2019-2020年高二下学期第8周定时训练物理试题缺答案

1、2019-2020年高二下学期第8周定时训练物理试题缺答案、选择题:1、一个笔帽竖立在桌面上平放的纸条上，要求把纸条从笔帽下抽出，如果缓慢拉动纸条笔帽）缓慢拉动纸条时，纸条对笔帽的水平快速拉动纸条时，纸条对笔帽的水平必倒；若快速拉纸条，笔帽可能不倒。这是因为（ TOC o 1-5 h z 缓慢拉动纸条时，笔帽受到冲量小B作用力小C.快速拉动纸条时，笔帽受到冲量小D作用力小2、 下列说法中不正确的是（）物体的运动状态改变，其动量一定改变物体的动量发生了改变，则合外力一定对物体做了功如果物体在任何相等的时间内，受到相同的冲量，则物体一定作匀变速运动如果物体是在恒定的合外力作用下运动，则单位时间内动

2、量的增量与物体的质量无关。3、 如图所示，光滑水平面上有质量相等的A和B两个物体，B上装有一轻质弹簧，B原来静止，A以速度v正对着B滑行，当弹簧压缩到最短时,B物体的速度为（A、v/2 ; B、v/3 ; C v ; D 2vv77/7/77ZZ7AQ_Z / / ZnlB4、 A、B两球在光滑水平面上作相向运动，已知ra nm,当两球相碰后，其中一球停止，则可以断定（）A.碰前A的动量与B的动量大小相等B.碰前A的动量大于B的动量C.若碰后A的速度为零，则碰前 A的动量大于B的动量D .若碰后B的速度为零，则碰前 A 的动量大于B的动量5、 光滑水平面上有甲、乙两根条形磁铁，N极相对，轴线在

3、同一直线上，轻推一下使它们相向运动，某时刻 V甲=2m/s, V乙=3m/s。磁铁质量 m甲=1kg, m乙=0. 5kg。乙反向时，甲的速度为零.甲、乙相距最近时速度均为.乙反向时，甲的速度为0.5m/s，方向不变.甲、乙相距最近时速度均为零1/3m/s。上述叙述中正确的有（A.B . C . D.，罠m( M6、如图所示，质量为 M的物体P静止在光滑的水平桌面上，有另一质量为m）的物体Q以速度V。正对P滑行，则它们相碰后（设桌面足够大）（A. Q物体一定被弹回，因为M m.Q物体可能继续向前C. Q物体速度不可能为零若相碰后两物体分离，则过一段时间可能再碰。二、填空题:7、质量为M的汽车拖

4、挂一辆质量为m的拖车在平直的水平公路上以速度V0做匀速直线运动,它们所受的运动阻力与其重力成正比,某时刻拖车脱钩，汽车的牵引力保持不变，在拖车刚刚停下的瞬间，汽车速度大小为8、一个物体同时受到两个力 F1、F2的作用，F1、F2与时间t的关系如图所示，如果该物体从静止开始运动，当该物体具有最大速度时，物体运动的时间是s;物体的最大动量是kg-m/s。9、光滑水平面上有 AB两球沿同一直线运动，碰撞后两球粘在一起。已知碰撞前它们的动量分别为pA= +12kg m/s, pB= +28kg m/s，碰撞后 A球的动量增加了 12 kg m/s，则可知碰撞前A、B两球的速度之比为二、计算题:10、一

5、个质量为 m的玩具蛙，蹲在质量为M的小车的细杆上，小车放在光滑的水平面上. 若 车长为I，细杆高为h,且位于小车的中点，如图所示，试求当玩具蛙最小以多大的水平速度v跳出，才能落到桌面上.11、两块高度相同的木块A和B,紧靠着放在光滑的水平面上，其质量分别为mi= 2kg,0.9kg。它们的下底面光滑，但上表面粗糙。另有一质量m= 0.1kg的物体C（可视为质点）以vc= 10m/s的速度恰好水平地滑动 A的上表面，物体 C最后停在B上，此时 B C的共同速 度v = 0.5m/s,求木块A的速度为多大？V0CAB2019-2020年高二下学期第一学段段中检测英语试题含答案考试时间：90分钟 冉

6、彤 审核：赵良璧一、单项选择（共15小题，每小题1分，满分15分） Can I have a day off tomorrow, Mr. Johnson?can man age without you.Forget itB. rm afraid notC. It dependsD. Of courseThe Smiths dont usually like stay ing athotelsbut last summer they spe nt afew days at a very nice hotel bysea./； aB. the； the C. /; theD. the； aIm c

