重庆一中高2020级高三下学期期中考试英语试题(含标准答案)

重庆一中高2020级高三下学期期中考试英语试题(含标准答案)
重庆一中高2020级高三下学期期中考试英语试题(含标准答案)

秘密★启用前【考试时间:】

2020年重庆一中高2020级高三下期期中考试

英语试题卷(含标准答案)

英语试题卷共9 页。满分150分。考试时间120分钟。

注意事项:

1. 答题前,务必将自己的姓名、准考证号填写在答题卡规定的位置上。

2. 答选择题时,必须使用2B铅笔将答题卡上对应题目的答案标号涂黑,如需改动,用橡皮

擦擦干净后,再选涂其他答案标号。

3. 答非选择题时,必须使用0.5毫米黑色签字笔,将答案书写在答题卡规定的位置上。

4. 所有题目必须在答题卡上作答,在试题卷上答题无效。

第Ⅰ卷

Ⅰ.听力部分(共二节,每小题1分,满分20分)

第一节(共5小题;每小题1.5分,满分7.5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。

1. Where does this conversation take place?

A. In a taxi.

B. At a train station.

C. In a hotel

2. How much did the man pay for the car?

A. $540.

B. $590.

C. $600.

3. What will the man lend to the woman?

A. A ruler.

B. A pair of scissors.

C. A piece of string.

4. What is the man doing now?

A. Sending money to New York.

B. Borrowing money from the bank.

C. Checking the money from New York.

5. What are the speakers mainly talking about?

A. A postcard.

B. A conference

C. A city

第二节(共15小题;每小题1.5分,满分22.5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,并标在试卷的相应位置。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 does the boy decide to do after school?

A. Listen to some songs.

B. Attend a birthday party.

C. Come to the girl's house

7. What kind of DVD has the girl got this time?

A. A musical.

B. An adventure.

C. A comedy

听第7段材料,回答第8、9题。

8. Who would the man like to head the new project?

A. Adams.

B. Rick.

C. Jan

9. What does the man think of Jan?

A. She is aggressive enough.

B. She is difficult to get along with.

C. She has rich working experience.

听第8段材料,回答第10至12题。

10. What does the woman ask the man to do?

A. Hand her a hammer.

B. Pass her a tool box.

C. Hold a ladder.

11. What is Mr. King doing now?

A. Working at the project site.

B. Having a meeting.

C. Laying the bricks.

12. What does the woman suggest the man do now?

A. Mix the paint.

B. Paint the wall.

C. Have lunch.

听第9段材料,回答第13至16题。

13. What does the woman use to make the soup?

A. Fresh tomatoes.

B. Canned tomatoes.

C. Roast tomatoes.

14. Who taught the woman to make the soup?

A. Her aunt.

B. Her friend.

C. Her mother.

15. How does the woman make the soup thick?

A. She adds less water.

B. She adds more tomatoes.

C. She boils the soup longer.

16. What does the woman add to make the soup really good?

A. Milk.

B. Butter.

C. Cream.

听第10段材料,回答第17至20题。

17. What does the speaker say about the hotel?

A. It is in the center of the town.

B. It's included in the cost of the trip.

C. It offers private rooms for visitors.

18. What can people do on the second day?

A. See a famous monument.

B. Take a boat trip.

C. Do some shopping.

19. Which place should visitors pay extra money to visit?

A. The Eiffel Tower.

B. The Louvre Museum.

C. The Notre Dame.

20. On which day are the visitors free to do anything?

A. The first day.

B. The second day.

C. The third day.

第二部分:阅读理解(共两节,满分40分)

第一节(共15小题;每小题2分,满分30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,并在答题卡上将该项涂黑。

A

The Chaucer Heritage Trust was founded in 1992 and aims to further interest, understanding and appreciation of the works of Geoffrey Chaucer, his life and times and influence. This year the Trust is holding The Canterbury Tales Writing Competition around the country. Students are invited to submit pieces of original

writing inspired by Geoffrey Chaucer's most famous work: The Canterbury Tales.

Who Can Take Part?

The competition is open to all schools and college communities including pupils who are home educated and any other young people’s community organizations.

The three age groups are:

Junior-up to 1l years old

Intermediate-12-15 years old

Senior--16-19 years old

Competitors must include their date of birth on the entry form.

