文档库 最新最全的文档下载
当前位置:文档库 › 浙江省金丽衢十二校2015届高三第一次联考英语试题含答案

浙江省金丽衢十二校2015届高三第一次联考英语试题含答案

浙江省金丽衢十二校2015届高三第一次联考英语试题含答案
浙江省金丽衢十二校2015届高三第一次联考英语试题含答案

保密★考试结束前

浙江省金丽衢十二校2015届高三第一次联考英语试题

注意:本试卷分为选择题和非选择题两部分。满分120,考试时间120分钟。

选择题部分(共80分)

第一部分:英语知识运用(共两节,满分30分)

第一节:单项填空(共20小题;每小题0.5分,满分10分)

从A、B、C和D四个选项中,选出可以填入句中空白处的最佳选项,并在答题纸上将该选项标号涂黑.

1. —Don’t hesitate to go to your teachers or parents for help if you feel too much pressure from study.

—_______ .

A. OK, I will

B. No, I won’t

C. Yes, of course

D. Sorry, I don’t

2. Li Na, ______ top Chinese tennis player who once ranked ______ second in the world, has announced to retire recently.

A. / , the

B. the, the

C. the, /

D. a, /

3. —How much homework did you do this weekend, Tom?

—I’m sorry to say, ______. I forgot it.

A. nothing

B. none

C. neither

D. not anything

4. How much ______ your new iPhone 6 looks with the new pack!

A. beautiful

B. beautifully

C. more beautiful

D. more beautifully

5. I, though good at English now, didn’t become interested in it until high school ______ I met my present teacher, Miss Li.

A. when

B. where

C. while

D. on which

6. It is recommended that we have an aim in study and life, or our ______ will be wasted.

A. strength

B. power

C. energy

D. force

7. Going off to college , especially a great one, ______ our mind and helps us prepare better for our future.

A. exchanges

B. expands

C. explores

D. exposes

8. The two presidents talked by telephone on Friday, but the details of ______ they said were not immediately available.

A. which

B. that

C. how

D. what

9. Believe it or not, the West Lake in Hangzhou was ______ by heavy smog on Oct. 17, 2014.

A. swallowed

B. covered

C. located

D. disappeared

10. Not excellent as I am now, I will fight for my future______ all the challenges.

A. instead of

B. because of

C. regardless of

D. on account of

11. Snowden’s documents showed that the US and the UK ______ on just everyone, including the world

leaders.

A. have been spying

B. would spy

C. are spying

D. had been spying

12. —Have you seen this latest American TV series?

—No. I’ve been occupied in my work. ______, it has got terrible reviews.

A. Instead

B. Therefore

C. Besides

D. Otherwise

13. —He is so kind a teacher!

—Yeah. But sometimes he ______ lose temper easily.

A. can

B. must

C. should

D. would

14. Do remember that there is always a chance of the weak ______ the strong.

A. beat

B. beating

C. to beat

D. beaten

15. True friends are those who are always there ______ you are rich or poor.

A. however

B. no matter

C. when

D. whether

16. Words fail me every time I try to express my gratitude to my parents. But for their care all these years, I

______ what I am today.

A. must not have been

B. would not be

C. will not have been

D. should not be

17. With her outstanding performance, Zhang Bichen ______ in the competition of the “V oice of China

2014”.

A. stood out

B. turned out

C. figured out

D. broke out

18. I have never seen such a person before in my mind. ______, that was a long time ago.

A. If so

B. If any

C. If ever

D. If have

19. You can’t imagine what difficulty doctors and medical workers had ______ the spread of Ebola virus.

A. controlled

B. to control

C. control

D. controlling

20. —Jim told me it would be easy for him to pass the driving test.

—Oh, _______ ! You know that’s a big talk.

A. come on

B. no way

C. it depends

D. forget it

第二节完形填空(共20小题;每小题1分,满分20分)

阅读下面短文,掌握其大意,然从21~40各题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该选项标号涂黑。

More often than not, life has its own way of tapping us on the shoulder, whispering “Pay attention to this”, which happens when we 21 expect it.

In the 1950s, I spent my days as a sixth grader in my school. One day, as I remembered, classes

22 with the usual noise made by voices and feet 23 students moved down the hall, up or down staircases. I was walking through the hallway at a rapid pace toward a large double stairway, which 24 the second and third floor of our building. Suddenly I noticed a new sound added to those already 25 me.

As I 26 the bottom of the stairway, I found Rochelle, a girl, who wore full leg braces(支架) and heavy orthopedic(矫形) shoes, made her way across a wooden-floored room. 27 she went, Rochelle 28 us of her serious polio(小儿麻痹症) a few years earlier.

Rochelle’s eyes were such deep 29 ones. She had a small, upturned nose and a wide mouth that smiled more often than not.

As Rochelle moved faster and faster, she lost balance, and 30 face down at the top of the stairway. 31 stretched to help her, but one word from Rochelle 32 them. “No!”she said. I watched her, 33 . Rochelle lifted her head, her eyes with unshed tears.

She amazingly pushed herself up to a kneeling position, and with a great effort, 34 to her feet. This was not her first time her legs had failed to support her. She held her head 35 , and accepted her book that a boy picked up and 36 held out to her, making her way up the stairway to the second floor,

pride in her blue eyes.

The whole incident 37 no more than a couple of minutes, but that day I learned a lot about dignity and strength of character. I found out the meaning of 38 . If Rochelle were alive today, she would probably still wear her braces or may 39 spend her days in a wheelchair, but I feel certain that her spirit is unchanged. She would be 40 likely to continue to teach life’s little lesson to a great many others, in her own quiet way.

21. A. most B. least C. much D. few

22. A. began B. ended C. changed D. started

23. A. as B. because C. now that D. unless

24. A. contributed to B. turned to C. came to D. led to

25. A. surrounding B. surrounded C. surround D. to surround

26. A. neared to B. closed to C. closed D. neared

27 A. whenever B. however C. wherever D. however much

28. A. regarded B. remembered C. recommended D. reminded

29. A. sad B. blue C. grey D. pale

30. A. ran B. landed C. lost D. jumped

31. A. Students B. Shoulders C. Hands D. Teens

32. A. stopped B. encouraged C. persuaded D. urged

33. A. out of breath B. taking a breath C. holding my breath D. catching my breath

34. A. put it B. made it C. took it D. got it

35 A. high B. highly C. low D. lowly

36 A. friendly B. kindly C. honestly D. cautiously

37 A. took B. spent C. cost D. paid

38 A. love B. appreciation C. independence D. kindness

39 A. still B. even C. yet D. ever

40 A. less than B. other than C. rather than D. more than

第二部分阅读理解(第一节20小题,第二节5小题;每小题2分,满分50分)第一节:阅读下列材料,从每题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该选项标号涂黑。

A

Whether you like it or not, I consider myself an honored member of East Asian society.

