《加30套高考模拟卷》安徽省合肥市第一中学2020-2021学年高三冲刺高考最后1卷英语试题含解析

《加30套高考模拟卷》安徽省合肥市第一中学2020-2021学年高三冲刺高考最后1卷英语试题含解析
《加30套高考模拟卷》安徽省合肥市第一中学2020-2021学年高三冲刺高考最后1卷英语试题含解析

安徽省合肥市第一中学2020-2021学年高三冲刺高考最后1卷英语试题注意事项:

1.答题前,考生先将自己的姓名、准考证号填写清楚,将条形码准确粘贴在考生信息条形码粘贴区。2.选择题必须使用2B铅笔填涂;非选择题必须使用0.5毫米黑色字迹的签字笔书写,字体工整、笔迹清楚。

3.请按照题号顺序在各题目的答题区域内作答,超出答题区域书写的答案无效;在草稿纸、试题卷上答题无效。

4.保持卡面清洁,不要折叠,不要弄破、弄皱,不准使用涂改液、修正带、刮纸刀。

第一部分(共20小题,每小题1.5分,满分30分)

1.James, I don’t mind lending you the money ____ you pay it back within a month.

A.although B.now that

C.unless D.as long as

2.There is no doubt that climate all over the world ______ greatly in recent years.

A.had changed B.is changing

C.changed D.has been changing

3.He was offered a position at the local church school, _____ he went to the Cambridge.

A.after when B.since which

C.after which D.since when

4.Lifting off at sunrise, the hot air balloon goes wherever the wind blow.

A.may B.must C.need D.should

5.Nowadays, more and more young ladies, figures most are fine enough, are going on a diet. A.who B.whose

C.of whose D.of whom

6.—Going to watch the Women’s Volleyball Match on Wednesday?

—________! Will you go with me?

A.Y ou bet B.You got me

C.Y ou there D.You know better

7.--- How about ______ plan to open a branch?

--- I should say it was ______ failure.

A.a; a B.a; / C.the; / D.the; a

8.— I want to learn tennis. Would you like to help me?

—. But learning tennis is no walk in the park.

A.No kidding B.No wonder C.No problem D.No way

9.As often happens after long sleeplessness, he was ________ by an unreasoning panic.

A.seized B.fascinated

C.impressed D.embarrassed

10.For the final ______ of our journey,we decided to take the coach.

A.leg B.round

C.distance D.path

11.I regret not having taken your advice. Otherwise I ________ this mistake at the moment.

A.didn’t make B.wouldn’t make

C.hadn’t make D.wouldn’t have made

12.It is a foolish act to________ notes during a test as you will be severely punished.

A.stick to B.refer to C.keep to D.point to

13.The English in this story has been simplified to make it easier _______.

A.to be understood B.understood C.understanding D.to understand

14.The police have anyone with information to come forward and talk to them.

A.appealed to B.attended to

C.responded to D.attached to

15.Don’t be so discouraged. If you ________such feelings, you will do better next time.

A.carry on B.get back C.break down D.put away

16.—I am putting on weight again! Maybe I should start doing yoga.

—You _______ that the whole morning!

A.are saying B.have said C.have been saying D.were saying

17.The police are offering ______ reward of $50,000 for information leading to the arrest of _____ murderer.

A.the; the B.a; a C.the; a D.a; the

18.My toothache me. I thought it was going away, but it is getting worse now.

A.kills B.is killing C.has killed D.killed

19.He ________ in a university for five years, but now he runs a company of his own.

A.has taught B.had taught

C.taught D.has been teaching

20.The same boiling water softens the potato and hardens the egg. It’s about ________you’re made of, not the circumstances.

A.that B.what

C.how D.who

第二部分阅读理解(满分40分)阅读下列短文,从每题所给的A、B、C、D四个选项中,选出最佳选项。

21.(6分)While smartphones stand accused of a variety of crimes, these pocket computers can certainly be a force for good. Y our phone is always with you, making it the perfect device to push you into a more beneficial way of living. Here are some of the best apps that can help.

Habitica

Habitica turns the goal of forming good habits into a game, with its own characters and scoring. It’s a lot of fun,and the app also lets you build habits with friends and family. In addition to regular repeating habits, you can add a more general to-do list, and the rewards you get can be customized too — you could

treat yourself to a meal out or an extra hour of games.

