice.

Now Trump and his team will have to face many difficult things. They'll have to work to bring the country together after a divisive campaign that upset millions of Americans. Throughout the country, millions of Americans are out of work and struggling to make ends meet. The new president must also address international issues. They include the war on terrorism and the refugee crisis. Still, Trump says he sees a bright future ahead. "Every single American will have the opportunity to realize his or her fullest potential," he told his supporters.

28. What should many experts think of Trump's victory?

A. It is expected.

B. It is satisfying.

C. It is annoying.

D. It is surprising.

29. How old was Donald Trump when he became a TV star?

A. 50 years old.

B. 54 years old.

C. 58 years old.

D. 62 years old.

30. What can be learned about Donald Trump from the passage?

A. He is a successful businessman.

B. He has been serving in government.

C. He thought badly of Hillary Clinton.

D. He is worried about America.

31. What is the last paragraph mainly about?

A. The problems with America.

B. The challenges Trump will face.

C. Trump's ideas about his future work.

D. The decisions Trump will have to make.

D

I think it was October, 1982. A friend had business dealings in the city of Reno, Nevada, and I was asked to accompany her on an overnight trip. While she conducted her business, I was aimlessly wandering down Virginia Street,heading into a most gloriously beautiful sunset. I had an urge to speak to someone on the street to share that beauty, but I c ouldn’t make eye contact with anyone. Quickly I ducked into a department store and asked the lady behind the counter if she could come outside for just a minute. She 1ooked at me as though I were from some other planet and said, “Well…’’ Surprisingly, she followed me out.

When she got outside I said to her, “Just look at that sunset! Nobody out here was looking at it and I just had to share it with someone.”

For a few seconds we just 1ooked. Then I said, “God’s in his heaven and all’s right with the world.” I thanked her for coming out to see it and sharing the beauty.

Four years later my situation had changed considerably. I had come to the end of a twenty-year marriage. I was alone and on my own for the first time in my life. One day, while my clothes were going around, I picked up a Unity Magazine and read an article about a woman who had been in similar circumstances. She had come to the end of a marriage, moved to a strange community, and the only job she could find was one she disliked: cosmetic sales in a department store. We had a lot in common.

Then something happened to her that changed everything. She said a woman came into her department store and asked her to step outside to look at a sunset. The stranger had said, “God’s in his heaven and all’s right with the world.”, and she had realized the truth in that statement and that she simply had not been seeing it. From that moment on, she turned her life around.

32. Why did the writer duck into a department store?

A. She found it was boring with nobody talking to her.

B. She wanted to buy something for her friend.

C. She wanted to find somebody sharing the beautiful sunset.

D. She thought it was his responsibility to share the natural beauty with others.

33. What does the sentence “God’s in his heaven and all’s right with the world” mean?

A. We should be optimistic in the face of uncertainty.

B. We should believe in God who can help us when we are in trouble.

C. We should never hold the belief that God can change our life.

D. We should be independent and enjoy ourselves in spite of difficulties.

34. What do you think finally changed the writer’s attitude towards life?

A. The old magazine she came across.

B. The encouragement from the woman.

C. The sunset they enjoyed four years ago.

D. The woman’s story.

35. What may be the best title for the text?

A. Depending on yourself

B. Sharing beauty

C. Struggling every day

D. Never giving up halfway

第二节七选五(共5小题;每小题2分,满分10分)

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两处为多余选项。

Travelling with teens

Vacationing with teens can be unpleasant since they can be a little moody sometimes. But with some careful consideration and planning you can make your family vacation fantastic and memorable.

36 Teens have strong opinions. If they don’t get a vote on options ahead of time, they are likely to punish you with a bad attitude. If you respect kids’ ideas, they’ll feel more included and be more cooperative.

Handle “Can I bring…?” requests carefully. Taking another child on your family’s v acation is a huge responsibility. Only agree if you know that child well and approve of their relationship with your child. If you don’t want to bring the friend, be honest, stand firm, and don’t negotiate(谈判). 37

Grad their attention. 38 Boring. Telling them you are going to the place where Tom Hanks first investigated the murder in The Da Vinci Code? Interesting! The big surprise is that once they’re there, they’ll probably find more than a few things to amuse them.

Avoid too much time with digital products.Teens can be addicted to their digital connections. (So can adults.) Family vacations are opportunities for us to get to know and appreciate new places and each other! Discuss digital use before the trip.

Set realistic expectations for unplugged time. 39

Make good memories. Sharing digital photos is awesome but written family travel journal can record different kinds of impressions. 40 These conversations are extremely interesting because everyone’s views are unique. Write them down! Rereading sections of your travel journals will provide wonderful family memories over the years.

A. Let them help plan.

B. It is the destination and the journey

C. As a teen, I came to hate this form of travel.

D. But be sympathetic as your child deals with disappointment.

E. Telling them you’re going to the most famous museum in Paris?

F. At the end of every day, talk about what each of you finds memorable.

G. Hopefully, everyone will enjoy themselves so much they won’t think

about screen time.

第三部分:英语知识运用(共两节,满分45分)

第一节完形填空(共20小题;每小题分,满分30分)

阅读下面短文,从短文后各题所给的四个选项(A、B、C、D)中,选出可以填入空白处的最佳选项。

It is widely believed that inner beauty is the most impressive in the world.

On the outskirts of a town in England lies a nice cottage with a large garden where there lives an old and aged man. The old man is 41 pruning(修剪), watering or fertilizing his flowers all the time. The garden 42 bees and butterflies dance and colorful flowers blossom all year around is so well-tended(被照顾地好)that every passer-by cannot but stop for a 43 with admiration.

One day a young 44 went by the old man’s garden. He stopped and gazed at the splendid garden and the special cottage, totally 45 the admiration at the beauty of these sceneries, 46 how happy he could be 47 he lived in such a beautiful place. Then, all of a sudden he found the old gardener was 48 _.