For the past 2 years, I’ve had the privilege of travelling to various countries in Asia, specifically Indonesia and China. These trips weren’t the typical va cations that last for roughly two weeks and consist of hurrying from one destination to the next. Rather, I completely buried myself in the culture, staying in both Indonesia and China for approximately 6 weeks. I befriended the man who made my breakfast every day in Beijing.

After two continuous years of escaping to the Eastern Hemisphere, however, I’m staying at home.

Every day, I long for the thrill of travelling, the thrill of trying a new Asian dish, the thrill of bargaining with a vendor(小商贩) on the street for what caught my eye. I catch myself watching hours Bizarre Foods with Andrew Zimmern, and replaying the parts where he visits a small town in China or a quiet village deep in Vietnam. Occasionally, I go through the pictures from my travels, thinking of the ones where my

memories origin from.

My desire to travel, in fact, makes me incredibly impulsive. One day, I was watching my old friend Andrew Zimmern travel to Cambodia. I watched him taste the special foods and float down a large man-made lake, staying with locals trying to find dinner. The second the show ended, I ran upstairs to my computer and looked up plane tickets to Phnom Penh. It’s pitiful, I know.

I apologize for this unhappy story that’s been a good portion of my article. Let me try to turn things around.

Though I’m upset about not being able to travel for the summer, staying in place does have its ups. I graduated from high school just recently. As I walked across the stage, reaching out for my high school principal’s hand with my right and taking my diploma with my left, I graduated. As I walked across the stage, suddenly, I realized I had just wrapped up one of the most important stages in my life. I was soon entering the real world, but I had one last summer that see-sawed in between the real world and the world my peers and I had just left. I had one last summer to make memories with high school friends that I would recall during old age.

Additionally, I am pleased to say I have found a job this summer. I work at the Seneca Hill Animal Hospital and Resort where I look after dogs whose owners have left for summer vacation. The work may be hard, but at least it paid off.

All in all, life at home so far has not been all that difficult. I’m spending time with old friends, and earning for myself, two things that could not be done outside the US. Although I would have wanted to spend the summer in a magical land with foreign foods, languages, and people, I have to realize that life is what you make of it. That’s why I’m going to make my time at home the best vacation I’ve ever had.

41. According to the writer, a typical vacation is one ________.

A. that lasts about a fortnight during which you hurry between destinations

B. where you stay in some place for seven weeks

C. where you can stay in East Asia

D. where you needn’t hurry between destinations

42. The writer gives the example of Andrew Zimmern in Paragraph 4 to ________.

A. explain his tiredness of trips to foreign countries

B. express his disappointment with his friends’ holiday

C. share with us his eagerness for trips

D. display his skills of taking photos

43. The underlined phrase “wrapped up” in paragraph 7 has a similar meaning to that in _______.

A. He received his Christmas gift wrapped up in a box

B. The meeting wrapped up and we soon left the lecture hall

C. She told the children to wrap up warm since it was so cold

D. The manager is wrapped up in his business, so just wait patiently

44. We can infer from the passage that _______.

A. in writer’s view, the two years in East Asian was another way of vacation

B. during his stay at home, the writer never thought about his travelling

C. without much travelling, life has been difficult for the writer

D. freed from trips, the writer actually gained much more than merely travelling

45. The best title of the passage can be _______.

A. An honored member of East Asian society

B. The privilege of travelling to various countries

C. Life without travelling is not all that difficult

D. Memories to be called up during old age

B

Once again this year, like last, I have the honor of recommending a selection of books for the TED Bookstore. Below are this year’s picks, along with the original text that appears on the bookstore cards and the introduction.

1. TINY BEAUTIFUL THINGS

When a journalist by the name of “Dear Sugar” introduced herself on The Rumpus on March 11, 2010, she made her suggestions clear a “by-the-book common sense of

Dear Abby and the low quality of Cary Tennis and the rudeness of Dan Savage and…”

But in the two-some years that followed, she went on to deliver something brief, more

honest, more profound(深刻的). Collected in Tiny Beautiful Things Advice on Love and Life from Dear Sugar, one of the best psychology and philosophy books of 2012, is her wholehearted wisdom on life’s trickiest contexts —sometimes the simplest, sometimes the most complex, always the most deeply human.

2. BIG QUESTIONS FROM LITTLE PEOPLE

The questions children ask are often so simple, so basic, that they turn unclear yet profound philosophy into requiring apple-pie-from-scratch type of answers. To explore

this simplicity and expansiveness, Elwin Harris asked thousands of primary school

children between the ages of four and twelve to send in their most restless questions, then

invited some of today’s most well-known scientists, philosophers, and writers —including TEDsters like Alain de Botton, Mary Roach, and Richard Dawkins — to answer them. The result is Big Questions from Little People & Simple Answers fr om Great Minds, among both the best children’s books of 2012 and the year’s overall reader favorites. Part of the money from the book benefits Save the Children.

3. WHERE THE HEART BEATS

In Where the Heart Beats, which was also one of the best philosophy books of 2012, longtime art critic and practicing Buddhist Kay Larson constructs an intellectual,

creative, and spiritual biography of John Cage —one of the most influential

composers in modern history, yet also one of history’s most misunderstood artists,

whose impact reaches beyond the field of music and into art, literature, cinema. Fifteen years in the making, this superbly researched, beautifully written masterpiece weaves together a great many threads of cultural history into a whole understanding of both Cage as an artist and Zen as a lens on existence.