Smoke Free

If you’ve got a specific habit in mind,then you’ll usually find specific apps to help, like Smoke Free. If you’re determined to give up smoking, then this is one of the most comprehensive apps for giving you that extra push you need to make a permanent change. The app offers a host of useful features for people wanting to go smoke-free :The ability to see your progress over time,charts showing how your health is improving,day-by-day encouragement,and some advice on techniques for giving up smoking.

MyFitnessPal

You can find a ton of health and fitness apps for your phone, but MyFitnessPal stands out not just because it is easy to use, but because it makes practical suggestions for you. It can take in a host of data, from the calories (卡路里)you’re taking in to the number of swims you’re doing per week, a nd offer reports on calorie consumption and macronutrient (大量营养素)breakdown.

1、What can Habitica help you to do?

A.Win a tough game. B.Start a lasting friendship.

C.Find a fancy restaurant. D.Develop a pleasant habit.

2、Which of the following can Smoke Free provide?

A.The freedom to smoke. B.The ability to make progress.

C.Advice on how to quit smoking. D.Charts about your excellent health.

3、What can we learn about the three apps mentioned in the text?

A.They’re cheap.B.They’re practical.

C.They’re free.D.They’re interesting.

22.(8分)Oh my God, the robots are taking over! We’re doomed! Doomed! Now that I’ve gotten that out of my system, it’s become clear that while we may or may not be doomed, the robots are taking over. The latest example is the governmen t’s new guidelines for self-driving cars.

Tesla, Google and Uber are already testing driverless cars in cities across America. Uber chief executive Travis Kalanick is among those predicting that by 2021, self-driving cars will play a big part in urban settings.

Nearly 40,000 people died last year in this nation in automobile-related accidents, and we believes driverless cars can save tens of thousands of lives annually.

Makes sense. Robot drivers are less likely to get drunk, drive without a license, text while driving or feel agitated at the scene of a pileup. On the other hand, I wonder how these highly sensitive cars will react, with walkers constantly dashing into the street. Will they jam on the brakes every 10 seconds?

But there’s a bigger picture. Not only are robots replacing humans behind the wheel, but behind the

work desk, in warehouses, senior homes, you name it. Robots aren’t just taking over in the workplace.

The question is, where can’t a robot function better than a human? How about writing so ngs? A robot can go through every combination of notes in record time and come up with a pleasing melody. The lyrics might be a different story. Is a Grammy-winning song co-written by Hank Human and R-3071 in our future?

Finally, it’s only a matter of time until we have robot politicians and presidential candidates. Why not? They can be programmed to be experts in world and domestic affairs and come up with the best solutions without corruption and bad humors.

Actually, it’s too bad such technology isn’t av ailable in 2016. Pretty sure the robot would win in a landslide.

1、What does the underlined word “agitated” mean?

A.Tired B.Cautious

C.Careful D.Anxious

2、What doubt does the writer have about self-driving cars?

A.How passengers behave in it.

B.How robot drivers get the license

C.How they avoid crashing into other car

D.How they respond to walkers on a busy street

3、The last questions asked in the sixth paragraph reflects the writer’s .

A.confidence in robots, winning Grammy Awards

B.eagerness to listen to songs written by robots

C.doubt about robots’ ability to write songs

D.curiosity about the future Grammy songs

4、What might be the most suitable title for the text?

A.Robots will control the world in every field

B.Robots are coming but not soon enough

C.Robots are being used in our daily life

D.Robots can drive cars and write music

23.(8分)If you have ever found yourself looking for your keys, misplacing your cell phone or wanting to keep track of your bicycle or car, then the TrackR, a device (装置) that works with your smartphone created by a California-based company, is for you! At $29.95 each, not like the expensive GPS systems, or with TrackR Pack purchase deals, you can’t afford not to have one!

Install (安装) the free TrackR app on your smartphone.Connect the app to your device and then you are ready to go! Simply attach the TrackR to whatever you don’t want to lose.The entire process of setting it up only takes 5 minutes or less.

If you have the hard TrackR, you can just hide it under your car’s floor mat, in the trunk or somewhere it won’t be found if your car gets stolen.If you forget where you parked your car, take out your smartphone and open the TrackR app.Tap on the “lost item” icon on the screen and the app will tell you exactly where it is.