Greatly shocked, the young painter 49 that old man, asking “why are you busy 50 these flowers every day which you can’t see?” The blind gardener

gave a wide smile, explaining “First, I was a gardener when I was young, and I 51 like this job. Second, while I can’t see these flowers I can 52 them. Third, I can smell the sweetness of them. 53 the last one, that’s you.”

“Me? But you don’t know me.” responded the young painter.

“Yeah. But I know flowers are angels which everyone knows and would never 54 . I know a great many people who show 55 for life would stop by and the beauty of my garden will get them into a good __56 . In the meantime, it also gives a 57 to me to have a word with you here and to enjoy the happiness these flowers have brought us.”

The old man can’t see the beauty he’s created. 58 , every flower has eyes 59 _ which they can see the beauty and kindness of the old man’s heart and the sweetness of his soul.

The blind man grows flowers in his heart. Failing the sight of the beauty of blossoming, he surely can 60 the voice of it, I suppose.

41. A. left B. kept C. seen D. made

42. A. where B. which C. that D. what

43. A. chat B. return C. discussion D. glance

44. A. painter B. neighbor C. photographer D. traveler

45. A. faced with B. lost in C. devoted to D. moved by

46. A. thinking B. wondering C. picturing D. believing

47. A. when B. if C. even if D. since

48. A. particular B. special C. blind D. energetic

. approached B. reached C. watched D. prevented

. planting B. watering C. fertilizing D. tending

51. A. easily B. really C. accidentally D. eventually

52. A. get rid of B. give a touch to C. come up with D. have fun with

. Without B. In spite of C. And for D. Even so

54. A. pick them up B. turn them down C. let them down D. give them up

55. A. enthusiasm B. calmness C. kindness D. caution

56. A. mood B. condition C. place D. life

57. A. way B. time C. chance D. hand

. Therefore B. Anyway C. However D. Besides

59. A. for B. in C. from D. with

60. A. change B. hear C. remind D. accept

第Ⅱ卷(非选择题,共50分)

将答案写在答题卡上,在本试卷上作答无效。

第三部分:英语知识运用(共两节)

第二节:语法填空(共10小题;每小题分,满分15分)

阅读下面材料,在空白处填入适当的内容(不多于3个单词)或括号内单词的正确形式。

For you, the “Clear and Bright” day that falls in every April might be no more than just another holiday — the fact that it comes with three days off school matters to most students 61 (much) than the fact that it is part of the 24 solar terms (二十四节气).

But this ancient system that Chinese people have used 62 (keep) track of the time of year was added to the UNESCO list of Intangible Cultural Heritage of Humanity(人类非物质文化遗产)on Nov. 30.

To be fair, the terms do sound old; they 63 (invent) thousands of years ago to offer weather information for agricultural 64 (activity). But the truth is 65 they still have an influence on our lives today, even if we don’t realize it most of the time. For example, people from 66 (north) China are in the habit of eating dumplings 67 the day of Winter Solstice (冬至). And on Start of Autumn, some treat 68 (they) to a big feast, especially of meat, something they call “putting on autumn weight”, or tieqiubiao.

According to Chinese writer and academic Yu Shicun, the system is a p h i l o s o p h y o f time, 69 applies to everything. And this means they are 70 (likely) to die out.

第四部分写作(共两节,满分35分)

第一节:短文改错(共10小题;每小题1分,满分10分)

文中共有10处语言错误,每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。

增加:在缺词处加一个漏字符号(∧),并在其下面写出该加的词。

删除:把多余的词用斜线(﹨)划掉。

修改:在错的词下划一横线,并在该词下面写出修改后的词。

注意:1.每处错误及其修改均仅限一词;

2.只允许修改10处,多者(从第11处起)不计分

My uncle is the owner of a restaurant close to that I live. Though not very big, but the restaurant is popular in our area. It is always crowded with customers at meal times. Some people even had to wait outside. My uncle tells me that the key to his success is honest. Every day he makes sure that fresh vegetables or high quality oil are using for cooking. My uncle says that he never dreams becoming rich in the short period of time. Instead, he hopes that our business will grow steady.

第二节书面表达(满分25分)

假定你是李华,你曾因父亲两次生病致使家里贫穷欠债而辍学,但在谢先生的帮助下,你又回到了学校继续学习,从而实现了你的人生梦想。请你给谢先生写封感谢信,内容包括:

1.表达感激之情;

2.感谢的原因;

3.你将传递这份爱。

注意: 1. 词数100左右;

2. 可适当增加细节,以行文连贯;

3. 开头结尾已给出。

参考词汇:欠债:in debt

Dear Mr. Xie,

________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________

Yours,

Li Hua

铜梁一中高2018级高三9月月考英语答案

听力: 1. C 2. A 3. C 4. B 5. A 6. C 7. A 8. B

10. B 11. B 12. C 13. A 14. B 15. A 16. B

17. C 18. A 19. C 20. A

阅读理解:21---23 BDA 24---27 DCAB

28---31DCAB 32---35 CADB

七选五:36-40 ADEGF

完型填空:41-45 CADAB 46-50 CBCAD

51-55 BBCBA 56-60 ACCDB

短文填空:61. more 62. to keep 63. were invented

64. activities 65. That 66. northern 67. on

68. themselves 69. which 70. unlikely

短文改错:

71. that →where 72. but去掉73. had →have 74. honest→ honesty 75. or→ and 76. using →used 77. becoming前加of 78. the →a 79. our→ his 80. stead y→steadily

作文范文:

Dear Mr. Xie,

I’m very excited to write to express my thanks to you.

I am Li Hua, one of the the poor children who were crying for knowledge, but our families couldn’t afford the school fees because my father was ill twice and my family was in deep debt. Thank you for giving me generous support so that I could have the chance to go back to school. If not, I wouldn’t have realized my dream. Your help made much difference to the life of my family. I am sure to spread the love to help the people in need.