4. ADVICE TO LITTLE GIRLS

In 1865, Mark Twain did something unexpected —he penned a children’s story, in which he challenged kids to digest the intelligent humor that was, and still is,

known for among his adult audiences. Nearly a century and a half later, beloved

Russian children’s artist Vladimir Radunsky and Brooklyn independent publisher

浙江省金丽衢十二校2021届高三英语下学期第二次联考试题

浙江省金丽衢十二校2021届高三英语下学期第二次联考试题 本试卷分第I卷(选择题)和第II卷(非选择题)。第I卷1至6页,第II卷7至8页。满分150分,考试用时120分钟。考试结束,将本试卷和答题卡一并交回。 第I卷(选择题) 注意事项: 1.答第I卷前,考生务必将自己的姓名、准考证号填写在答题卡上。 2.选出每小题答案后,用铅笔把答题卡上对应题目的答案标号涂黑。如需改动,用橡皮擦 干净后,再选涂其他答案标号。不能答在本试卷上,否则无效。 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一小题。每段对话仅读一遍。 1 What color are Julice's shoes? A. Black. B. Brown. C. Dark blue. 2. Who dies in the story? A. The dragon. B. The soldier. C. The princess. 3. Which animal is in the field? A. A sheep. B. A cow. C. A horse. 4.What is the woman going to do this evening? A. Go on a trip. B. Attend a concert. C. Look after her brother. 5. What is the homework for next Tuesday? A. Writing an essay. B. Reading the textbook. C. Listening to some radio programs. 第二节(共15小题;每小题15分,满分225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.Where are the speakers? A: At their house. B. At a museum. C. At a restaurant, 7. What is the man interested in? A. Rock music. B. History. C. Diet. 听第7段材料,回答第8至10题。 8. When is the big game? A. Today. B. Tomorrow. C. In three days. 9. Why is the girl planning not to go to soccer practice? A. She isn't given her uniform. B. She doesn't think it's important. C. She is busy with her studies. 10. What will make the girl's mother angry? A. Losing her uniform. B. Not passing an exam. C. Missing a sports game. 听第8段材料,回答第11至13题。

浙江省金丽衢十二校2018届高三第二次联考数学试题(含答案)

2017-2018学年浙江省金丽衢十二校高三(上)第二次联考数学试卷 一、选择题(共10小题,每小题4分,满分40分) 1.设集合M={x|},N={x|0<x<2},则M∪N=() A.[0,1)B.(0,1) C.[0,2) D.(0,2) 2.若双曲线的两条渐近线相互垂直,则它的离心率是() A.B.C.2 D. 3.某四面体的三视图如图所示,正视图、左视图都是腰长为2的等腰直角三角形,俯视图是边长为2的正方形,则此四面体的最大面的面积是() A.2 B.C.D.4 4.函数f(x)=Asin(ωx+φ)(A>0,ω>0,|φ|<)的图象如图,则φ=()A.B.C.D. 5.已知(﹣1+3i)(2﹣i)=4+3i(其中i是虚数单位,是z的共轭复数),则z的虚部为()A.1 B.﹣1 C.i D.﹣i 6.已知正项数列{a n}中,a1=1,a2=2,(n≥2),则a6=() A.B.4 C.16 D.45 7.用0,1,2,3,4可以组成的无重复数字的能被3整除的三位数的个数是()A.20 B.24 C.36 D.48 8.如果存在正实数a,使得f(x+a)为奇函数,f(x﹣a)为偶函数,我们称函数f(x)为“Θ函数”.给出下列四个函数: ①f(x)=sinx ②f(x)=cosx ③f(x)=sinx﹣cosx ④f(x)=sin2(x+).其中“Θ函数”的个数为() A.1 B.2 C.3 D.4

9.设a>b>0,当+取得最小值c时,函数f(x)=|x﹣a|+|x﹣b|+|x﹣c|的最小值为() A.3 B.2 C.5 D.4 10.如图,正方体ABCD﹣A1B1C1D1的棱长为1,线段线段B1D1上有两个动点E,F,且EF=0.6,则当E、F移动时,下列结论中错误的是() A.AE∥平面C1BD B.四面体ACEF的体积为定值 C.三棱锥A﹣BEF的体积为定值 D.异面直线AF、BE所成的角为定值 二、填空题(共7小题,每小题6分,满分36分) 11.若f(x)为偶函数,当x≥0时,f(x)=x(1﹣x),则当x<0时,f(x)=;方程[5f(x)﹣1][f(x)+5]=0的实根个数为. 12.在的展开式中,常数项为;系数最大的项是. 13.已知向量,满足,,与的夹角为,则=;与的夹角为. 14.函数f(x)=x2+acosx+bx,非空数集A={x|f(x)=0},B={x|f(f(x))=0},已知A=B,则参数a 的所有取值构成的集合为;参数b的所有取值构成的集合为. 15.已知直线m,l,平面α,β,且m⊥α,l?β,给出下列命题: ①若α∥β,则m⊥l; ②若α⊥β,则m∥l; ③若m⊥l,则α∥β ④若m∥l,则α⊥β 其中正确的命题的序号是. (注:把你认为正确的命题的序号都填上).

2019年3月浙江省学考选考浙江省金丽衢十二校2018-2019学年第二学期高三第三次联考地理试题

地理试题卷 第1页 (共8页)保密★考试结束前 金丽衢十二校2018学年高三第三次联考 地 理 试 题 命题人:缙云中学 李建友 李丽钦 金静杨 考生须知: 1.本试卷分选择题和非选择题两部分,共8页,满分100分,考试时间90分钟。其中加试 题部分为30分,用【加试题】标出。 2.考生答题前,务必将自己的姓名、准考证号用黑色字迹的签字笔或钢笔填写在答题纸上。3.选择题的答案须用2B 铅笔把答题纸上对应题目的答案标号涂黑。如要改动,须将原填涂 处用橡皮擦净。 4.非选择题的答案须用黑色字迹的签字笔或钢笔写在答题纸上相应区域内,答案写在本试 题卷上无效。 选择题部分 一、选择题(本大题共25小题,每小题2分,共50分。每小题列出的四个备选项中只有一 个是符合题目要求的,不选、多选、错选均不得分) 近几年出现“反向春运”现象,就是年轻人把老家父母和孩子接到自己工作的城市过年,节后再送回老家。完成1—2题。 1.下列与春运现象的产生相关性最小是 A .经济发展差异 B .传统思想观念 C .平时假日较少 D .自然环境差异 2.有关“反向春运”说法正确是 A .对城市不存在任何压力 B .利于缓解运输压力 C .与人们的观念转变无关 D .利于减少家庭支出3.月球上没有极光现象,主要是由于 A .磁场较强 B .距地球近 C .月球质量小 D .昼夜温差大研究表明,葡萄在成熟期积温相对越高、光照越充足,糖含量会越高。读图完成4—5题。4.据图可知,下列地区葡萄相对更甜是 A .山东烟台 B .云南蒙自 C .宁夏银川 D .新疆吐鲁番 5.下列关于全球气候变暖对我国葡萄的影响 说法正确是 A .糖分逐渐下降 B .种植区域北移 C .生育周期变长 D .产量明显上升 第4、5 题图