Competition Guidelines

Choose ONE of the following:

Write a poem about a journey.

Write a short story which explores an important issue through animal characters.

Write an entry for an imaginary pilgrim(朝圣), based upon a modern-day occupation. For example, “The Nurse”, “The Banker” or “The Politician”.

Word Count

The maximum word count is 500 words.

Deadlines

All entries must be submitted by 31 January 2019.

Other rules

All entries must be the original work of the student(however, rewritings of existing stories are acceptable if original in presentation and content).

The decision of the judges will be final.

How to Enter

You can submit your entry at www.chaucer:https://www.360docs.net/doc/2016539935.html,/submityourentry

Further Information

For further information please contact Dr Charles Farris at farris@chaucer https://www.360docs.net/doc/2016539935.html,

21. Why was the Trust founded?

A. To discover talented writers.

B. To seek excellent original works.

C. To hold a writing competition annually.

D. To help people learn more about Geoffrey Chaucer.

22. Which of the following could participate in the competition ?

A. A college teacher.

B. A professional writer.

C. A nine-year-old student.

D. A twenty-year-old college student.

23. What can be learned about this competition?

A. Competitors can hand in only one entry.

B. The characters in the entries must be animals.

C. The word count should be more than 500 words.

D. Competitors should email their entries to Dr.Charles Farris.

B

The news that all teachers were expected to attend camp with their students left me feeling unsettled. For the first time in more than 20 years, I would need to spend

three days in the early autumn bush with 120 14-year-olds.

I love spending time with teenagers. But I teach Grade 12 English and am 51 years old. There is a difference between a literary seminar on King Lear, no matter how lively it may be, and late-night party in a campground. Besides, my idea of “outdoors” is biking on the Ottawa bike paths or sitting in the backyard with a cup of tea and a good book.

Eventually, we turn down a long dirt track that dives deep into a forest. I read the schedule and note the impressive minute-by-minute detail for the next 72 hours. I’ve never faced such a structured(高度组织化的) time since, well, when I went to camp in Grade 9. I think of home.

The next morning, I arise early. It is 7 a.m. Time for the polar bear dip. Everyone asks if I am going to swim. I respond with lame excuses and then wander, like a Grade 8 boy at the edges of a middle-school dance. Kids charge in, great plumes(股流) of water rising up around them as they shout with joy. My colleagues link arms, count down and run into the water bravely. Toweling off, the swimmers discuss the water temperature. The regret that I knew I would feel starts to kill me. I will now forever be the guy who did not take part in the polar bear dip. I walk slowly up to the dining hall and decide that from that moment on I will commit fully to camp life. My unwillingness to do anything is replaced with a burning desire to do everything.

At 7 a.m. the next morning, I am the first person on the beach in my bathing suit.

I dive into the water. I scream about how good it feels. Toweling off afterward, I talk to anyone within earshot about the temperature of the water.

Later that day, the camp winds down. Something has happened in this camp. To the students, for sure, but also to me. When the last camper leaves, I give the camp director a big hug.

24. How did the author feel before the camp?

A. Angry.

B. Disappointed.

C. Anxious.

D. Excited.

25. Why does the author mention the literary seminar in Paragraph2?

A. To stress its liveliness.

B. To explain its topic.

C. To introduce his preference.

D. To show its similarity to camping.

26.Why does the author decide to devote himself to camping?

A. He is fed up with making excuses.

B. He hates to be regret-stricken.

C. He desires to show off his swimming skills.

D. He is encouraged to do so by his colleagues.

27. What happened to the author at the end of the camp?

A. He has used up his energy.

B. He misses home very much.

C. He turns into a camp director.

D. He has become a camp lover.

C

Genealogy, or researching your family tree, is a hobby that can rapidly develop into an obsession. Before you start looking for your own ancestors, read this advice from genealogist Maria McLeod.

The first question to ask yourself is why you want to research your family tree. Genealogy is not about discovering that you are the lost prince or princess of an unknown kingdom. It’s about finding more about yourself. For most people the important question is “Why am I like I am?” You might not look like other members of your immediate family and you want to know where your green eyes or curly hair come from. You may be curious about why you have such a quick temper. You may even be suffering from a medical condition and want to know if something in your genetic makeup has caused it.