In brief, my appreciation to you can never be expressed in words. Please accept

my sincere gratitude.

Yours,

Li Hua

重庆七所直属中学情况复习过程

重庆市7所市直属重点中学情况 【重庆一中】:重庆市沙坪坝区沙南街2号 1、重庆市渝北校区:渝北校区位于重庆渝北两路回兴,是重庆一中最大的初中部,教学成绩显著,中考体育平均分数48分以上 2、大学城校区:重庆市沙坪坝区虎溪镇大学城中路 3、皇冠校区:皇冠东和3号门附近。 4、国际实验分校(国际部):北部新区金渝大道湖霞街2号 【班级分布的主要情况】: 初中:本部、渝北校区(主体) 高中:本部(主体)、大学城校区、国际部 一、本部:中考时候根据成绩来录取,分数较高的孩子,有平行班和实验班之分。 二、大学城:1.高三时候全体学生在大学城校区,也就是说高一、二学生主要在本部就读。 2.大学城也称重庆一中的分部,中考录取的分数会比本部的稍低一些。 三、国际部:主要是根据中考成绩和孩子志愿来录取的,会对孩子的英语成绩作更高要求。 【重庆南开中学】沙坪坝区沙南街1号。 1、重庆南开融侨中学:南岸区铜元局融侨半岛风临路,高二回本部,初、高中。 南开本部有少量班级,初中主要教学任务由融侨校区承担。 1、重庆南开中学高中部一般带有3的为实验班(火箭班)火箭班实力强悍师资力量最强,每年北大清华人数占南开1/3以上,生源以南开初中部为主,少数外招生也可以靠实力靠关系进入。据悉,外校生进去重庆南开中学本部基本都是签合同的比较优秀的孩子,三班相比五班更难,哪怕你考了全重庆市100,如果你没签合同,其余的三班五班希望渺茫。 下面是一个案例:10级巴川中学有一个进了三班,他是巴川初中最强的,两个进了五班,一个是铜梁县状元。另一个也差不多全市前十。 2、重庆南开中学本部班级设置: 10、15、20、1班外加南开本部最后两个班(2011级为22,23班)为实验班生源好每年北大清华人数占南开1/3。其余班级为平行班其实力也不可小觑,09年高考状元出自平行班!总之,能进入南开中学求学,都是孩子们一个好的开端。

最新-重庆一中初2018级初一下期末考试英语试题 精品

重庆一中初2018级12—13学年度七年级下期期末考试 英语试卷 (考试时间:120分钟总分:150分) 第I卷(90分) II.单项选择。(每小题1分,共20分) 从A、B、C、D四个选项中选出可以填入空白处的最佳答案。 ( ) 21. Most of the students in that village go the bridge to go to school. A. to B. on C. over D. across ( ) 22. I’m so sorry. There is for you today. A. something exciting B. nothing bad C. anything fun D.something terrible ( )23. –Can you tell me to do after school? – You can go to the library. A. w here B. when C. w hat D. h ow ( )24.–Do you often hear the song “Yesterday once more”? – Yes, it beautiful. We all like it. A. sounds B. listens C. makes D. looks ( )25. Jane, like her other classmates, __________ the new movie“Tiny Times” on vacation. A. want to watch B. want watching C. wants to watch D. wants watching ( )26. – Would you like some beef? – __________ . I don’t like meat. A. Yes, I’d love to B. No, I wouldn’t C. Yes, please D. No, thanks ( )27. – Who washed those clothes just now? – Father , mom! A. washed B. does C. was D. did ( ) 28. My father likes writing stories and ________ them to other people. A. saying B. talking C. telling D. speaking ( ) 29.Please be quick. We have____________ time left. A. much B. a little C. many D. some ( ) 30.My mother is 38 years old short curly hair, and she of medium build. A. with; is B. has; is C. with; has D. is; has ( )31. – Is she tall or short? –, but s he can’t pick the apples. A. Yes, she is B. No, she isn’t C. She is short D. She is tall ( )32. Please look out of the window. You can find some apples on the tree. A. don’t B. you C. not D.\ ( )33. Look at the candles on the cake. Can you in one go? A. blow out them B. blow out it C. blow them out D. blow it out ( )34. Let me you English, please. A. help; learning B. help; to learn C. to help; to learn D. to help; learn ( )35. Our teacher is friendly that we all want to talk with her. A. very B. too C. so D. kind of ( )36. In the morning, I usually go to the near my house to have breakfast. The dumplings there are delicious. A. street B. bank C. hospital D. restaurant

完整word版,2018年北京高考英语试卷及答案

2018年普通高等学校招生全国统一考试 英语(北京卷) 第一部分:知识运用(共两节,45分) 第一节单项填空(共15小题;每小题1分,共15分) 从每题所给的A、B、C、D四个选中,选出可以填入空白处的最佳选项, 并在答题卡上:将该项涂黑。 例: it's so nice to hear from her again__,we last met more than thirty years ago. A. what's more B. That’s to say C. In other words D. Believe it or not 答案是D。 1.-Hi, I'm Peter. Are you new here? I haven't seen you around? -Hello, Peter. I'm Bob. I just__on Monday. A. start B. have started C. started D. had started 2. __we don't stop climate change, many animals and plants in the world will be gone. A. Although B. While C. If D. Until 3. __along the old Silk Road is an interesting and rewarding experience A. Travel

B. Traveling C. Having traveled D. Traveled 4. Susan had quit her well-paid job and __as a volunteer in the neighborhood. when I visited her last year A. is working B. was working C. has worked D. had worked 5. She and her family bicycle to work, helps them keep fit A. which B. who C.as D. that 6. During the Mid-Autumn Festival, family members often gather together__a meal, admire the moon and enjoy moon cakes. A. share B. to share C. having shared D. shared 7. China's high-speed railways from 9,000 to 25,000 kilometers in the pastfew years. A. are growing B. have grown C. will grow D. had grown 8. In any unsafe situation, simply__the button and a highly-trained agent will get you the help you need. A. press