2018年8月浙江省学考选考金丽衢十二校高三联考技术答案

2018学年金丽衢十二校高三第一次联考 信息技术参考答案 一、选择题(每题有一个正确的选项,每题2分,共24分) 二、非选择题(本大题共5小题,其中第13小题4分,第14小题5分,第15小题8分, 第16小题3分,第17小题6分,共26分) 13.(1)选中A1:I1 在单元格格式设置中设置合并居中或相近答案(1分)(2)2017年(1分) (3)A2,C2:H2,A22:A23,C22:H23 或相同区域(1分) (4)=COUNTIF(H3,$H$3:$H$23)或=COUNTIF(H3,H$3:H$23)(1分)14.(1) B (1分) (2)①s = Text1.Text (1分) ②result + Mid(dw, m - 7, 1) (2分) (3)东北3西南5 (1分) 15.(1)BC (选对一个给1分,错选多选不给分)(2分) (2)选中音乐图层任意一帧设置声音属性为数据流(1分)并删除音乐图层第57帧到100帧或在音乐图层第57帧插入关键帧(空白关键帧)或其他正确的描述(1分)(3)影片剪辑元件(1分) (4)动画补间动画(1分) (5)“on (press) {gotoAndStop("主场景",1);} 或on (release) {gotoAndStop("主场景",1);} (1分) (6)选择“近石1”图层第15帧执行清除关键帧的操作或其他正确的描述(1分)16.(1)程序中①处应改为bb(i) = zb(n) (1分) (2)程序中②处应改为pos To pos + ld – 2 (2分) 17.(1)2 16 25 68(1分) (2)程序中①处填入的是mstep = mstep + a(i + 1) - a(i) (2分) 程序中②处填入的是tmax = t (2分) 程序中③处填入的是flag = False (1分) 信息技术参考答案第1页(共1页)

浙江省金丽衢十二校2019-2020学年高三第一次联考数学试题

2019学年淅江金丽衢十二第一次联考 1.设集合{}{}|(3)(2)0,,|13,M x x x x R N x x x R =+-<∈=≤≤∈,则M N ?=( ) A. [)1,2 B. [1,2] C. (]2,3 D. [2,3] 2.已知双曲线22 22:1(0,0)x y C a b a b -=>>一条渐近线与直线2420x y -+=垂直,则该双曲线的离心率为( ) A. B. C. D. 3.若实数x ,y 满足约束条件2202 2x y x y y +-≥??+≤??≤? ,则x y -的最大值等于( ) A. 2 B. 1 C. -2 D. -4 4.已知一几何体的三视图如图所示,则该几何体的体积为( ) A. 163 π+ B. 112π+ C. 1123π+ D. 143π+ 5.己知a ,b 是实数,则“2a >且2b >”是“4a b +>且4ab >” ( ) A. 充分而不必要条件 B. 必要而不充分条件 C. 充要条件 D. 既不充分也不必要条件 6.口袋中有5个形状和大小完全相同的小球,编号分别为0,1,2,3,4,从中任取3个球,以ξ表示取出球的最大号码,则()E ξ=( ) A 3.55 B. 3.5 C. 3.45 D. 3.4 7.如图,在正四棱柱1111ABCD A B C D -中, 13,4,AB AA P ==是侧面11BCC B 内的动点,且1,AP BD ⊥记.

AP 与平面1BCC B 所成的角为θ,则tan θ的最大值为 A. 43 B. 53 C. 2 D. 259 8.己知函数()()21,043,0x e x f x x x x +?≤?=?+->?? ,函数()y f x a =-有四个不同的零点,从小到大依次为1x ,2x ,3x ,4x ,则1234x x x x -++的取值范围为( ) A. [)3,3e + B. [)3,3e + C. ()3,+∞ D. (]3,3e + 9.函数()21ln f x x x =-+的图像大致为( ) A. B. C. D. 10.设等差数列1a ,2a ,…,n a (3n ≥,*N n ∈)的公差为d ,满足1211n a a a a ++???+=-2121122n a a a a +-+???+-=+++2n a m +???++=,则下列说法正确的是( )

金丽衢十二校2015学年高三第二次联考数学试卷(文科)

1 / 8 保密★考试结束前 金丽衢十二校2015学年高三第二次联考 数学试卷(文科) 命题人:高雄略 王飞龙 审题人:卢 萍 郑惠群 本试卷分第Ⅰ卷和第Ⅱ卷两部分.考试时间120分钟. 试卷总分为150分.请考生将所有试题的答案涂、写在答题纸上. 第Ⅰ卷 一、选择题:本大题共8小题,每小题5分,共40分. 在每个小题给出的四个选项中,只 有一项是符合题目要求的. 1. 直线x +(1-m )y+3=0(m 为实数)恒过定点( ▲ ) A .(3,0) B .(0,-3) C .(-3,0) D .(-3,1) 2. 平面向量a =(1,x ),b =(-2,3),若a // b ,则实数x 的值为( ▲ ) A .-6 B .23 C .- 32 D .0 3. 某几何体的三视图如图所示(单位:cm ),则该几何体的体积等于( ▲ ) cm 3 A .4+2 3π B .4+32π C . 6+2 3 π D . 6+32 π 4. 函数f (x )=sin x (sin x +3cos x )的最大值为 ( ▲ ) A .2 B .1+ 3 C .32 D .1 5. 已知a , b , c 是正实数,则“b ≤ac ” 是“a+c ≥2b ”的( ▲ ) (第3题图) 俯视图 正视图 侧视图