7、alli ng about the apartme nt youthe other day. Could you tell me moreabout it?advertisedB. had advertisedC . are advertis ingD . will advertiseWang Gang is considering buying a puter, is considered to be a greathelp in our work and study.A. asB. whichC. thatD. whatTom was very angry aboutto Mary par

8、byirthdaynot in vit ingB. being not in vitedC. not being in vitedD. not to be in vitedNowadays, there is ain crease in childre ns creativity for they are greatlyen couraged to develop their tale nts.sharpB. slightC.naturalD.modest7.1 had hardly got to the officemy wife pho ned me to go back home at

9、on ce.A.whenB. thanC.untilD.afterYoupay too much attention to your reading skill, as it is so important.A .should ntB. cantC .must ntD. need ntI can see, there is only one way to solve this problem.A. As far asB. Eve n ifC. As long asD. As soon asWith the guidethe way, we fin ally got to the village

10、 which we werelook ing for.A. ledB. leadi ngC. to leadD. had ledHalf a month later, he found his lost motorcyclein the woods off thehighway.A. aba ndonedB . ren tedC . don atedD . refusedThe fire madedifficult to rescue the people trapped un der the ruins in theearthquake.A. oneB. thisC. thatD. itTh

11、e museum will open in the spring with an exhibition and a viewing platformvisitor can watch the big glasshouses being built.A . whatB . whereC . whe nD . whyIt will be a big help if you go to the store and get what we need fordinner., ril set the table.A . As a resultB . On the wholeC . In the mea n

12、whileD . As a matter of factmakes the book so extraordi nary is the creative imag in ati on of the writer.A. ThatB. WhatC.WhoD. Which二、完型填空（共15小题，每小题1分，满分15分）Zigfried , a little mouse, blew his breath on the frosty window of the farmhouse and rubbed it to see the outside. Still no body came. Maybe t

13、oday, he thought _16_.It was only a few days before Christmas and he was watching for miracle （奇迹）.This farmhouse had bee n _17_ too long. It n eeded a family. Zigfrieds _18_ made a no ise. He realized that he had nt eate n anything since yesterday. He jumped from the windowsill （窗沿）,grabbed a bag f

14、rom his home, and went next door to Farmer Mikes.Farmer Mikes house had bee n a great place for the little mouse _19_ the farmer married a wife who had a cat. Zigfried _20_ when he thought of it. He looked around cautiously as he stole into the room where grain was stored and was quite _21_ as he fi

15、lled his bag with wheat. He was turning to leave when suddenly he22_ a hot breath about his ear. His heart beat _23_, and without thinking he started to run and luckily _24_ the catgaws （爪子）.The n ext after noon Zigfried heard some good n ews： a _25_ family would be moving into the farmhouse soon. Z

16、igfrieds granny would arrive on Christmas Eve to _26_ with him. He hoped that the family would e before his granny came. Before long, a car came up the road leading to the housewith butter sandwiches, cheese and chocolate.Zigfrieds Christmas miracle did arrive!The house came _27_ the n ext few days.

17、 Zigfried _28_ every sin gle hour of them. However, the day before Christmas when he was drinking hot chocolate with a _29_ smile at the door of his home, he heard the discussion of the children of the family about what they might get for Christmas. What ? A cat? The _30_ froze on his face； his mout

18、h fell wide open. After a long while , he at last found his voice：“ Hey Whose Christmas miracle is this ”16.A. carefullyB. hopefullyC. excitedlyD.proudly17.A. shabbyB. no isyC. emptyD.messy18.A. mouthB. noseC. stomachD.throat19.A. althoughB. uni essC. whereasD.until20.A. leaptB. sniffedC. trembledD.

19、withdrew21.A. curiousB. pitifulC. n ervousD.sen sible22.A. tookB. releasedC. feltD.drew23.A. stro nglyB. irregularlyC. slowlyD. wildly24.A. seizedB. escapedC. rubbedD.scratched25.A. closeB. happyC. newD.young26.A. celebrateB. muni cateC. peteD.promise27.A. aliveB. looseC. openD.still28.A. coun tedB.