重庆市铜梁县第一中学万有引力与宇宙章末练习卷(Word版 含解析)

一、第七章万有引力与宇宙航行易错题培优(难) 1.假设太阳系中天体的密度不变,天体直径和天体之间距离都缩小到原来的一半,地球绕太阳公转近似为匀速圆周运动,则下列物理量变化正确的是( ) A.地球的向心力变为缩小前的一半 B.地球的向心力变为缩小前的 C.地球绕太阳公转周期与缩小前的相同 D.地球绕太阳公转周期变为缩小前的一半 【答案】BC 【解析】 A、B、由于天体的密度不变而半径减半,导致天体的质量减小,所以有: 3 / 4 328 r M Mρπ?? == ? ?? 地球绕太阳做圆周运动由万有引力充当向心力.所以有: // 22 1 G 16 2 M M M M G R R = ?? ? ?? 日日 地地 , B 正确,A错误; C、D、由 //2 / 22 4 G 2 2 M M R M T R π?? = ? ?? ?? ? ?? 日地 地,整理得:23? 4 T r GM π =,与原来相同,C正确;D 错误; 故选BC. 2.如图所示,卫星在半径为1r的圆轨道上运行速度为1υ,当其运动经过A点时点火加速,使卫星进入椭圆轨道运行,椭圆轨道的远地点B与地心的距离为2r,卫星经过B点的速度为B υ,若规定无穷远处引力势能为0,则引力势能的表达式 p GMm E r =-,其中G 为引力常量,M为中心天体质量,m为卫星的质量,r为两者质心间距,若卫星运动过程中仅受万有引力作用,则下列说法正确的是

A .1b υυ< B .卫星在椭圆轨道上A 点的加速度小于B 点的加速度 C .卫星在A 点加速后的速度为A υ= D .卫星从A 点运动至B 点的最短时间为 t =【答案】AC 【解析】 【分析】 【详解】 假设卫星在半径为r 2的圆轨道上运行时速度为v 2.由卫星的速度公式v = 知,卫星在半径为r 2的圆轨道上运行时速度比卫星在半径为r 1的圆轨道上运行时速度小,即v 2,故B 错误;卫星加速后从A 运动到B 的过程,由机械能守恒定律得, 221211()()22A B GMm GMm mv mv r r +-=+- 得A v =C 正确;设卫星在半径为r 1的圆轨道上运行时周期为T 1,在椭圆轨道运行周期为T 2.根据开普勒第三 定律3 1231221 2 ( )2r r r T T += 又因为11 12r T v π= 卫星从A 点运动至B 点的最短时间为2 2T t =,联立 解得t = 故D 错误. 3.宇宙中有两颗孤立的中子星,它们在相互的万有引力作用下间距保持不变,并沿半径不同的同心圆轨道做匀速圆周运动.如果双星间距为L ,质量分别为1m 和2m ,引力常量为G ,则( ) A .双星中1m 的轨道半径2 112 m r L m m =+ B .双星的运行周期22L T π = C .1m 的线速度大小1v m =

重庆一中初2018级八下物理期末试卷

重庆一中初2018级16-17学年度下期期末考试 物理试卷 (全卷共四个大题,满分100分考试时间90分钟) 注意事项: 1.试题的答案书写在答题卡(卷)上,考试结束后由监考老师将答题卡(卷)收回 2.全卷g=10N/kg,ρ水=1×103kg/m3 一、选择题(每小题只有一个选项符合题意,每小题3分,共36分) 1、下列对常见物理量的估计正确的是() A.中学生的重力约为50N B.人的密度约为0.5×103kg/m3 C.现在考试室内的气压约为1x105pa D.将初二物理书从地面捡到桌子上所做的功约为300J 2、如图所示的实例中,属于增大压强的是() A.在铁轨下面铺枕木B.大型载重车装有很多车轮 C.书包背带做得较宽D.切熟鸡蛋的钢丝很细 3、下列与压强有关的说法中,正确的是() A.船闸利用了连通器的原理实现船只通航 B.学生用吸管吸“早餐奶”与大气压无关 C.托里拆利实验最先证明了大气压的存在 D.液体在流速大的地方压强大,在流速小的地方压强小 4、如图所示的简单机械中,使用时一定费力的是() A.镊子 B.起子 C.钳子 D.动滑轮

5、下关于功和较的说法正确的是() A.被拉开的弹弓具有弹性势能 B.人用力推车而车未动,因为用了力所以推力做了功 C.人用竖直向上的力提水桶沿水平方向运动,人对水桶的拉力做了功 D.具有能量的物体一定正在做功 6、关于功率、机械效率的说法正确的是() A.做功多的机器机械效率一定高 B.机械效率高的机器功率一定大 C.功率小的机器做功慢 D.功率大的机器做功时间一定短 7、如图所示,摩托车运动员从高处平台的末端水平飞出,落在水平地面上,若不计空气阻力,则运动员(包含摩托车)在下落过程中() A.重力势能转化为动能,机械能不变 B.重力势能转化为动能,机械能增大 C.动能转化为重力势能,机械能增大 D.动能转化为重力势能,机械能减小 8、用测力计沿水平方向两次拉着同一物体在同一水平面上运动,第1次和第2次运动的s-t 图像如图所示,其对应的测力计示数分别为F1和F2,拉力的功率分别为P1和P2,则他们的大小关系正确的是() A.F1>F2 P1 >P2 B.F1 =F2 P1 >P2 C.F1=F2 P1 <P2 D.F1 <F2 P1 <P2 9、如图所示,底端装有电子阀门的圆柱形容器放在水平桌面上,容器中装有适量的水,一木块漂浮在水面上,控制阀门使容器中相同时间内流出的水量相等。下列表示木块下表面处水的压强P1、容器对桌面的压强P2、木块的重力势能E p和木块所受的浮力大小F随时 间t变化的关系图象中,可能正确的是() A. B. C. D.