2 / 8 D A B C D 1 (第6题图) x y O B P F (第13题图) A .充分不必要条件 B . 必要不充分条件 C .充要条件 D . 既不充分也不必要条件 6.如图,将四边形ABCD 中△ADC 沿着AC 翻折到AD 1C ,则翻折过程中线段DB 中点M 的 轨迹是( ▲ ) A .椭圆的一段 B .抛物线的一段 C .一段圆弧 D .双曲线的一段 7.设等差数列{a n }的前n 项和为S n ,若数列{a n }是单调递增数列, 且满足a 5≤6,S 3≥9,则a 6的取值范围是( ▲ ) A .(3, 6] B .(3, 6) C .[3, 7] D .(3, 7] 8.设函数f (x )=ax2+bx+c(a , b , c ∈R )的定义域和值域分别为A ,B ,若集合{(x ,y )|x ∈A ,y ∈B }对应的平面区域是正方形区域,则实数a , b , c 满足( ▲ ) A .|a|=4 B .a = -4且b 2+16c >0 C .a <0且b 2+4ac ≤0 D .以上说法都不对 第Ⅱ卷 二、填空题:本大题共7小题,多空题每题6分,单空题每题4分,共36分. 9.计算: = ▲ , = ▲ . 10.若焦点在x 轴上的椭圆的焦距为16,长轴长为18,则该椭圆的标准方程为 ▲ . 11.已知函数f (x )=A sin(2x +φ)(A >0),其中角φ的终边经过点P (-1, 1),且0<φ<π. 则φ= ▲ , f (x )的单调减区间为 ▲ . 12.设a ∈R ,函数f (x )=???2x+a,x≥0,g(x), x<0 为奇函数,则a = ▲ ,f (x )+3=0的解为 ▲ . 13.如图,双曲线C : =1(a , b >0)虚轴上的端点B (0, b ),右焦点F ,若以B 为圆心 的圆与C 的一条渐近线相切于点P ,且,则该双曲线 的离心率为 ▲ . 14.若实数x ,y 满足x +y -xy ≥2,则|x -y |的最小值是 ▲ .

浙江省金丽衢十二校2020届高三数学上学期第二次联考试卷

金丽衙十二校2020学年高三第二次联考 数学试题 一、选择题(本大题共10小题,每小题4分,共40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、集合A={x|x 2 -2x >0},B={x|-3

8.已知a ,b ,c 和d 为空间中的4个单位向量,且a +b +c =0,则|a 一d |+|b 一d |+|c 一d | 不可能等于( ) A 、 3 B 、3 C 、4 D 、2 9.正三棱锥P -ABC 的底面边长为1 cm ,高为h cm ,它在六条棱处的六个二面角(侧面 与侧面或者侧面与底面)之和记为θ,则在h.从小到大的变化过程中,θ的变化情况 是( ) A 、一直增大 B 、一直减小 C 、先增大后减小 D 、先减小后增大, 10、数列{a n }满足:1111,n n n a a a a +==+则a 2020的值所在区间为( ) A 、(0,100) B 、 (100,200) C 、 (200,300) D 、 (300, +∞) 二、填空题(本大题共7小题,多空题每题6分,单空题每题4分,共36分) 11、《九章算术》第七章“盈不足”中第一题:“今有共买物,人出八,盈三钱;人出七,不 足四,问人数物价各几何?”借用我们现在的说法可以表述为:有几个人合买一件物 品,每人出8元,则付完钱后还多3元;若每人出7元,则还差4元才够付款.问他们

金丽衢十二校2019届高三第一次联考数学试题(Word版+答案)

金丽衢十二校2018学年高三第一次联考 数学试题 班级: 姓名: 座号: 评分: 一、选择题 1、若集合(,5)A =-∞,[3,)B =+∞,则(?R A )∪(?R B )=( ) A 、R B 、? C 、[3,5) D 、(,5)[5+-∞∞ , ) 2、已知向量(1a b == ,则向量,a b 的夹角为( ) A 、30° B 、45° C 、60° D 、90° 3、等比数列{}n a 的前n 项和为n S ,己知23S =,415S =,则3S =( ) A. 7 B 、-9 C 、7或-9 D 、638 4、双曲线22941y x -=的渐近线方程为( ) A 、49y x =± B 、94y x =± C 、23y x =± D 、32 y x =± 5.己知一个几何体的三视图如图所示,则该几何体的体积为( ) A 、 43 B 、83 C 、163 D 、323 6.己知复数z 满足5 2 (3)zi i π=+,则z 在复平面内对应的点位于( ) A 、第一象限 B.第二象限 C.第三象限 D 、第四象限 7.设函数()f x 的定义域为D ,如果对任惫的x ∈D ,存在y ∈D ,使得()()f x f y =-成立,则称 函数()f x 为“H 函数”,下列为“H 函数”的是( ) A 、2 sin cos cos y x x x =+ B 、ln x y x e =+ C 、 2x y = D 、2 2y x x =- 8.如图,二面角BC αβ--的大小为6 π ,AB α?,CD β?,且AB BD =CD =2, ∠ABC = 4π,∠BCD =3π ,则AD 与β所成角的大小为( ) A 、4π B 、3π C 、6 π D 、12π

(完整版)浙江省金丽衢12校2018届高三9月联考英语试题

浙江省金丽衢12校2018届高三9月联考 英语试题 第I卷 第一部分:听力(共两节,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. Where does the conversation take place? A. In a classroom. B. In a restaurant. C. In a library. 2. How many seats will be left empty? A. 2. B. 3. C. 5. 3. What did the man do today? A. He took a walk. B. He worked on his car. C. He went to see the doctor. 4. Where is the computer? A. In the box. B. On the desk. C. On the dining table. 5. What are the speakers talking about? A. A friend. B. A surprise party. C. A birthday gift. 第二节(共15小题;每小题1.5分,满分22.5分) 听下面5段对活或独白。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 is the color of the skirt the woman bought yesterday? A. Red. B. Blue. C. Green. 7. Why didn’t the woman lake the yellow skirt? A. It was not big enough. B It was too bright. C. It was expensive. 听第7段材料,回答第8、9题。 8 What do we know about the man?

