高一限时训练2

2021～2021学年度第二学期第二次限时作业高一语文试卷一、语言文字运用〔18分〕1.以下各项中加点的字，每对读音都不一样的一项是哪一项〔3分〕〔▲〕A. 壅．蔽/臃．肿伛偻．/佝偻．自诩．/栩．栩如生B. 蜷．曲/缱绻．汤镬．/尺蠖．桀．纣/命运多舛．C. 蹙．眉/蹩．进簇．新/箭镞．谬赏．．/未雨绸缪．D. 愧怍．/福祚．汲．水/趿．拉奢靡．/靡．有朝矣2.以下词语中，没有错别字的一项是哪一项( 3分 ) 〔▲〕A．阻碍功夫片钟灵毓秀管中窥豹，可见一斑B．梳妆吊胃口瞠目结舌文武之道，一张一驰C．辐射入场券循章摘句风声鹤唳，草木皆兵D．蜚然直辖秘而不宣城门失火，殃及池鱼3. 在下面一段话空缺处依次填入词语，最恰当的一组是〔3分〕〔▲〕面对巍巍大山，风静静地吹来。

在此，我获得了歇息——心灵上的愉悦，精神上的回归。

洪应明在?菜根谭?里说：“帘拢高敞，看青山绿水吞吐云烟，识乾冲自在；竹树扶疏，任乳燕鸣鸠送迎时序，知物我两忘。

〞有这意思。

明月山透出一股不谙世事的和懵懂，不似其他许多地方，身心承载着太多太重的东西，它对每一个上山的人来说是平等的，轻松的。

你可默默享受它，它也不会过多留意你的身份，于是，这里就少了前人、古人、名人、大人们的阴影，唯此，才。

〔选自冯艺?冬日在明月山中?，有改动〕A．固然清纯敝帚自珍 B．果然清新敝帚自珍C．果然清纯弥足珍贵 D．固然清新弥足珍贵4．以下各句中，没有语病的一句是〔3分〕〔▲〕A．雾霾天气的形成既有气象条件的影响，也与大气污染物排放增加有关，为减少雾霾，政府还需要进一步加大大气环境治理和保护。

B．据的第一批国家级非物质文化遗产之一、剧装戏具制作技艺的传承人李荣森调研统计，剧装制作总本钱的60%来自刺绣。

C．观众看重的是春晚表达的一种仪式感，而导演组过度保密的背后，还是艺术自信心缺乏的一种表现。

D．与传统的纸质HY物相比，数字化电子HY物具有存储量大、检索便捷、便于保存、本钱低廉等优点。

C．与线速度方向始终相同D．始终保持不变（）5、将一枚硬币放在唱片上匀速转动时，硬币与唱片保持相对静止．关于硬币的受力情况。

下列说法正确的是A．硬币受静摩擦力、向心力，共两个力B．硬币受重力、支持力、静摩擦力，共三个力C．硬币受重力、支持力、滑动摩擦力，共三个力D．硬币受重力、支持力、静摩擦力、向心力，共四个力（）6、关于匀速圆周运动的向心力，下列说法正确的是A．向心力是指向圆心方向的力，受力分析时要分析B．对匀速圆周运动，向心力是一个恒力C．向心力可以是多个力的合力，也可以是其中一个力或一个力的分力D．向心力的效果是改变质点的线速度大小（）7、汽车通过拱桥最高点时A．汽车对桥的压力大于汽车所受的重力B．汽车对桥的压力等于汽车所受的重力C．汽车速度越大，汽车对桥面的压力就越大D．汽车速度越大，它对桥的压力就越小二、多项选择题（在每小题所给的答案中有多项是正确的，请将答案写在前面的括号内）（）8、右图中所示为一皮带传动装置，右轮的半径为r，a是它边缘上的一点。