Another common motivation for researching your family tree is that you plan to visit the place that your ancestors came from and you secretly hope that you will find some long lost cousins with whom you can share your memories. There can be few more exciting things than meeting a distant cousin who is living on the other side of the globe and finding that she looks just like your younger sister. But you should also bear in mind that they may not necessarily want to have anything to do with you. Sometimes there are skeletons in the cupboard that you and your branch of the family are unaware of, but which are still fresh in the minds of your more distant relatives.

Once you are clear about your motivations, you need to take a moment to think about just how many ancestors you might have and how far back you intend to go. You have, no doubt, thought about your parents’ parents and your parents’ parents’ parents. But go back ten generations and the picture becomes much more complicated. You can work it out for yourself. You may be descended(遗传) from no fewer than 1,024 people through ten generations. This can mean that you spend hours going through official records, either in person at the records office or on the Internet. Are you prepared for such a huge task?

28. What might be Maria Mcleod’s first piece of advice be?

A. Be prepared to accept your bad temper.

B. Don’t expect to find lovely relatives.

C. Be prepared to find out your hidden health problems.

D. Don’t expect to find out you are a member of a royal family.

29. Why are some relatives unwilling to meet you?

A. You may bring back bad memories.

B. They find it disturbing to entertain you.

C. They suspect you of having wrong motives.

D. You could remind them of their lost loved ones.

30. What does the underlined word “it” in the last paragraph refer to?

A. Who your great grandparents are.

B. When you can finish your huge task.

C. Why researching a family tree is complex.

D. How many people you are descended from.

31. What is the best title for the text?

A. Uncovering family secrets: do you dare?

B. The science of genealogy: new developments

C. Expert opinions on researching your family past

D. A step-by-step guide to researching your family tree

D

Now the reason cooking has become so popular, especially among men, is that the kitchen is the new workshop. Deprived(剥夺)of the requirement to practice his hands-on skills in wood or metal, the modern man turns to the chopping-board worktop instead — previously this was more likely to be the woman’s area. It involves tools, process and planning, and satisfies a natural desire to produce something.

I like fooling about in the kitchen, to be honest. Last night, tired of too many visits to over-priced restaurants, I tried to do something a bit clever with meats and vegetables. It was all right, I suppose. I mean, my guest and I both ate it, but in a slightly awkward sort of way. It was all a bit brown. More to the point, it took hours and hours that could have been spent on something more constructive, such as mending the cooker. There are also three dead motorcycles in the garage, and they’re not going to repair themselves. I therefore recommend the “Strength Through Simplicity” cooking style-the new stage of culinary(烹饪的) progress shall be the garage.

I’m hoping to introduce the idea of garage cooking in a new TV series and, as usual, would welcome any suggestions; anything suitable for consumption by a man who has one reasonably clean hand and one coated with machine oil he’d rather not put near his face. This is not, in fact, without precedent(先例) I’ve been in a factory in India where the workers baked breads on the tops of hot machines, and they somehow tasted better for being a by-product of industrial effort.

Tonight I’ve had an oil change with a side of chain adjustment accompanied by beans and sausages.

32.According to the author, why are men increasingly interested in cooking?

A. They find it more enjoyable than working in a workshop.

B. They now have fewer opportunities to create things.

C. It is now more socially acceptable for men to cook.

D. Women are generally spending less time cooking.

33.What does the author think of the meal he prepared last night?

A. He didn’t practice his cooking skill fully.

B. He should have used the restaurant recipe.

C. He could have used the cooking time better.

D. He didn’t receive any encouragement from his guest.

34. What does the author most probably do?

A. A media worker.

B. A restaurant critic.

C. A cook.

D. An engineer.

35. What does the author want to imply by using the example of India workers?

A. The wisdom of industrial workers has been overlooked.

B. Skills learnt in a factory can be applied in cooking a meal.

C. Food cooked in a garage tastes as delicious as that from a kitchen.

D. Meals have previously been prepared in unusual workplace settings.

第二节(共5小题;每小题2分,满分10分)

Though it’s somewhat mysterious, sleep talking is a common phenomenon. 36 (and less than 10% do it every day). And roughly 67% of adults talk in their sleep at least once every three months. It often runs in families and tends to be more common among men.