浙江省 金丽衢十二校第二次联考-高三 数理

数学试题卷(理科) 第1页(共4页) 金丽衢十二校2015学年高三第二次联考 数学试卷(理科) 命题人:高雄略 王飞龙 审题人:卢 萍 郑惠群 本试卷分第Ⅰ卷和第Ⅱ卷两部分.考试时间120分钟. 试卷总分为150分.请考生将所有试题的答案涂、写在答题纸上. 第Ⅰ卷 一、选择题:本大题共8小题,每小题5分,共40分.在每小题给出的四个选项中,只有一 个选项是符合题目要求的. 1.平行直线l 1:3x +4y -12=0与l 2:6x +8y -15=0之间的距离为( ▲ ) A .310 B .910 C .35 D .95 2.命题“?α∈[0, +∞),sin α>α”的否定形式是( ▲ ) A .?α∈[0, +∞),sin α≤α B .?α∈[0, +∞),sin α≤α C .?α∈(-∞,0),sin α≤α D .?α∈(-∞,0),sin α>α 3.某几何体的三视图如图所示(单位:cm ), 则该几何体的体积等于( ▲ ) cm 3 A .4+2 3π B .4+32π C .6+23 π D .6+32 π 4.若直线l 交抛物线C :y 2=2px (p>0)于两不同 点A ,B ,且|AB |=3p ,则线段AB 中点M 到y 轴距离的最小值为( ▲ ) A .p 2 B . p C .3p 2 D .2p 5.已知φ是实数,f (x )=cos x ﹒cos(x +π 3 ) ,则 (第3题图) 俯视图 正视图 侧视图

数学试题卷(理科) 第1页(共4页) D A B C D 1 (第6题图) “φ=π 3”是“函数f (x )向左平移φ个单位后关于y 轴对称”的( ▲ ) A .充分不必要条件 B .必要不充分条件 C .充要条件 D .既不充分也不必要条件 6.如图,将四边形ABCD 中△ADC 沿着AC 翻折到AD 1C ,则翻折过程中线段DB 中点M 的 轨迹是( ▲ ) A .椭圆的一段 B .抛物线的一段 C .一段圆弧 D .双曲线的一段 7.已知双曲线C : 222 2 x y a b - =1(a , b >0)虚轴上的端点B (0, b ),右焦点F , 若以B 为圆心的圆与C 的一条渐近线相切于点P ,且//, 则该双曲线的离心率为( ▲ ) A .5 B .2 C .1+3 2 D .1+52 8.已知非零正实数x 1, x 2, x 3依次构成公差不为零的等差数列.设函数f (x )=x α,α∈{-1, 1 2 , 2, 3}, 并记M ={-1, 1 2 , 2, 3}.下列说法正确的是( ▲ ) A .存在α∈M ,使得f (x 1) , f (x 2) , f (x 3)依次成等差数列 B .存在α∈M ,使得f (x 1), f (x 2), f (x 3)依次成等比数列 C .当α=2时,存在正数λ,使得f (x 1), f (x 2), f (x 3)- λ依次成等差数列 D .任意α∈M ,都存在正数λ>1,使得λf (x 1), f (x 2), f (x 3)依次成等比数列 第Ⅱ卷 二、填空题:本大题共7小题,多空题每题6分,单空题每题4分,共36分. 9.设集合A ={x ∈N |6 x +1∈N },B ={x |y =ln(x -1)},则A = ▲ ,B = ▲ ,)(B C A R = ▲ . 10.设函数f (x )=A sin(2x +φ),其中角φ的终边经过点P (-1,1),且0<φ<π,f (π 2 )= -2.则φ= ▲ , A = ▲ ,f (x )在[-π2, π 2 ]上的单调减区间为 ▲ . 11.设a >0且a ≠1,函数f (x )=???a x +1 -2,x ≤0, g (x ), x >0 为奇函数,则a = ▲ ,g (f (2))= ▲ . 12.如图,在直三棱柱ABC -A 1B 1C 1中,AB =BC =CC 1=2,AC =23, M 是AC 的中点,则异面直线CB 1与C 1M 所成角的余弦值为 ▲ . 13.设实数x ,y 满足x +y -xy ≥2,则|x -2y |的最小值为 ▲ . A C A 1 M B B 1 (第12题图) C 1

浙江省金丽衢十二校2018-2019学年高三数学第二次联考试卷

第1页,总18页 …………○…………外…………○…………装…………○…………订…………○…………线…………○………… 姓名:____________班级:____________学号:___________ …………○…………内…………○…………装…………○…………订…………○…………线…………○………… 浙江省金丽衢十二校2018-2019学年高三数学第二次联考试 卷 考试时间:**分钟 满分:**分 姓名:____________班级:____________学号:___________ 题号 一 二 三 总分 核分人 得分 注意 事项 : 1、 填 写 答 题 卡 的 内 容 用 2B 铅 笔 填 写 2、提前 15 分钟收取答题卡 第Ⅰ卷 客观题 第Ⅰ卷的注释 评卷人 得分 一、单选题(共10题) 1. 集合 , ,则( ) A . B . C . D . 2. 点 和 是双曲线 的两个焦点,则 ( ) A . B . 2 C . D . 4 3. 复数 , ,则 ( ) A . 5 B . 6 C . 7 D . 4. 某几何体的三视图如图所示(图中单位: ),则该几何体的表面积为( )

答案第2页,总18页 ………○…………外…………○…………装…………○…………订…………○…………线…………○………… ※※请※※不※※要※※在※※装※※订※※线※※内※※答※※题※※ ………○…………内…………○…………装…………○…………订…………○…………线…………○………… A . B . C . D . 5. 已知直线 平面 ,直线 平面 ,则“ ”是“ ”的( ) A . 充分不必要条件 B . 必要不充分条件 C . 充要条件 D . 既不充分也不必要条件 6. 甲和乙两人独立的从五门选修课课程中任选三门进行学习,记两人所选课程相同的门数为 ,则 为( ) A . 1.2 B . 1.5 C . 1.8 D . 2 7. 函数 的图像大致为( ) A . B . C . D . 8. 已知 , , 和 为空间中的4个单位向量,且 ,则 不可能 等于( ) A . 3 B . C . 4 D . 9. 正三棱锥 的底面边长为 ,高为 ,它在六条棱处的六个二面角(侧面与侧面或者侧面与底面)之和记为 ,则在 从小到大的变化过程中, 的变化情况是( ) A . 一直增大 B . 一直减小 C . 先增大后减小 D . 先减小后增大 10. 数列 满足: , ,则 的值所在区间为( ) A . B . C . D .