You can also attach it to your pet.Put it on their collar, and the problem of searching for them as they run off to nearby places will be over! Attach it to your keys and wallet, and never waste a minute searching the whole house for it.The affordable TrackR even comes with a double-sided adhesive (黏合剂) so you can stick it to your laptop or under your bike seat.Track down and punish the thieves who steal your expensive things!

The convenience and the ability to find actually any object means that the TrackR is one of the most useful articles that you’ll find for any price.However, the best thing it can give is peace of mind, and it doesn’t get any better than that.

1、What is Paragraph 2 mainly about?

A.How the TrackR works.

B.The features of the TrackR.

C.Why the TrackR is invented.

D.The advantages of the TrackR.

2、What can the TrackR help people do?

A.Walk their pets nearby.

B.Recognize the thieves.

C.Seek their misplaced car.

D.Find them a parking place.

3、What can we infer about the TrackR?

A.It’s far from affordable.

B.It’s on sale worldwide.

C.It can be easily folded.

D.It’s small in size.

4、What’s the best title for the text?

A.TrackR — no limits

B.TrackR — no worries

C.TrackR — your item protector

D.TrackR — your financial manager

24.(8分)Spring is coming, and it is time for those about to graduate to look for jobs. Competition is tough, so job seekers must carefully consider their personal choices. Whatever we are wearing, our family and friends may accept us, but the workplace may not.

A high school newspaper editor said it is unfair for companies to discourage visible tattoos (纹身), nose rings, or certain dress styles. It is true you can’t judge a book by its cover, yet people do “cover” themselves in order to convey certain messages. What we wear, including tattoos and nose rings, is an expression of who we are. Just as people convey messages about themselves with their appearances, so do companies. Dress standards exist in the business world for a number of reasons, but the main concern is often about what customers accept.

Others may say how to dress is a matter of personal freedom, but for businesses it is more about whether to make or lose money. Most employers do care about the personal appearances of their employees, because those people represent the companies to their customers.

As a hiring manager I am paid to choose the people who would make the best impression on our customers. There are plenty of well-qualified candidates, so it is not wrong to reject someone who might disappoint my customers. Even though I am open-minded, I c an’t expect all our customers are.

There is nobody to blame but yourself if your set of choices does not match that of your preferred employer. No company should have to change to satisfy a candidate simply because he or she is unwilling to respect its standards, as long as its standards are legal.

1、Which of the following is the newspaper editor’s opinion according to Paragraph 2?

A.People’s appearances carry message about themselves.

B.Customers’ choices influence dress standards in companies.

C.Candidates with tattoos or nose rings should be fairly-treated

D.Strange dress styles should not be encouraged in the workplace

2、What can be inferred from the text?

A.Candidates have to wear what companies prefer for an interview.

B.What to wear is not a matter of personal choice for companies

C.Companies sometimes have to change to respect their candidates.

D.Hiring managers make the best impression on their candidates.

3、Which of the following would be the best title for the text?

A.Employees Matter B.Personal Choices Matter

C.Appearances Matter D.Hiring Managers Matter

4、The author’s attitude towards strange dress styles in the workplace may best be described as . A.enthusiastic B.negative

C.positive D.sympathetic

25.(10分)Silence is unnatural to man.He begins life with a cry and ends it in stillness.In between he does all he can to make a noise in the world, and he fears silence more than anything else.Even his conversation is an attempt to prevent a fearful silence.If he is introduced to another person, and a number of pauses occur in the conversation, he regards himself as a failure, a worthless person, and is full of envy of the emptiest headed chatterbox (喋喋不休的人).He knows that ninety-nine percent of human conversation means no more than the buzzing of a fly, but he is anxious to join in the buzz and to prove that he is a man and not a waxwork figure (蜡塑人像).

The aim of conversation is not, for the most part, to communicate ideas; it is to keep up the buzzing sound.There are, it must be admitted, different qualities of buzz; there is even a buzz that is as annoying as the continuous noise made by a mosquito (蚊子).But at a dinner party one would rather be a mosquito than a quiet person.Most buzzing, fortunately, is pleasant to the ear, and some of it is pleasant even to the mind.He would be a foolish man if he waited until he had a wise thought to take part in the buzzing -with his neighbors.