左侧是一轮轴，大轮的半径为4r，小轮的半径为2r。

b点在小轮上，到小轮中心的距离为r。

c点和d点分别位于小轮和大轮的边缘上。

若在传动过程中，皮带不打滑A．a点与d点的向心加速度大小相等B．a点与b点的角速度大小相等C．a点与c点的线速度大小相等D．a点与b点的线速度大小相等（）9、做圆周运动的两个物体M和N，它们所受的向心力F与轨道半径置间的关系如图1—4所示，其中N的图线为双曲线的一个分支，则由图象可知A.物体M的线速度大小不变B.物体M的角速度不变C.物体N的角速度不变D.物体N的线速度大小不变（）10、在地球表面处取这样几个点：北极点A、赤道上一点B、AB弧的中点C、过C点的纬线上取一点D，如图1所示．A．B、C两点的向心加速度大小相等B．B、C、D三点的线速度大小相同C．B、C、D三点的角速度相同D．C、D两点的向心加速度大小相等1-7 CDDABCD8-10 AC BD CD。

高一语文晚练（二）1.下列各组加点词语中，字音无误的一项是（）A.引擎．（qíng) 水泵．（bâng）马扎．（zhá）匍．匐（pú）褒．扬（bāo）侮．辱（wū）B.发髻．（jì）瓜蔓．（wàn）茎．叶（jīng）撇．弃（piē）觇．视（chān）趿．拉（tā）C.肚脐．（qí）骨．气（gú）涎．水（xián）蕴藉．（jiâ）逡．巡（qūn）鬈．曲（quán）D.单薄．（bó）气氛．（fēn）累．赘（lãi）羁縻．（mǐ）扼腕．（wàn）繁冗．（rǒng）2.下列各组词语中，没有错别字的一项是（）A.抱歉凑和漫不经心误入歧途下功夫B.眉梢描摹毛骨耸然饥肠辘辘三棱镜C.拖沓纯粹若即若离穷形尽相脚鸭子D.炫耀拇指锱铢必较伸张正义眼红膜3.依次填入下列各句横线处的词语最恰当的一项字眼的转换有时候是由于：或者因为恐惧、厌恶，或者因为觉得说出来难听。

像上列几个例子，我相信作者在写出的时候并没有大费什么苦思苦索的。

本着这个精神，你随处留心玩索，无论是阅读还是写作，就会逐渐养成创作和欣赏都的好习惯。

A.忌讳功夫必需B.避讳功夫必须C.忌讳工夫必需D.避讳工夫必须4.下列各句中加点的成语使用恰当的一项A.最高人民法院微信负责人表示，最高人民法院微信在标题拟定上咬文嚼字．．．．，在内容上，传递法院的法治正能量。