(完整word版)2018年英语三级考试试题及答案解析

2018成人学士学位英语考试试题 I. Reading comprehension Passage 1 Since its founding in 1948, McDonald's has grown from a family burger (汉堡包) stand to a global fast-food chain, with more than 30,000 locations in 118 countries. With 58 million daily customers worldwide, McDonald’s is now s o ubiquitous around the globe that The Economist publishes a global ranking of currencies' purchasing power based on the prices charged at the local McDonald’s, called the Big Mac Index (巨无霸指数).That’s not to say that every nation carries the same m enu i tems: choices vary widely depending on location. Some Asian locations serve fried shrimp in a Big Mac roll, while McDonald’s in India doesn’t serve beef at all, relying instead on burgers made from vegetables, rice and beans. Not everyone in the world has been happy to greet Ronald McDonald when he moves to town. Many s ee McDonald's as a symbol of American economic and cultural chauvinism (沙文主义), and European nations in particular have viewed American-style fast food as an insult to their national food. A French farmer, Jose Bove, became something of a national hero in 1999 after he and a group of people destroyed a McDonald's under construction to protest globalization and "bad food." The next year, a bomb e xploded in a French McDonald’s, killing a 27-year-old employee. (76) (76)No one claimed responsibility. But regardless of whether you like their food or their policies, McDonald’s is still widely seen as one of the true pioneers of peaceful globalization. 1. According to the passage, which of the following statements is NOT TRUE. A. McDonald's was founded in 1948. B. McDonald’s has opened its restaurants in every city of the world. C. McDonald’s has over 30,000 locations in the world now. D. McDonald’s was very small in scale in the beginning. 2. The word ubiquitous in Paragraph 2 is most likely to mean ____. A. very crowded B. very dean C. existing everywhere D. occurring frequently 3. From Paragraph 2, we can conclude that ____. A. McDonald’s designs its menu to suit the local people B. millions of young adults got their first job with McDonald’s C. the McDonald’s menu sticks to old-fashioned favorites such as the Big Mac D. the low prices McDonald’s bring tens of millions of people through its doors every day 4. What did Jose Bove and his people do in 1999 to protest against McDonald's? A. They organized a strike. B. They protested outside a McDonald’s. C. They refused to go to a newly-built McDonald’s. D. They destroyed a McDonald’s under construction. 5. In ____, an employee died in a fatal bomb attack on a McDonald’s restaurant in France.

2018-2019学年重庆市铜梁一中高一下学期期中考试地理试题(解析版)

2018-2019学年重庆市铜梁一中高一下学期期中考试 地理试题(解析版) 第Ⅰ卷 一、单项选择题:本大题共30小题,每小题2分,共60分。 近年来,春运期间民工从珠三角地区返回到中西部的“摩托大军”规模显著缩小,驾驶私家车返乡数量大 幅增加。完成下列各题。 1. 影响民工返乡交通方式变化 的主要因素是A. 收入水平 B. 舒适程度 C. 交通条件 D. 区域差距2. 春运期间,这种交通出行方式变化的主要影响是 A. 缓解珠三角地区城市空城化 B. 制约珠三角地区产业向外转移 C. 加快中西部农村劳动力流出 D. 增加中西部地区农村交通压力 【答案】1. A 2. D 【解析】 【1题详解】 由“摩托大军”转变为驾驶私家车返乡,说明家庭的收入提高,汽车的能力提高,故答案选A。 【2题详解】 春运期间,大量农民工驾驶小汽车返乡,会对中西部地区农村交通带来压力,D对。春节期间,农民工返 乡,加剧了珠三角地区城市空城化,A错误;珠三角的产业转移与生产成本相关,B错误;影响中西部农村 劳动力流出的原因主要是经济因素,与出行方式无关,C错误。故答案选D项。 白山市,位于吉林省长白山西侧。近年来,每年的6—9月,越来越多的人尤其是老年人到白山休闲度 假。 据此完成下列各题。 3. 白山市每年6—9月出现的人口流入高峰,其原因类似于() A. 三峡水电站建设移民 B. 10月份大量农民工去新疆采摘棉花 C. 我国每年的春节返乡潮 D. 美国北部五大湖区老人向南部墨西哥湾沿岸迁移 4. 针对近年来出现的人口流动新现象,白山市急需() A. 发展森林工业 B. 完善食宿、医疗服务 C. 整治水土流失 D. 加快高档别墅区开发