Those who hate to pick up the weather as a conversational opening seem to me not to know the reason why human beings wish 1:0 talk.Very few human beings join in a conversation in the hope of learning anything new.Some of them are content .if they are merely allowed to go on making a noise into other people's ears, though they have nothing to tell them except that they have seen two or three new, plays or that they had food in a Swiss hotel.At the end of an evening during which they have said nothing meaningful for a long time, they just prove themselves to be successful conservationists.

1、According to the author, people make conversation to .

A.exchange ideas B.prove their value

C.achieve success m life D.overcome their fear of silence

2、By "the buzzing of a fly" (Para.1), the author means"_____".

A.the noise of an insect B.a low whispering sound

C.meaningless talks D.the voice of a chatterbox

3、According to the passage, people usually talk to their neighbors___ .

A.about whatever they have prepared

B.about whatever they want to

C.in the hope of learning something new

D.in the hope of getting on well

4、What is the author's purpose in writing the passage?

A.To discuss why people like talking about weather.

B.To encourage people to join in conversations.

C.To persuade people to stop making noises.

D.To explain why people keep talking.

第三部分语言知识运用(共两节)第一节(每小题1.5分,满分30分)阅读下面短文,从短文后各题所给的A、B、C和D四个选项中,选出可以填入空白处的最佳选项.

26.(30分)Experts say boredom is good for kids. It forces them to be creative, 1 their imaginations, and helps them discover new things. A(n) 2 in point is 13-year-old Luke Thrill from Dubuque, Iowa.

Luke was 3 of playing video games and riding his bike, so he decided to build a tiny house in his backyard instead. He made money from cutting lawns(草坪) and 4 exchanged some services, such as gaining the help of an electrical engineer 5 sweeping his garage. Luke also 6 spare materials from his grandmother’s house and other 7 materials from his neighbors for some of the windows and the door.

The 89-square-foot home cost $1, 500 to build and 8 18 months. Inside ther e’s a kitchenette, a back sitting room, a table and a mounted(镶嵌的) TV, and an upstairs bedroom can be easily 9 by stairway.

Although Luke did the 10 and learned how to do all the work, he had his father’s 11 throughout the project. Greg Thrill was very happy that his son learned to stay on 12 and deal with grown-ups. 13 , he had some simple rules when Luke 14 the house: “You 15 the money. You build it. And you own it.”

Luke is now in love with 16 . He has a YouTube channel and hopes to 17 other kids to start building. 18 , he wants to build a bigger tiny house to live in, but for now, he 19 in his new home a few nights a week, does homework there, and uses it to take a 20 from his twin brother.

1、A.changes B.ignores C.improves D.weakens

2、A.method B.explanation C.procedure D.case

3、A.tired B.fond C.confident D.guilty

4、A.thus B.even C.still D.anyhow

5、A.in exchange for B.in praise for C.in support of D.in place of

6、A.updated B.ordered C.removed D.used

7、A.recycled B.cheap C.new D.raw

8、A.spent B.took C.saved D.wasted

9、A.supported B.accessed C.held D.landed

10、A.research B.housework C.experiment D.discovery

11、A.permission B.help C.control D.order

12、A.credit B.business C.budget D.duty

13、A.Therefore B.Besides C.Rather D.However

14、A.finished B.decorated C.started D.painted

15、A.borrow B.donate C.raise D.distribute

16、A.books B.videos C.riding D.building

17、A.inspire B.press C.command D.warn

18、A.Luckily B.Eventually C.Frequently D.Strangely

19、A.brings out B.leaves out C.hangs out D.puts out

20、A.ride B.risk C.chance D.break

第二节(每小题1.5分,满分15分)阅读下面材料,在空白处填入1个适当的单词或括号内单词的正确形式。

27.(15分)In this region of Yunnan, the Naxi people make up the 1.(major) of the population. Many tourists visit the region these days, 2.(hear) of the fascinating culture of the Naxi, and other ethnic groups. It's impossible not to fall3.the city of Lijiang, with its beautiful snow-covered mountain peak, and4.(it) maze of cobbled streets. Some tourists have been lucky5.to be put up by friendly Naxi people, so if someone offers you6.(accommodate), think it over7.you book into a guesthouse. Being part of a family is a good approach to8.(learn) about another culture. Exploring the old city is 9.good experience. You may think you wi ll get lost in the tiny streets, but don’t let this stop you! Just go down them and it's likely that you will come across something wonderful,10.will be unforgettable.