B.他还原了自己本来的身份，变为简单俊朗的大男孩，自鸣得意．．．．，充满魅力。

C.今日，21名“民运”分子试图从香港混入内陆，被香港警方驱逐，他们便大闹机场，可谓穷形尽相．．．．，丑态百出。

D.一些党员干部脱离群众，对群众呼声置若罔闻，对群众疾苦漠不关心．．．．，对群众诉求敷衍应付，甚至有少数干部高高在上、摆“老爷派”，极大地损害了党的形象。

5.下列各句中，没有语病、表意明确的一项是（）A.我们写作要想到读者。

宜春实验中学高一年级英语必修一Unit 2限时训练（二）Ⅰ.单句填空1.What he did was wrong ， but he didn't deserve(get) a beating like that.2.Bogosian(marry)to Jo Anne Bonney since1980， with whom he has two children.3.I got this shirt when I was in Indonesia.It cost me only2dollars.It was real bargain.4. The driver has the(responsible)to make sure the children under 14 cannot sit in the front seats unless they fasten the safe belt.5.Little Tom admitted(cheat) in the exam ， promising that he wouldn't do that in the future.6. He came late again. That was the teacher got angry with him.7.The meeting(hold)in September， but nobody knows the date for sure.8. She was sad(say) goodbye to her parents and friends.9.My son is always unwilling to practise playing the piano as (regular) as he should have done.10.It is still under discussion whether the old bus station (replace) with a modern hotel or not.Ⅰ.阅读理解Sports are all about change. A team gets better. A kid practises more and swims a personal best or learns a new move on the basketball court. In 2019 ， two things happened that got me thinking about change — in sports and in life.One of them is tennis champion Andre Agassi ， who retired in 2019. Agassi was a terrific player who won 60 titles ， including eight major championships. Buthis greatest accomplishment( 成就 ) might have been how much he changedduring his career.When he was young ， Agassi was a show -off who seemed to care only about himself. He didn't train very hard ， but he won matches because of his tremendous(极大的 )talent. Eventually ， though， injuries and his bad attitude caught up with him. He fell from No.1 in the world rankings to No.141. So Agassi changed. He trained harder and became a world -class player again.More importantly ， he changed as a person. He was nicer to fans and opponents(敌手 ). He stopped thinking just about himself and started thinking about others. Through his Andre Agassi Charitable Association ， he raised more than $60 million to help disadvantaged kids around his hometown of Las Vegas ， Nevada. He even started a第1页/共4页school， the Andre Agassi College Preparatory Academy ， for at -risk kids.At the start of a new year ， lots of people promise themselves they will change. They might vow to get in good physical shape ， do better in school or be nicer to others. Changes such as those can be difficult. But they do happen. Just remember Andre Agassi: it wasn't easy ， but he changed， and changed for the better.1.According to the writer ， which of the following may be the greatest achievement for Agassi?A.He once ranked No.1 in the world rankings.B.He won 60 titles.C.He changed much during his career.D.He won 8 major championships.2.What does the underlined word “ vow ” in the 4th paragraph probably mean?A.Promise.B.Agree.C.Become.D.Prove.3.What do you know about Andre Agassi Charitable Association?A.It is intended to help at -risk kids.B.It is a charity school set up by Agassi.C.Some disadvantaged kids can get help from it.D.Agassi runs it with his prize money.4.What might be talked about in the paragraphs following this passage?A.What achievements Agassi has made after he changed for the better.B.How we can change for the better.C.Another thing happened in life that got the writer thinking about change.D.Some assessments(评论 ) about Agassi from different people.Ⅰ.完形填空I am a girl ， but I was born to be a rebel(反叛者). I like games that can be1. Some of the sports I like ， even boys won't play!Wrestling is2seen as a sport for men， but I3to see if I could do it.Every Saturday morning ， I got out of bed early to go and watch my brother 4. From morning to night，I would sit watching the5have all the fun. Since then ， wrestling has been part of my6.For three years， I7all the boys and became the best player in the team. My8memory of wrestling is when a boy walked off9 because he'd lost to a girl.My last10was at this year's Girls' State Wrestling Championships.I was so11. I was sure I would win. My heart was beating hard when the match started. I could see12but my competitor. When the final第2页/共4页whistle blew ， I had13by four points. The cameras and14 all turned to me: I was the new wrestling champion. I felt so15. But aftera few minutes of enjoying being a champion，16began to run through my knee.Because I hurt my knee， my17of being a national champion ended. Even so ， I still18to wrestle next year when I go to college. Ihave19that you can do a nything you want if you put yourinto it.1. A.interesting B.surprisingC.dangerousD.famous2. ually B.everC.rarelyD.never3. A.agreed B.pretendedC.decidedD.happened4.A.roll B.runC.fightD.practise5.A.boys B.girlsC.teammatesD.friends6.A.way B.lifeC.workD.study 7. A.beat B.hitC.knockedD.injured8.A.longest B.shortestC.bestD.worstughingD.crying10.A.chance B.matchC.tryD.sport11.A.upset B.great12.A.anything B.nothingC.everythingD.something13.C.ledD.gained14.A.hands B.playersC.lightsD.photos15.A.shy B.hopeful第3页/共4页20 9. A.shouting B.smilingC.happyD.nervous16.A.air B.bloodC.steamD.pain17.A.dream B.planC.goalD.story18.C.wantD.walk19.A.said B.heardC.learnedD.noticed20.A.time B.heartC.footD.joyⅠ.语法填空阅读下边短文，在空白处填入 1 个适合的单词或括号内单词的正确形式。