重庆一中初2018级初二下英语期末考试试卷包含答案

重庆一中初2018级16 -17学年度下期期末考试 英语试卷 (全卷共十一个大题满分:150分考试时间:120分钟) 温馨提示: 1. 全卷分为第Ⅰ卷和第Ⅱ卷,请把第Ⅰ卷的答案用2B铅笔涂在答题卡上,把第Ⅱ卷的答案用黑色或蓝色中性笔书写在答题卷上。 2. 考试结束,由监考人员将答题卡和答题卷一并收回。 第Ⅰ卷(共75分) I.听力测试。(共20分) 第一节(每小题1分,共6分) 听一遍。根据你所听到的句子,从A、B、C三个选项中选出最恰当的答语,并把答题卡上对应题目的答案标号涂黑。 ( ) 1. A. Yes, I am. B. Yes, I haven’t. C. Yes, I have. ( ) 2. A. No, it doesn’t. B. It’s kind of interesting. C. Yes, it is. ( ) 3. A. The Sahara. B. The Pacific. C. The Nile. ( ) 4. A. Never mind. B. You’re welcome. C. OK. ( ) 5. A. Hou Yi. B. The Monkey King. C. Yu Gong. ( ) 6. A. Good idea. B. The same to you. C. Not at all. 第二节(每小题1分,共6分) 听一遍。根据你所听到的对话和问题,从A、B、C三个选项中选出正确答案,并把答题卡上对应题目的答案标号涂黑。 ( ) 7. A. Before 9:00 pm. B. Before 10:00 pm. C. Before 11:00 pm. ( ) 8. A. 950 meters. B. 900 kilometers. C.850 meters. ( ) 9. A. This morning. B. Today. C. Yesterday. ( ) 10. A. For ten minutes. B. In ten minutes. C. In ten days. ( ) 11. A. Justin Bieber. B. The TF Boys. C. Taylor Swift. ( ) 12. A. In the park. B. In the library. C. At home. 第三节(每小题1分,共4分) 听两遍。根据你所听到的长对话,从A、B、C三个选项中选出正确答案,并把答题卡上对应题目的答案标号涂黑。 听下面一段材料,回答第13和14小题。 ( ) 13. What’s the weight of an elephant at birth? A. Around 100g. B. Around 100 kilos. C. About 200 kilos. ( ) 14. What color is an elephant? A. Brown. B. Grey. C. Brown, grey or red. 听下面一段材料,回答第15和16小题。 ( ) 15. Which book has Alex decided to write about for the English class? A. Little Women. B. Robinson Crusoe. C. Harry Potter. ( ) 16. What is J.K. Rowling’s childhood like? A. Unhappy. B. Soft. C. Common. 第四节(每小题1分,共4分) 听两遍。根据你所听到的短文内容,从A、B、C三个选项中选出正确答案,并把答题卡上对应题目的答案标号涂黑。 ( ) 17. Alice hasn’t returned home ________. A. for two years B. for two months C. for five years

完整word版2018年高考英语北京试题及答案

绝密★启用前 2018年普通高等学校招生全国统一考试 英语(北京卷) (考试时间:100分钟试卷满分:120分) 考生务必将答案答在答题卡上,在试卷上作答无效。 考试结束后,将本试卷和答题卡一并交回。 第一部分:知识运用(共两节,45分) 第一节单项填空(共15小题;每小题1分,共15分) 从每题所给的A、B、C、D四个选项中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。 例:It's so nice to hear from her again. _________, we last met more than thirty years ago. A. What's more B. That's to say D. Believe it or not C. In other words 答案是D。 1. —Hi, I'm Peter. Are you new here? I haven't seen you around? —Hello, Peter. I'm Bob. I just _________ on Monday. A. start B. have started C. started D. had started 2. _________ we don't stop climate change, many animals and plants in the world will be gone. A. Although B. While C. If D. Until 3. _________ along the old Silk Road is an interesting and rewarding experience A. Travel B. Traveling C. Having traveled D. Traveled 4. Susan had quit her well-paid job and _________ as a volunteer in the neighborhood when I visited her last year. A. is working B. was working C. has worked D. had worked 5. She and her family bicycle to work, _________ helps them keep fit. A. which B. who C.as D. that 6. During the Mid-Autumn Festival, family members often gather together _________ a meal, admire the moon

重庆市铜梁县第一中学高一(上)期末生物模拟试卷(答案带解析)

重庆市铜梁县第一中学高一(上)期末生物模拟试卷(答案带解析) 一、单选题 1.下列有关细胞生理功能及相关原理的叙述,正确的是() A.细胞凋亡遗传决定的程序性调控 B.细胞生长细胞核具有全能性 C.细胞分化基因突变并且逐渐积累 D.细胞衰老基因的选择性表达 2.下列实例中,能说明生命活动离不开细胞的是() ①流感患者打喷嚏时,会有大量流感病毒随飞沫散布于空气中 ②手触碰到盛有沸水的电水壶会迅速缩回 ③体操运动员完成单杠动作离不开肌肉细胞的收缩和舒张 ④人的胚胎发育过程中,细胞不断地进行分裂增殖 A.①②③B.②③④ C.①②④D.①②③④ 3.温室栽培可不受季节、地域限制,在封闭的温室内栽种农作物,以下哪种措施不能提高作物产量() A.增加室内CO2浓度B.夜间适当提高温度 C.增加光照强度D.延长光照时间 4.下列关于细胞膜的结构和功能的叙述中,错误 ..的是 A.多细胞生物细胞间的信息交流大多与细胞膜的结构和功能有关 B.多细胞生物的生存有赖于细胞膜的物质运输、能量转换和信息交流 C.生物膜系统中,只有细胞膜具有选择透过性 D.功能越复杂的细胞膜,蛋白质的种类和数量越多 5.下列有关染色质和染色体的叙述,错误的是 () A.染色质和染色体是同样的物质在不同时期的两种存在状态 B.染色质是核仁中或粗或细的长丝 C.细胞核所携带的遗传信息就在染色质中的DNA分子中 D.染色质中含有DNA、蛋白质和少量RNA 6.图表示物质进入细胞的不同方式,ATPase为ATP酶,在图示生理过程中还具有载体功能。下列有关叙述错误的是 A.ATP只影响方式③的运输速率B.吞噬细胞通过方式④吞噬病原体 C.低温会影响方式①~④的运输速率D.固醇类激素通过方式①进入靶细胞

(完整版)word版2018年全国高考2卷英语试题及答案(可编辑修改word版)