37 — ranging from mumbling(咕噜)to complete sentences. Sometimes it may seem as though the sleep-talker is giving a speech, while at other times it can sound as though the person is carrying on a conversation with someone else. The chatter can occur during any stage of sleep.

If a friend or family member has ever told you that you talk in your sleep, your first concern might be whether you said something offensive or let out a long-held secret. 38 , as far as your health is concerned.

Sleep talking is considered a sleep disorder. In terms of what causes it, inadequate sleep, alcohol or drug use, illness, stress, anxiety, and depression are common causes of such unconscious thinking. 39 . In rare situations, sleep talking is associated with a psychiatric disorder(精神障碍).

If you’re frequently waking up tired, or you feel overwhelmed or sad most of the time, it's worth talking to your doctor about sleep talking. 40 . If you talk in your sleep only occasionally and you are not experiencing symptoms of any other sleep disorders or health conditions, then it's probably nothing to worry about.

A. It can be annoying to be a sleep-talker

B. Sleep talking can vary considerably in its content

C. About half of kids talk in their sleep at least once a year

D. Just make sure that it isn’t a red flag or another health problem

E. Therefore, for most people it is a rare and short-lived occurrence

F. Your second thought might be whether sleep talking is something to worry about

G.Sometimes this nighttime chatter accompanies other sleep disorders such as sleepwalking

第三部分英语知识运用(共三节,满分70分)

第一节完形填空(共20小题;每小题1.5分,满分30分)

阅读下面短文,从短文后各题所给四个选项(A、B、C和D)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。

Rhemy Elsey, a fifth-grader, is deaf and mainly uses sign language to communicate, along with the 41 of an interpreter. Some of his fellow fifth-graders decided to 42 their break once a week to form an American Sign Language club in order to chat more 43 with Rhemy.

It’s been a few months since the club was 44 and his classmates’ participation has 45 Rhemy. “It’ s like they want to be like me” he said.

Though Rhemy signs to communicate with others. he has cochlear implants(耳蜗植入)that help him 46 . His interpreter, Tammy Arvin, 47 the club, which meets every Wednesday. So far, the club members have learned basic 48 in different topics including school, food and clothing.

Arvin who accompanies him during school said that 49 the club’s formation, not only was it difficult for students to communicate directly with Rhemy, his use of an interpreter also led to 50 challenges for him. “It can be really 51 for deaf kids from a social and emotional standpoint to have an interpreter

52 them around all day long,” Arvin said. So when the other students expressed interest in an ASL club, Arvin was 53 .

The club has already had an effect on the way the students 54 with Rhemy. The 55 can have more natural conversations which make Rhemy feel less isolated(孤立的). And the students are also 56 a very important culture.

“They don’t necessarily realize they’ are learning…about deaf culture by 57 this club,” Arvin said. “It 58 gives them a perspective on this other 59 that they previously weren’t aware of, so they’re 60 greatly just in terms of learning about diversity and having a broader perspective on the world around them.

41. A. role B. help C. idea D. need

42. A. give up B. put off C. prepare for D. talk about

43. A. openly B. casually C. modestly D. effectively

44. A. improved B. formed C. evaluated D. purchased

45. A. delighted B. worried C. calmed D. disappointed

46. A. touch B. learn C. speak D. hear

47. A. visits B. blames C. instructs D. discovers

48. A. rules B. goals C. signs D. games

49. A. since B. before C. through D. during

50. A. economic B. intellectual C. political D. social

51. A. hard B. lucky C. funny D. helpful

52. A. driving B. disturbing C. following D. protecting

53. A. moved B. embarrassed C. anxious D. concerned

54. A. agree B. fight C. compare D. communicate

55. A. kids B. teachers C. interpreters D. parents

56. A. discussing B. exploring C. saving D. controlling

57. A. breaking up B. approving of C. looking into D. participating in

58. A. frequently B. hardly C. really D. suddenly

59. A. task B. behavior C. culture D. opinion

60. A. fearing B. benefiting C. appreciating D. ignoring

第II卷

第二节语法填空(共10小题;每小题1.5分,满分15分)

阅读下面材料,在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

More than 1,000 elephants face61 (starve) in Thailand because of the coronavirus crisis.An almost total absence of visitors62 (mean) that many caretakers are struggling to afford food for Thailand's 4,000 captive elephants. The animals can eat up 63 200kg of food a day.