浙江省金丽衢十二校2018届高三第二次联考数学试题含

学年浙江省金丽衢十二校高三(上)第二次联考 数学试卷 一、选择题(共10小题,每小题4分,满分40分) 1. 设集合M={x| },N={x|0<x<2},则M∪N=() A. [0,1) B. (0,1) C. [0,2) D. (0,2) 【答案】C 【解析】分析:解分式不等式得集合M,再根据集合的并集定义得结果. 详解:因为,所以, 因此M∪N= [0,2), 选C. 点睛:集合的基本运算的关注点 (1)看元素组成.集合是由元素组成的,从研究集合中元素的构成入手是解决集合运算问题的前提. (2)有些集合是可以化简的,先化简再研究其关系并进行运算,可使问题简单明了,易于解决. (3)注意数形结合思想的应用,常用的数形结合形式有数轴、坐标系和Venn图. 2. 若双曲线的两条渐近线相互垂直,则它的离心率是() A. B. C. 2 D. 【答案】A 【解析】双曲线两条渐近线互相垂直, ,计算得出.即为等轴双曲线. 因此,本题正确答案是. 3. 某四面体的三视图如图所示,正视图、左视图都是腰长为2的等腰直角三角形,俯视图是边长为2的正方形,则此四面体的最大面的面积是()

A. 2 B. C. D. 4 【答案】C 【解析】分析:先还原几何体,再根据锥体体积公式得结果. 详解:因为几何体为一个四面体,六条棱长分别为, 所以四面体的四个面的面积分别为 因此四面体的最大面的面积是, 选C. 点睛:1.解答此类题目的关键是由多面体的三视图想象出空间几何体的形状并画出其直观图.2.三视图中“正侧一样高、正俯一样长、俯侧一样宽”,因此,可以根据三视图的形状及相关数据推断出原几何图形中的点、线、面之间的位置关系及相关数据. 4. 函数f(x)=Asin(ωx+φ)(A>0,ω>0,|φ|<)的图象如图,则φ=() A. B. C. D. 【答案】B 【解析】分析:先根据图确定半个周期,得ω,再根据最大值求φ. 详解:因为,所以

2019届浙江省金丽衢十二校高三第一次联考数学试题Word版含解析

2019届浙江省金丽衢十二校高三第一次联考数学试题 一、单选题 1.若集合,,则() A.B.C. D. 【答案】D 【解析】根据补集和并集的定义进行求解即可. 【详解】 , 故选:. 【点睛】 本题主要考查集合的基本运算,结合补集并集的定义是解决本题的关键. 2.已知向量,,则与的夹角为() A.B.C.D. 【答案】C 【解析】利用夹角公式进行计算. 【详解】 由条件可知,,, 所以,故与的夹角为. 故选:. 【点睛】 本题考查了运用平面向量数量积运算求解向量夹角问题,熟记公式准确计算是关键,属于基础题. 3.等比数列的前项和为,己知,,则() A.7 B.-9 C.7或-9 D. 【答案】C 【解析】等比数列{a n}的前n项和为S n,己知S2=3,S4= 15,可求得公比,再分情况求首项,进而

得到结果. 【详解】 等比数列{a n}的前n项和为S n,己知S2=3,S4=15, 代入数值得到q=-2或2, 当公比为2时,解得,S3=7; 当公比为-2时,解得,S3=-9. 故答案为:C. 【点睛】 本题考查等比数列的通项公式,是基础的计算题,对于等比等差数列的小题,常用到的方法,其一是化为基本量即首项和公比或者公差,其二是观察各项间的脚码关系,即利用数列的基本性质. 4.双曲线的渐近线方程为() A.B.C.D. 【答案】C 【解析】根据题意,将双曲线的方程变形为标准方程,得、的值,由双曲线的渐近线方程分析可得答案. 【详解】 根据题意,双曲线的标准方程为, 其焦点在轴上,且,, 则其渐近线方程为; 故选:. 【点睛】 本题考查双曲线的几何性质,涉及双曲线渐近线方程的计算,注意双曲线的焦点位置,是基础题 5.已知一个几何体的三视图如图所示,则该几何体的体积为()

浙江省金丽衢十二校高三第一次联考(数学理)

2008学年金丽衢十二校高三第一次联考 数学试卷(理科) 命题人:永康一中 吴文广 陈诚 审题人:兰溪一中 胡国新 蒋志明 本试卷共150分.考试时间120分钟. 一.选择题(本大题共12小题,每小题5分.共60分.在每小题给出的四个选项中,只有一项是符合题目要求的) 1.已知全集{1,2,3,4,5,6,7}U =,{1,3,5,7}A =,{3,5}B =,则下列式子一定成的是 A .U U C B C A ? B .()()U U C A C B U ?= C .U A C B =? D .U B C A =? 2.若0ab >,则条件“a b >”是“ 11 a b >”的 A .充分而不必要条件 B .必要而不充分条件 C .充要条件 D .既不充分也不!必要条件 3.若,0()ln ,0 x e x g x x x ?≤=?>?,则1 (())2g g = A B .1 C D .ln 2- 4.tan15tan30tan15tan30++等于 A B .1 C D 5.在等差数列{}n a 中,若79416,1a a a +==,则12a 的值是 A .15 B .30 C .3 l D .64 6.关于命题:p x R ?∈,使sin x =;命题:q x R ?∈,都有2 10x x ++>.有下列结论中正确的是 A .命题“p q ∧”是真命题 B .命题“p q ∧?”是真命题 C .命题“p q ?∨”是真命题 D .命题“p q ?∨?”是假命题

7.若双曲线22 221x y a b -=的一条渐近线方程为03x y +=.则此双曲线的离心率为 A . 10 B . 3 C . D 8.“龟兔赛跑”讲述了这样的故书:领先的兔子看着慢慢爬行的乌龟,骄傲起来。睡了一觉, 当它醒来时.发现乌龟快到终点了,于是急忙追赶,但为时已晚,乌龟还是先到达了终 点…….用1S 、2S 分别表示乌龟和兔子所行的路程(t 为时问),则下图与故事情节相吻合 的是 9.定义一种运算“⊕”,对丁j 正整数n 满足以下运算: ①111⊕=; ②(1)121n n +⊕=+⊕,则1n ⊕用含n 的代数式可表示为 A .21n - B .n C .21n - D .1 2 n - 10.已知下表中的对数值有且只有一个是错误的. 其中错误的对数值是 A lg1.5 B .lg 5 C .lg 6 D .lg 8 二、填空题(本大题共7小题.每小题4分.共28分.把正确答案填在题中横线上.) 1l .抛物线2 4y x =的焦点坐标为 . 12.函数()|2|f x x x =-的单调递减区间是 . 13.若各项均为正数的等比数列{}n a 满足23123a a a =-,则公比q = . 14.若正实数a ,b 满足21a b +=,则 11 a b +的最小值是 .