20、 missedC. enjo yedD.wasted29.A. bitterB. forcedC. politeD.satisfied30.A. bloodB. sweatC. tearD.smile三、阅读理解（共10小题:,每小题2分，满分20分）ABelow is a selection from a popular sciencebook.If blood is red, why are veins （静脉）blue?Actually , veins are not blue at all. They are more of a clear yellowish colour.Altho

21、ugh blood looks red when its outside the body when its sitting in a vein near the surface of the skir, its more of a dark reddish purple colour. At the right depth these bloodfilled veins reflect less red light than the surrounding skin, making them look blue by paris on.Which works harder , your he

22、art or your brain?That ki nd of depe nds on whether youre busy thi nki ng or busy exercis ing. Youi heart works up to three times harder duri ng exercis,ea nd shifts eno ugh blood over alifetime to fill a supertanker. But in the long run, your brain probably tips it , because even when youre sitting

23、 still your brain is using twice as much energy as yourheart, and it takes four to five times as much blood to feed it.Why does spinning make you dizzy（眩晕的）？Because your brain gets con fused betwee n what youre see ing and what your feeli ng. The brain sen ses that youre spinning using special gravi

24、ty-a ndmotio n-se nsi ng orga ns in your inner earwhich work together with yourvisi on and bala nee stable.the system goes out of control, and your brain thinks youre moving while youre not!Where do feelings and emotions e fromMostly from an ancient part of the brain called the limbic system. All ma

25、mmals have this brain area from mice to dogs, cats, and humans. So all mammals feel basic emotions like fear pain and pleasure. But since human feeling also invoIve other, newer bits of the brain , we feel more plex emotions than any other ani mal on the pla net.What is the colour of blood in a vein

26、 near the surface of the skin?A. Blue. B. Dark reddish purple. C. Red. D. Light yellow.Which of the following statements about our brain is true?The brains of the other mammals are as plex as those of humans.When our brain senses the spinning we will feel dizzy.C . In the long run, our brain probabl

27、y works harder than our heart.D . Our feeli ngs and emoti ons e from the most developed area in our brai n.33 . What is the mai n purpose of the select ion?A . To provide in formati on about our body.B . To give advice on how to stay healthy.C . To challe nge new findings in medical research.D . To

28、report the latest discoveries in medical scie nee.BDown-to-earth means being honest, open, and easy to deal with. It is a pleasure to find some one who is dow n-to-earth. A pers on who is dow n-to-earth is easy to talk to. He or she accepts others as equals. A down-to-earth person may be an importan

29、t member of society, of course, but they do not let their importa nee go to their heads, and they do not consider themselves to be better than others who are less important. Some one who is filled with self-importa nce and pride, ofte n without cause, is said to have his nose in the air. There is no

30、 way a person with his nose in the air can be dow n-to-earth.America ns use ano ther expressi on that is similar in some way to dow n-to-earth. The expressi on is both feet on the ground. Some one with both feet on the ground is a pers on with a good un dersta nding of reality. He has what is called

31、 mon sen se. He may have dreams but he does not allow them to block his kno wledge of what is real. The opposite kind of pers on is one who has his head in the clouds. A man with his head in the clouds is a dreamer whose mind is not in the world. Sometimes such a dreamer can be brought back to reali

32、ty; sharp words from the teacher, for example, can usually get a daydream ing stude nt to put both feet back on the ground.The pers on who is dow n-to-earth usually has both feet on the ground. But the opposite is not always true. Some one with both feet on the ground may not be as ope n and easy to

33、 deal with as some one who is dow n-to-earth. When we have both our feet firmly on the ground, we are realistic and we act hon estly and ope nly toward others, and our lives are like the ground below us, solid and strong.34 . If a pers on has his nose in the air, he.A. is con fide ntis easy to deal

34、withis dow n to the earthalways thinks he is more important than others35The underlined sentence“ Butthe opposite is not always true. ”most probably means that .A. the person who has his nose in the air is not truea man with his head in the clouds is often not intelligentthe opposite direction is al

35、ways wrongD. a person who has both feet on the ground may not be down-to-earth 36From the passage, we can infer the person who is is the most popularkind of person.A. down-to-earthB. standing on the groundwith his nose in the airD. with his head in the cloudsCSome people will do just about anything

36、to save money. And I am one of them.Take my familys last vacation. It was my six- year-old sons winter break from school，and we were heading home from Fort Lauderdale after a weeklong trip. The flight was overbooked，and Delta，the airline，offered us $400 per person in credits to give up our seats and

37、 leave the next day. I had meetings in New Yo，rk so I had to get back. But that didnt mean my husband and my son couldnt stay. I took my nine-month-old and took off for home.The next day，my husband and son were offered more credits to take an even laterflight. Yes，I encouragedokay，ordered them to wa

38、it it out at the airport to“earnmore Delta Dollars. Our total take：$1,600.Not bad，huh?Now some people may think Im a bad mother and not such a great wife either.But as a big-time bargain hunter，I know the value of a dollar. And these day，s a good deal is something few of us can afford to pass up.rve