第四部分写作(共两节)第一节短文改错(满分10分)

28.(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。文中共有10处错误,每句中最多有两处。错误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(∧),并在此符号下面写出该加的词。

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。

Today is my mum’s birthday、This afternoon, I went to the biggest shopping center downtown, and

buy a present for her、Then I took the subway home、Sitting on the train, I thought my mum would very happy when she saw the presents、At the next station, an old man, that carried two heavy bags, got on the train but stood in front of me、He looked tired、I hesitated for the moment, and then offered my seat to her、The old man thanked me a lot of and sat down、Seeing his smile,I felt happily、

From this experience, I will be ready to helping others in the future、

第二节书面表达(满分25分)

29.(25分)每个人都有失败的经历。请以此为主题写一篇100左右的文章。要求:

1.回忆自己的一次失败。

2.反思失败的教训。

注意:1.词数100左右;

2.可以适当增加细节,以使行文连贯;

___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ _________________________________________________________________________________

参考答案

第一部分(共20小题,每小题1.5分,满分30分)

1、D

2、D

3、C

4、A

5、C

6、A

7、D

8、C

9、A

10、A

11、B

12、B

13、D

14、A

15、D

16、C

17、D

18、B

19、C

安徽省合肥市合肥一中2020届高三英语最后一卷试题含解析

安徽省合肥市合肥一中2020届高三英语最后一卷试题(含解析) 注意事项: 1.本试卷由四个部分组成。其中第一、二部分和第三部分的第一节为选择题。第三部分的第二节和第四部分为非选择题。共150分,共12页。 2.全部答案在答题卡上相应区域内完成,在本试卷上作答无效。选择题请使用2B铅笔填涂,非选择题请使用0.5毫米黑色签字笔作答。要求字体工整、笔迹清晰。 3.请在答题卡规定的地方填写好个人信息,并认真核对答题卡上所粘贴的条形码是否与本人的信息一致。 4.考试结束后,将本试卷和答题卡一并交回。 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。 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—小题。每段对话仅读一遍。 1. What’s the weather like in the man’s hometown? A. It changes very quickly. B. It is very windy and cold. C. It is very hot. 2. What do we know about the man? A. He is a reporter. B. He is a fisherman. C. He is a sportsman. 3. How much will the man pay? A. $15. B. $28. C. $30. 4. Where does the man want to go? A. To a railway station. B. To a post office. C. To the seaside. 5. How did the woman probably feel in the morning? A. Dizzy. B. Tired. C. Well.

安徽省铜陵市第一中学2019-2020学年高一上学期期中考试——数学

2019-2020学年第一学期期中考试卷 高一数学 满分:150分考试时间:120分钟 注意事项: 1.答题前,考生先将自己的姓名、准考证号码填写清楚,将条形码准确粘贴在条形码区域内。 2.选择题必须使用2B 铅笔填涂;非选择题必须使用0.5毫米黑色字迹的签字笔书写,字体工整、笔迹清晰。 3.请按照题号顺序在各题目的答题区域内作答,超出答题区域书写的答案无效;在草稿纸、试题卷上的答题无效。 4作图可先使用铅笔画出,确定后必须使用黑色字迹的签字笔描黑。 5.保持答题卡卡面清洁,不要折叠、不要弄破、弄皱,不准使用涂改液、修正带、刮纸刀。 6.考试结束后,将本试卷和答题卡一并交回。 一、选择题(本题共12小题,每小题5分,满分60分。在每小题给出的四个选项中,只有一项是符合题目要求的。) 1.已知集合,则 2 {(,),},{(,)44}A x y y x x R B x y y x ==∈==-A B =I A.x =2,y =4 B.(2,4) C.{2,4} D.{(2,4)} 2.已知全集,集合,则 {10,}U x x x R =≤∈{33},{5}M a a N b b =-≤≤=≤-为 ()U M N U eA. B. {53310}x x x -<<-<<且{533}x x x -<<->或 C. D. {53310}x x x -<<-<≤或{53310}x x x -≤≤-<<且 3.已知,则的非空 *{21,5,},{}A y y x x x N B x y x R ==+<∈== ∈A B I 子集的个数为 A.8 B.7 C.6 D.无数个 4.下列关于x ,y 关系中为函数的是 A. B.x 2+y 2=1 y =