浙江省金丽衢十二校2019届高三数学上学期第二次联考试卷(含参考答案)

金丽衙十二校2018-2019学年高三第二次联考 数学试题 一、选择题(本大题共10小题,每小题4分,共40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、集合A={x|x 2 -2x >0},B={x|-3

8.已知a ,b ,c 和d 为空间中的4个单位向量,且a +b +c =0,则|a 一d |+|b 一d |+|c 一d | 不可能等于( ) A 、 3 B 、 C 、4 D 、9.正三棱锥P -ABC 的底面边长为1 cm ,高为h cm ,它在六条棱处的六个二面角(侧面 与侧面或者侧面与底面)之和记为θ,则在h.从小到大的变化过程中,θ的变化情况 是( ) A 、一直增大 B 、一直减小 C 、先增大后减小 D 、先减小后增大, 10、数列{a n }满足:111 1,n n n a a a a +==+ 则a 2018的值所在区间为( ) A 、(0,100) B 、 (100,200) C 、 (200,300) D 、 (300, +∞) 二、填空题(本大题共7小题,多空题每题6分,单空题每题4分,共36分) 11、《九章算术》第七章“盈不足”中第一题:“今有共买物,人出八,盈三钱;人出七,不 足四,问人数物价各几何?”借用我们现在的说法可以表述为:有几个人合买一件物 品,每人出8元,则付完钱后还多3元;若每人出7元,则还差4元才够付款.问他们

2019届浙江省金丽衢十二校高三第二次联考数学试题(解析版)

2019届浙江省金丽衢十二校高三第二次联考数学试题 一、单选题 1.集合,,则() A.B.C.D. 【答案】B 【解析】解:A={x|x<0,或x>2},B={x|﹣3<x<3}; ∴A∩B={x|﹣3<x<0,或2<x<3},A∪B=R; ∵A∩B≠A,且A∩B≠B,∴B?A,A?B; 即B正确. 故选:B. 2.点和是双曲线的两个焦点,则() A.B.2 C.D.4 【答案】D 【解析】根据双曲线方程可求焦距,即可得. 【详解】 由可知 所以,则, 所以. 【点睛】 本题主要考查了双曲线的方程,双曲线的简单几何性质,属于中档题. 3.复数,,则() A.5 B.6 C.7 D. 【答案】D 【解析】根据复数模的性质知,即可求解. 【详解】

因为,, 所以 故选D. 【点睛】 本题主要考查了复数模的性质,属于中档题. 4.某几何体的三视图如图所示(图中单位:),则该几何体的表面积为() A.B.C.D. 【答案】B 【解析】试题分析:由三视图可知,该几何体的直观图为一个竖立的圆锥和一个倒立的圆锥组成,其表面积为,选B. 【考点】1.三视图;2.表面积. 5.已知直线平面,直线平面,则“”是“”的() A.充分不必要条件B.必要不充分条件C.充要条件D.既不充分也不必要条件 【答案】A 【解析】试题分析:根据已知题意,由于直线平面,直线∥平面,如果两个平面平行,则必然能满足,但是反之,如果,则对于平面可能是相交的,故条件能推出结论,但是结论不能推出条件,故选A 【考点】本试题主要是考查了立体几何中点线面的位置关系运用。 点评:解决该试题的关键是利用面面平行的性质定理和线面平行、垂直的性质定理来熟练的判定其位置关系,同时结合了充分条件的概念,来判定命题的条件和结论之间的关系运用,属于基础题。 6.甲和乙两人独立的从五门选修课课程中任选三门进行学习,记两人所选课程相同的

浙江省金丽衢十二校2020高三数学第一次联考试题(含解析)

浙江省金丽衢十二校2020届高三数学第一次联考试题(含解析) 1.设集合{}{}|(3)(2)0,,|13,M x x x x R N x x x R =+-<∈=≤≤∈,则M N ?=( ) A. [ )1,2 B. [1,2] C. (] 2,3 D. [2,3] 【答案】A 【解析】 因为{}{}|(3)(2)0,{|32},|13,M x x x x R x x N x x x R =+-<∈=-<<=≤≤∈,因此可知M N ?=[ )1,2,选A 2.已知双曲线22 22:1(0,0)x y C a b a b -=>>一条渐近线与直线2420x y -+=垂直,则该双曲线的 离心率为( ) D. 【答案】A 【解析】 【分析】 先求得渐近线的方程,利用两条直线垂直斜率相乘等于1-列方程,结合222c a b =+求得双曲线离心率. 【详解】由题可知双曲线的渐近线方程为b y x a =± ,则112b a -?=-,即2b a = ,又,所以e ==故选A. 【点睛】本小题主要考查双曲线的渐近线以及离心率的求法,考查两条有斜率的直线相互垂直时,斜率相乘等于1-,属于基础题. 3.若实数x ,y 满足约束条件22022x y x y y +-≥?? +≤??≤? ,则x y -的最大值等于( ) A. 2 B. 1 C. -2 D. -4

【答案】A 【解析】 【分析】 作出可行域,平移目标函数,找到取最大值的点,然后可求最大值. 【详解】根据题意作出可行域如图: 平移直线:0l x y -=可得在点A 处取到最大值,联立220 20 x y x y +-=??+-=?可得(2,0)A ,代入x y -可得最大值为2,故选A. 【点睛】本题主要考查线性规划,作出可行域,平移目标函数,求出最值点是主要步骤,侧重考查直观想象和数学运算的核心素养. 4.已知一几何体的三视图如图所示,则该几何体的体积为( ) A. 163 π + B. 112 π + C. 1123 π + D. 143 π + 【答案】C 【解析】 【分析】

相关文档
相关文档 最新文档