Lek Chailert, 64 (found) of the Save Elephant Foundation, told the BBC: "If there is no support 65 (keep) them safe, these elephants, some of whom are pregnant, will 66 starve to death or may be put on to the streets to beg." Some elephants may be sold to zoos or they may 67 (return) to the illegal logging

business, which 68 (official) banned the use of elephants in 1989.

"It's a very hopeless outlook69 some financial help is received immediately," Lek Chailert adds. It's a challenge to keep the animals fed and healthy at 70 best of times but now it's the dry season, which make the situation even worse.

第四部分

第一节短文改错(共10小题,每小题1分,满分10分)

假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的以下作文。作文中共有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:在缺词处加一个漏子符号(∧)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。

When I was in the four grade, everyone knew that I was a best speller in the class.

I was so confident in my spelling abilities that I decided not study for my next spelling test.

Everything in the test was OK until my English teacher says “Handkerchief”. I forgot the last three letter. It occurred to me that my deskmate knew the word. My eyes rolled to the right, and then went quickly back to her own paper. I remained nervously because I had cheated. At the end of the test, I erased that I had written earlier and replaced it for the wrong answer. Though I didn’t keep my perfect scores, but at least I kept my honesty.

第二节书面表达(满分25分)

假定你是某某中学校学生会主席李华,针对目前同学们逐渐返校,但是新型冠状病毒仍然没有得到完全的控制,于是你受学生会委托,面向全校学生写一封倡议信,号召同学们在学校一定要做好自我保护。

内容包括:

1.养成良好的个人卫生习惯;

2.避免同学之间的密切接触,遵守学校公共秩序。

注意:

1.字数100字左右;

2.可以适当增加细节,以使行文连贯。

参考词汇:新型冠状病毒novel coronavirus

出题人:蒋晓亮

审题人:祝晓英阳一骄

2020年重庆一中高2020级高三下期期中考试答案

听力:1-5 CAACA6-10 CBBCA11-15 BABCA16-20 ABCBC

阅读21-23 DCA 24-27 CCBD 28-31DADC 32-35BCAD

七选五CBFGD

完型填空41-45 BADBA 46-50DCCBD 51-55 ACADA 56-60 BDCCB

语法填空61 starvation 62 means 63 to 64 founder 65 to keep

66 either 67 be returned 68officially 69 unless 70 the

短文改错

71.four- fourth 72. a-the 73.not后加to

74.says-said 75.letter -letters 76.her-my 77.nervous- nervously

78.that- what 79. for- with 80. 去掉but或者though

作文(见ppt)

Dear students,

Welcome back to school! Over the past few months, the novel coronavirus has made its way around China. It has such a strong impact on our life and study. Although the virus has been under control temporarily, it is still necessary to call on everybody to do a good job in personal protection.

First of all, wash you hands frequently and drink more water. When talking to others, you ‘d better keep a safe distance and don’t take your face mask off, which is beneficial to yourself and others. What’s more, avoid going to crowded places. If you go to the dinning hall or the bathroom, it’s essential to obey the orders and line up. Last but not the least , don’t believe rumors, don’t panic.

As a famous saying goes, “winter is coming, can spring far behind?”As long as we work together to scientifically prevent and cut off the transmission channels, we will be perfectly healthy. Let’s join hands and prepare for a promising future.