2023年1月10日高中物理作业学校:___________姓名：___________班级：___________考号：___________一：选择试题1．如图所示，用水平力F推放在光滑水平面上的物体P、Q、R，使其一起做匀加速运动，若P对Q的弹力为6 N，Q对R的弹力为4 N，Q的质量是1 kg，那么R的质量是()A．2kg B．3 kgC．4 kg D．5 kg2.2019年国际体联蹦床世界杯阿塞拜疆巴库站比赛，中国选手刘灵玲通过紧张激烈的决赛，将女子个人金牌收入囊中。

假设比赛时运动员仅在竖直方向运动，通过传感器将弹簧床面与运动员间的弹力随时间的变化规律在计算机上绘制出如图所示的曲线，当地重力加速度g 取10 m/s2，依据图象给出的信息可知，运动员的质量和运动员离开弹簧床上升的最大高度分别为()A．60 kg B．50 kgC．1.6 m D．3.2 m3.如图所示，两个质量分别为m1＝1 kg、m2＝4 kg的物体置于光滑的水平面上，中间用轻质弹簧秤连接。

两个大小分别为F1＝30 N、F2＝20 N的水平拉力分别作用在m1、m2上，则达到稳定状态后，下列说法正确的是()A．弹簧秤的示数是25 NB．弹簧秤的示数是28 NC．在突然撤去F2的瞬间，m2的加速度大小为7 m/s2D．在突然撤去F1的瞬间，m1的加速度大小为13 m/s24.金属小桶侧面有一小孔A，当桶内盛水时，水会从小孔A中流出。

如果让装满水的小桶自由下落，不计空气阻力，则在小桶自由下落过程中()A．水继续以相同的速度从小孔中喷出B．水不再从小孔喷出C．水将以更大的速度喷出D．水将以较小的速度喷出5．(多选)如图所示，一名乘客从一层乘电梯到四层，在四层短暂停留后又乘电梯到一层。

则乘客处于超重的阶段可能是()A．电梯加速上行阶段B．电梯减速上行阶段C．电梯加速下行阶段D．电梯减速下行阶段6．如图所示，粗糙水平桌面上有一个玩具小屋，小红将一工艺品“旺狗”放在玩具小屋的屋顶斜面上，发现只要给“旺狗”一个向下的初速度，它便可沿屋顶斜面匀速下滑，此过程中小屋保持静止。