2018年全国普通高等学校统一考试 英语试题 (本试卷共12页。时间:120分钟总分:150分) 第一部分听力(共两节,满分30分) 做题时,先将答案标在试卷上。录音内容结束后,你将有两分钟的时间将试卷上的答案转涂到答题卡上。 例:How much is the shirt? A. £ 19. 15 B. £ 9. 18 C. £ 9. 15 答案是C。 第一节 听下面5段对话。每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。听完每段对话后,你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。 1. What does John find difficult in learning German? A. Pronunciation. B. Vocabulary. C. Grammar. 2. What is the probable relationship between the speakers? A. Colleagues. B. Brother and sister. C. Teacher and student. 3. Where does the conversation probably take place? A. In a bank. B. At a ticket office. C. On a train. 4. What are the speakers talking about? A. A restaurant. B. A street. C. A dish. 5. What does the woman think of her interview? A. It was tough. B. It was interesting. C. It was successful. 第二节 听下面5段对话或独白。每段对话或独白后有几个小题,从题中所给的A、B、C 三个选项中选出最佳选项,并标在试卷的相应位置。听每段对话或独白前,你将有

重庆市铜梁县第一中学初高中数学衔接教材试题:专题六二次函数的最值问题(附答案)

★ 专题六 二次函数的最值问题 【要点回顾】 1.二次函数2 (0)y ax bx c a =++≠的最值. 二次函数在自变量x 取任意实数时的最值情况(当0a >时,函数在2b x a =-处取得最小值244ac b a -,无最大值;当0a <时,函数在2b x a =-处取得最大值244ac b a -,无最小值. 2.二次函数最大值或最小值的求法. 第一步确定a 的符号,a >0有最小值,a <0有最大值; 第二步配方求顶点,顶点的纵坐标即为对应的最大值或最小值. 3.求二次函数在某一范围内的最值. 如:2y ax bx c =++在m x n ≤≤(其中m n <)的最值. 第一步:先通过配方,求出函数图象的对称轴:0x x =; 第二步:讨论: [1]若0a >时求最小值或0a <时求最大值,需分三种情况讨论: ①对称轴小于m 即0x m <,即对称轴在m x n ≤≤的左侧; ②对称轴0m x n ≤≤,即对称轴在m x n ≤≤的内部; ③对称轴大于n 即0x n >,即对称轴在m x n ≤≤的右侧。 [2] 若0a >时求最大值或0a <时求最小值,需分两种情况讨论: ①对称轴02 m n x +≤ ,即对称轴在m x n ≤≤的中点的左侧; ②对称轴02m n x +>,即对称轴在m x n ≤≤的中点的右侧; 说明:求二次函数在某一范围内的最值,要注意对称轴与自变量的取值范围相应位置,具体情况,参考例4。 【例题选讲】

例1求下列函数的最大值或最小值. (1)5322--=x x y ; (2)432+--=x x y . 答案:(1)4 7)2(531 例2当12x ≤≤时,求函数21y x x =--+的最大值和最小值. 答案:5;1min max -=-=y y 例3当0x ≥时,求函数(2)y x x =--的取值范围. 答案1-≥y 例4当1t x t ≤≤+时,求函数21522 y x x =--的最小值(其中t 为常数). 分析:由于x 所给的范围随着t 的变化而变化,所以需要比较对称轴与其范围的相对位置. 解:函数21522 y x x = --的对称轴为1x =.画出其草图. (1) 当对称轴在所给范围左侧.即1t >时:当x t =时,2min 1522y t t =--; (2) 当对称轴在所给范围之间.即1101t t t ≤≤+?≤≤时: 当1x =时,2m i n 1511322 y =?--=-; (3) 当对称轴在所给范围右侧.即110t t +

重庆一中初2018届16-17学年(上)半期试题——数学

重庆一中初2018级16—17学年度上期半期考试 数 学 试 题2016.12 (本试题共五个大题,26个小题,满分150分,时间120分钟) 一、选择题(本大题共12个小题,每小题4分,共48分)在每个小题的下面,都给出了代号为A 、B 、 1.A .1x y +≥ B .12x x - ≥ C .30x -> D .32 x x += 2.在平面直角坐标系中,点M (3,-2)在( ▲ ) A .第一象限 B .第二象限 C .第三象限 D .第四象限 3.x 的取值范围为( ▲ ) A .2x ≤ B .2x ≥ C .2x < D .2x > 4.北京时间2016年8月7日,在奥林匹克射击中心女子10米气手枪决赛展开争夺,中国选 手张梦雪最终以199.4 环夺冠,赢下了中国代表团在里约奥运会上的第一枚金牌.至此有越 来越多的爱好者投入到射击训练中,在一次10米气手枪的比赛中,甲、乙两名选手的平均 环数相等,方差分别为2=187.7S 甲 ,2=177.3S 乙,则成绩比较稳定的是( ▲ ) A .甲乙均可 B .甲 C .乙 D .无法确定 5.已知一次函数y kx b =+与y ax =的图象如图所示,则关于x 的不等式 ax kx b >+的解集为( ▲ ) A .1x < B .2x > C .1x >- D .1x > 6.关于x 、y 的方程组3x y m x my n -=??+=?的解是1 1x y =??=? ,则m n -的值是( ▲ A .1 B .2 C .3 D .5 7.一次函数2y x b =+的图象与坐标轴围成的三角形面积为1,则b 的值为( ▲ ) A .2 B .2-或12 C .1 2 D .2或2- 8.如图,在平面直角坐标系xOy 中,直线AB 交x 轴于点A 、交y 轴于点B ,且60BAO ∠=, 直线BC 垂直AB 于点B ,交x 轴于点C ,若()2,0A -,则点C 的 坐标为( ▲ )