39、 made a liv ing look ing for the best deals and expos in（揭露）the worst tricks.have been the consumer reporter of NBCs Today show for over a decade. I have written a couple of books including one titled Tricks of the Trade：A Consumer Survival Guide. And I really do what I believe in.I tell you this be

40、cause there is no shame in getting your moneys worth. Im also tightfisted when it es to shoes，clothes for my children，and expensive restaurants. But I wouldnt hesitate to spend on a good haircut. It keeps its shape longer，and its the first thing people notice. And I will also spend on a classic piec

41、e of furniture. Quality lasts.37Why did Delta give the authors family credits?ATheir flight had been delayed.BThey had early bookings.CThey took a later flight.DTheir flight had been cancelled.38What can we learn about the author?AShe is very strict with her childrenBShe seldom makes a promise.CShe

42、rarely misses a good deal.DShe is interested in cheap products. 39What does the author do?Shes a teacher.Shes a housewife.Shes a bus in esswoma n.Shes a media person.40. What does the author want to tell us?How to spend money wisely.How to reserve airli ne seats.C . How to expose bad tricks.D . How

43、to make a bus in ess deal.四、阅读填空（共5小题，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。选项中有两项为多余选项。Easy Ways to Keep Your Brain SharpEvery one is forgetful, but as we age, we start to feel like our brains are slowi ng down a bitand that can be a very annoying thing. _41_Read on for some tech niq ues worth tryi ng

44、._42_People who regularly made pla ns and looked forward to uping eve nts had a 50 percent reduced chanee of Alzheimers disea（早老性痴呆症），according to a recent study. _43_ Somethi ng as simple as sett ing a goal to have a weekly coffee date with a friend will do. There s evidenee that people who have a

45、purpose in life or who areworking on long or short term goals appear to do better. In other words, keep your brain look ing forward.Go for a walk.Mildly raised glucose（葡萄糖）levels can harm the area of the brain that helps you form memories and physical activity can help get blood glucose down to norm

46、al levels. In fact, exercise produces chemicals that are good for your brain._ 44_Learn something new.Take a Spanish class online, join a drawing club, or learn to play cards. A study found that mental stimulation （刺激） limits the weakening effects of aging on memory and the mi nd. But the best thi n

47、g for your brain is whe n you lear n somethi ng new and are physically active at the same time. _45_Or go dancing with your frien ds.This can be especially harmful to the aged.Focus on the future.It should be someth ing like lear ning garde ning.So take a few minu tes each day to do some readi ng.Lu

48、ckily, research shows there is a lot you can do to avoid those mome nts.But dont worry if your schedule isnt filled with life-cha nging eve nts.G In other words, whe n you take care of your body, you take care of your brain.第II卷（非选择题）五、单词拼写（共5小题，每小题1分，满分5分）46.ln this quiet way, the first两星期）of her v

49、isit soon passed away.Much new knowledge is（遥远的）from the immediate interest of theordinarypers on.Fresh air is有益的）to your health.The mountains are（反射，倒影）in the clear water, formi ng a pleasa ntpicture.To his满意）,he passed the exam in ati on.六、语法填空（共10小题，每小题1分，满分10分）My life is a lot51（easy） at high sc

50、hool because my fellow stude nts haveaccepted me. The few _52can not see the real pers on in side my body do notmake me53, and I just ignore them. All in all I have a good life. I am happyto have found many things I can do, like writing and puter programming. My ambiti on is to work for a firm that

51、develops puter software whe n I grow up. Last year I inven ted a puter football game and a big pany has decided to buy from me. I have a very busy life 54no time to sit around feeli ng sorry for myself.Without _55（pause） we jumped into the boat with the other whalers andheaded out into the bay. I lo

52、oked dow n in to the water and could see Old Tom swimmi ng by the boat,56（show） us the way. A few minutes57, therewas no Tom, so George started beating the water with his oar and there was Tom, circli ng back to the boat, lead ing us to the hunt aga in.There is no electricity or water and even no te

53、xtbooks either. I am still trying toadapt 58these conditions. _59, one thing is for sure, I have bee moreimagi native in my teachi ng. Scie nce is my most challe nging subject as my stude nts have no _60of doing experiments.七、短文改错（共1题，满分10分）61 文中共有10处语言错误，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（人）

54、，并在其下面写出该加的词。删除：把多余的词作斜线（）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。Dear Sally,Now I d like to tell you something about my par-time job this summer vacation, of which I worked like a guide in a travel agency. The work was interesting but tired. I think it was helpful to work this holiday. It was the first time that I have earned money on my own. I ve e to understand how hard my parents work to support for the family. I used to keep on ask them for money, but now I ll never waste m