2018年安徽省合肥一中高考数学最后一卷(理科)

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合肥市第一中学位于安徽省合肥市,是安徽省重点中学、联合国教科文组织俱乐部成员、安徽省示范性普通高级中学。 二、合肥168中学 合肥一六八中学位于安徽省合肥市,是一所由合肥市教育局主管的公立全日制完全中学,安徽省示范普通高中。 三、六安第一中学 2020年高考成绩揭晓,经过全体毕业班师生的辛勤努力,六安一中高考取得优异成绩,具体情况如下:1467人报考,达一本线1289人;600分以上591人,全省名列前茅。 四、安徽师范大学附属中学 安徽师范大学附属中学是安徽省教育厅唯一直属省示范高中,原安徽省25所重点中学和6所安徽省理科实验班承办学校之一,是安徽省第一所“中国科协青少年科技创新项目实验学校”。 五、马鞍山第二中学 是全国文明单位、全国精神文明建设先进单位、全国中小学德育工作优秀案例单位、教育部全国百所重点联系学校之一、全国绿色学校、全国中小学现代教育技术实验学校、全国消防安全教育示范学校、安徽省重点中学、安徽省首所示范高中、北大“中学校长实名推荐制”推荐资质学校、清华大学“新百年领军计划”推荐资质学校、复旦大学“望道计划”推荐资质学校。 六、安庆第一中学 是联合国教科文组织俱乐部成员、安徽省首批重点中学、安徽省示范高中、安徽省高中理科实验班承办学校。

以全面科学的评价模式开展生涯规划教育和信息化教学手段来推动和保障课程的实施,以保证课程质量。让学校走上了特色化发展之路。 八、淮北第一中学 淮北一中是首批省重点中学,全国现代教育技术实验学校,省级示范高中,安徽省新课程实验样本校,教育部特色高中建设项目培育校。 九、芜湖第一中学 芜湖一中是安徽省老牌重点中学和省首批示范高中。具有悠久办学历史和光荣革命传统,先后被评为省和国家级体卫工作先进学校、省教育干训实践考察基地、省科普工作先进集体等。 十、铜陵第一中学 安徽省重点中学,安徽省示范高中,中科大基础教育理科实验基地。先后被评为全国体育卫生工作先进单位、全国现代教育技术实验学校、省第四、第五届文明单位、省爱国主义教育示范学校、省绿色学校。

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水平位移 21x x >,所以21v v >,BC 错误; D .落在P 点的时间与落在Q 点的时间之比是11 22 2t v t v =,D 正确。 故选D 。 2.甲、乙两船在静水中航行的速度分别为5m/s 和3m/s ,两船从同一渡口过河,已知甲船以最短时间过河,乙船以最短航程过河,结果两船抵达对岸的地点恰好相同。则水的流速为( ) A .3m/s B .3.75m/s C .4m/s D .4.75m/s 【答案】B 【解析】 【分析】 【详解】 由题意,甲船以最短时间过河,乙船以最短航程过河,结果两船抵达对岸的地点恰好相同,可知,甲乙实际速度方向一样,如图所示 可得 tan v v θ= 水甲 cos v v θ= 乙 水 两式相乘,得 3sin =5 v v θ= 乙甲 则3 tan =4 v v θ=水 甲,解得v 水=3.75m/s ,B 正确,ACD 错误。 故选B 。 3.物体A 做平抛运动,以抛出点O 为坐标原点,以初速度v 0的方向为x 轴的正方向、竖直向下的方向为y 轴的正方向,建立平面直角坐标系。如图所示,两束光分别沿着与坐标轴平行的方向照射物体A ,在坐标轴上留下两个“影子”,则两个“影子”的位移x 、y 和速度v x 、v y 描述了物体在x 、y 两个方向上的运动。若从物体自O 点抛出时开始计时,下列图像中正确的是( )

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