重庆一中2019级高三年级下学期月考 英语

重庆一中2019级高三年级下学期月考 第Ⅰ卷 第一部分听力部分(共三节,满分30分) 第一节(共5小题;每小题1.5分,满分7.5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,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.Who is the man possibly talking to? A.Adoctor. B.A teacher. C.His mother. 2.What do we know about Sam? A.His sister will leave for NewYork. B.His sister will for Los Angeles. C.He will leave NewYork. 3.Whet is the woman going to do? A.Rewrite the paper because there are too many mistakes. B.Throw the paper away. C.Read the paper again. 4.Why does the woman thank the man? A.He lent her some money. B.He gave her a five—pound bill. C.He returned her money founD. 5.Where does this conversation probably take place? A.At an airport. B.At their home. C.At a department store. 第二节(共12小题厦每小题l. 5分,满分18分) 听下面4段对话,每段对话或独自后有几个小题,从题中所给的A、B、C三个选项选出最佳选项,井标在试卷的相应位置。听每段对话前,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,每段对话读两遍。 请听第6段材料,回答第6至8题。 6.What is the recent bobby of the woman’s brother? A.Hiking. B .First aiD.C.Bird watching. 7.Why does the woman want a book? A.To learn abort birds. B.As a gift. C .For a frienD.8.Which book was NOT in stock? A.The book on hiking gear. B.Tory’s plant book.Ⅱtbook C.Peterson’s bird guide 请听第7段材料,回答第9至1l题。 9.Where does the conversation probably take place?

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重庆一中初2017级16—17学年度上期期末考试(Word版)

重庆一中初2017级16—17学年度上期期末考试 数 学 试 题 (考生注意:本试题共26小题,满分150分,考试时间120分钟) 参考公式:抛物线)0(2≠++=a c bx ax y 的顶点坐标为??? ? ? ?--a b a c a b 44,22 ,对称轴为a b x 2-=. 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 、C 、D 的四个答案,其中只有一个是正确的,请将正确答案的代号在答题卡中对应的方框涂黑. 1.在 1 4,1-,0, 3.2-这四个数中,属于负分数的是( ▲ ). A .14 B .1- C .0 D . 3.2- 2.下列4个图形中,是中心对称图形但不是.. 轴对称的图形是( ▲ ). A . B . C . D . 3.下列计算正确的是( ▲ ). A .523m m -= B .236a a a ?= C .326()ab ab = D .322()2m n mn m ÷= 4.下列说法中,正确的是( ▲ ). A .不可能事件发生的概率是0 B .打开电视机正在播放动画片,是必然事件 C .随机事件发生的概率是 2 1 D .对“梦想的声音”节目收视率的调查,宜采用普查 5.如图,AB ∥CD ,CB 平分∠ABD ,若∠C=40°,则∠D 的度数为( ▲ ). A .90° B . 100° C . 110° D . 120° 6.不等式组2,251 x x >- -≤?? ?的解集在数轴上表示正确的是( ▲ ). A B D C

第8题图 7 .在函数y = 中,自变量x 的取值范围是( ▲ ). A .3x -≥且0x ≠ B .3x ≤且0x ≠ C .0x ≠ D .3x -≥ 8.如图,在□ABCD 中,E 为CD 上一点,连接AE 、BD ,且AE 、BD 交于点F ,25:4:=??ABF DEF S S ,则DE :EC =( ▲ ). A .2:5 B .2:3 C .3:5 D .3:2 9.如图,⊙O 的直径AB 垂直于弦CD ,垂足是 E ,22.5A ∠=?, 4OC =,CD 的长为( ▲ ). A .22 B .4 C .24 D .8 10.下图是用棋子摆成的“上”字.如果按照以下规律继续摆下去, 那么通过观察,可以发现:第20个“上”字需要( ▲ )个棋子. 第1个“上”字 第2个“上”字 第3个“上”字 A .82 B .84 C .86 D .88 11.近来爱好跑步的人越来越多,人们对跑步机的需求也越来越大.图①、②分别是某种型号跑步机的实物 图与示意图,已知踏板CD 长为1.6m ,CD 与地面DE 的夹角∠CDE 为12°,支架AC 长为0.8m ,∠ACD 为80°,则跑步机手柄的一端A 的高度h 四舍五入到0.1m 约为( ▲ ). (参考数据:sin 12°=cos 78°≈0.21,sin 68°=cos 22°≈0.93,tan 68°≈ A .0.9 B .1.0 C .1.1 D .1.2 12.如图,平面直角坐标系中,矩形OABC 的顶点B 在第一象限,点C 在x 轴上,点A 在y 轴上,D 、E 分别 是AB ,OA 中点.过点D 的双曲线(,)00k y x k x = >>与BC 交于点G .连接DC ,F 在DC 上,且DF :FC =3:1,连接DE ,EF .若△DEF 的面积为6,则k 的值为( ▲ ). A . 163 B .323 C .6 D .10 A B

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