重庆市铜梁县第一中学物理第十一章 电路及其应用精选测试卷

重庆市铜梁县第一中学物理第十一章 电路及其应用精选测试卷 一、第十一章 电路及其应用选择题易错题培优(难) 1.用两个相同的小量程电流表,分别改装成了两个量程不同的大量程电流表1A 、2A ,若把1A 、2A 分别采用并联或串联的方式接入电路,如图所示,则闭合电键后,下列有关电表的示数和电表指针偏转角度的说法正确的是 A .图甲中的1A 、2A 的示数相同 B .图甲中的1A 、2A 的指针偏角相同 C .图乙中的1A 、2A 的示数和偏角都不同 D .图乙中的1A 、2A 的指针偏角相同 【答案】B 【解析】 【详解】 AB.图甲中的A 1、A 2并联,表头的电压相等,电流相等,指针偏转的角度相同,量程不同的电流表读数不同,故A 错误,B 正确; CD.图乙中的A 1、A 2串联,A 1、A 2的示数相同,由于量程不同,内阻不同,电表两端的电压不同,流过表头的电流不同,指针偏转的角度不同,故CD 错误。 2.如图所示,三个定值电阻R 1、R 2、R 3的电阻值均不相等,在A 、B 之间接一个电源,在C 、D 之间接一个电流表,电流表的示数为I .现将电源、电流表的位置互调,则电流表的示数( ) A .可能增大 B .可能减小 C .一定不变 D .由于R 1、R 2、R 3大小关系不知,故无法判定 【答案】C 【解析】 两种情况下的电路连接如图所示:

设电源电压为U =6V ,R 1=3Ω,R 2=2Ω,R 3=6 Ω,在甲图中 23 23 = 1.5R R R R R ?=Ω+甲并, 112==1U R U R 甲并甲并,1=6V 2V 33 U U =?=甲并,电流表的示数为32V 1 =A 63U I R ==Ω甲并甲,在乙图中 12 12= 1.2R R R R R ?=Ω+乙并,335==1U R U R 乙并乙并,1=6V 1V 66 U U =?=乙并,电流表 的示数为11V 1 =A 33 U I R 乙并乙==Ω,故两次示数相同,则选C . 【点睛】在A 、B 之间接一个电源,假设A 端为正极,在C 、D 之间接一个电流表时,通过电流表的电流通路是:A----R 1----电流表----R 3----B 电路中的电阻是 R 1+R 3;将电源、电流表的地位互调,假设D 端为正极,通过电流表的电流通路是:D----R 1----电流表----R 3----C 电路中的电阻是R 1+R 3.电路的电源不变,电阻不变,故电流一定不变. 3.如图所示的部分电路中,已知I =3 A ,I 1=2 A ,R 1=10 Ω,R 2=5 Ω,R 3=30 Ω,则通过电流表的电流大小和方向是( ) A .0.5 A ,向右 B .0.5 A ,向左 C .1 A ,向右 D .1 A ,向左 【答案】A 【解析】 【详解】 对于稳恒电路中的某一节点,流入的电流总和一定等于流出的电流总和.对于节点c ,已知流入的电流I =3 A ,流出的电流I 1=2 A ,则还有1 A 的电流要流出节点c ,由此可知经过R 2的电流I 2=1 A 向右.根据欧姆定律, U 1=I 1R 1=20 V U 2=I 2R 2=5 V 电压等于电势之差 U 1=φc -φa U 2=φc -φb 两式相减可得 φb -φa =15 V 即b 点电势比a 点高15 V ,则通过R 3的电流 33 0.5A b a φφI R -= =

重庆一中初2018级17-18学年度下期半期考试数学试题及答案

重庆一中初2018级17-18学年度下期半期考试 数学试题 一.一、选择题(本大那共12个小题,每小题4分,共48分) 1.在实数-2、4、-l、0中,最小的数是() A. -2 B. 4 C. -1 D. 0 2.下列四个交通标志图中,是轴对称图形的是() A. B. C. D. 3 .估计2的值介于下列哪两个整数之间() A. 2和3 B. 3和4 C. 4和5 D5和6. 4.已知x-y=3,xy=l,则代数式3xy-5x+5y的值为() A. -12 B. -14 C. 12 D. 14 5.下列关于三角形的命题中,是假命题的是() A.三角形的三条角平分线相交于一点,并且这一点到三边距离相等 B.三角形的三条高线全在三角形的内部 C.面积相等的两个三角形不一定全等 D.一个三角形中至少有两个锐角 6 x的取值范国是() A. x>1 B. x≥1 C. x≥1且x≠2 D. x>1且x≠2 7.如图,在等边△ABC中,D、E、F分别是BC、AC、AB边上的点,其中DE⊥AC,EF⊥AB,FD⊥BC,则△ABC与△DEF的面积之比为() A.3:1 B. 3:2 C. D. 1 / 12

2 / 12 8.如图,Rt △ABC 的斜边AB =4,且AC =BC ,O 是AB 的中点,以O 为圆心的半圆分别与两直角边相切于点D 、E ,则图中阴影都分的面积是( ) A. 14 π- B. 22 π- C. 42 π- D. 4π- 9.下列图形都是由相同的小正方形按照一定规律摆放而成,其中第1个图共有3个小正方形,第2个图共有8个小正方形,第3个图共有15个小正方形,第4个图共有24个小正方形,…,照此规律排列下去,则第个8图中小正方形的个数是( ) A. 48 B. 63 C. 80 D. 99 10.小明利用所学数学知识测量某建筑物BC 的高度,采用了如下的方法:小明从与某建筑物底端B 在同一水平线上的A 点出发,先沿斜坡AD 行走260米至坡顶D 处,再从D 处沿水平方向继续前行若干米后至点E 处,在E 点测得该建筑物顶端C 的仰角为72°,建筑物底端B 的俯角为63°.其中点A 、B 、C 、D 、E 在同一平面内,斜坡AD 的坡度i =l :2.4,根据小明的测量数据,计算得出建筑物BC 的高度为( )米(计算结果精确到0.1米参考数据:sin720.95tan72 3.08sin630.89tan63 1.96?≈?≈?≈?≈,,,) A. 157.1 B. 157.4 C. 257.l D. 257.4 第7题图 第8题图 第9题图

相关文档
相关文档 最新文档