高一语文第二次限时训练一、客观题1、下列词语中加点的字注音不正确的一组是（）A．廖廓．（kuî）分．外（fân）浪遏．飞舟（â）挥斥方遒．（qiú）B．沁．园春（qìn）百舸．（gě）峥．嵘（zhēng）风华正茂．（mào）C．岁月稠．（chïu）苍．茫（cāng）百侣．（lǚ）橘．子洲头（jú）D．怅．寥廓（chàng）颓圮．（qǐ）沉浮．（fú）激昂慷．慨（kāng）2、下列注音有错误的一项是（）A．荆棘．（jí）掐．死（qiā）雕．花（diāo）河畔．（bàn）B．瓦菲．（fēi）典．押（diǎn）酱．碗（jiàng）青苔．（tái）C．忸．怩（niǔ）臂．膀（bì）冰屑．（xiâ）团箕．（jī）D．火钵．（bō）凌．辱（líng）叱．骂（chì）漂泊．（bï）3、下列句中加横线的词在句中的意义与现代汉语相同的一项是（）A、行李之往来，共其乏困 B．财物无所取C．微夫人之力不及此 D．沛公居山东时4、下列词语中没有错别字的一项是（）A．隔膜万户侯漫江碧透书生义气B．携手竟自由山舞银蛇萧瑟秋风C．遏制翔实中流砥柱沧海桑田D．搏击妖娆英雄气慨浮想联翩5、下列句子属状语后置的一句是（）A此天子气也 B毋从俱死也C若属皆且为所虏 D将军战河北6、选出下列全都正确的一项（）A．谩骂散漫棉絮宽恕惋惜B．竞争毕竟维幕唯一给予C．斑斓波谰瓦菲窗扉忸怩D．朔风上溯携手隽刻惆怅7、下列句式不同于其他三句的一项是（）A楚左尹项伯者，项羽季父也 B沛公之参乘樊哙者也C若属皆且为所虏 D夺项王天下者必沛公也8、下列加点的词语解释有误的一项是（）A．看万山红遍，层林尽染．像染过一样B．指点江山，激扬．．文字激浊扬清，抨击恶浊的、褒扬善良的C．鹰击长空，鱼翔浅底．．水浅的江底D．曾记否，到中流击水．．，浪遏飞舟？游泳9、与‚夫晋，何厌之有‛句式相同的一项是：（）A．大王来何操 B．赵氏求救于齐C．是寡人之过也 D．城北徐公，齐国之美丽者也10、下列诗句朗读节奏有错误的一项是（）A、恰/同学/少年，风华/正茂B、携来/百侣/曾游，忆/往昔/峥嵘岁月/稠C、看/万山/红遍，层林/尽染D、指点/江山，激扬文字，粪土/当年/万/户侯11、下列两句话的横线上一次填入的两句应当是（）①鉴赏诗歌，正是要通过语言媒介，去_______________________________。

高一英语限时训练2I.完形填空：(共15小题；每小题2分．满分30分)阅读下面短文，掌握其大意．然后从1—15各题所给的A、B、C和D项中，选出最佳选项，并在答题卡上将该项涂黑。

The photo was in my mother’s bedroom. It showed a soldier with a gun. Below the photo was the word “Speaking”.“Who is that soldier 1 ‘Speaking’?” I asked one day.Mother laughed. “It wasn’t his name,” she said. “His name was Harold. He was my brother, my only brother. Harold was 18 when the war 2 . I was 12 then and my sisters were 10 and 9. Harold liked to play with us.”“Did you quarrel sometimes?” I asked.“We often quarreled. That’s 3 the word ‘Speaking’ comes from. When we quarreled, we said, ‘I’m not speaking to you.’ But 4 the quarrel we were all 5 again. And then we said, ‘I’m speaking now. Are you speaking to me?’”“When the war began, Harold joined the 6 . A month later he came to see us. He brought that gun to show us. Then he went miles away to the 7 . We didn’t see him for three years—three long, empty years. He didn’t often write letters. But one day in May there was a knock on the front door.”“I ran to 8 it. It was Harold! He was an 9 Harold, a thinner Harold, too. He was a man. He looked at me with his two green eyes and he 10 . That smile was just the same as before, and then he said one w ord: “11 ?”“I didn’t—I couldn’t—answer. I just fell into his arms, and he 12 his gun. He stayed with us for a month. We played all our old 13 again. Then he went back to the war.”“We 14 saw him again. One day, a letter came. Harold was dead. I wrote the word on the 15 .”( ) 1. A. asked B. written C. meant D. called( ) 2. A. happened B. ended C. began D. broke( ) 3. A. why B. where C. what D. how( ) 4. A. during B. in C. before D. after( ) 5. A. happy B. lucky C. boring D. sad( ) 6. A. army B. camp C. club D. society( ) 7. A. house B. bedroom C. door D. front( ) 8. A. watch B. open C. meet D. find( ) 9. A. excited B. older C. ugly D. inspiring( ) 10. A. cried B. jumped C. smiled D. shouted( ) 11. A. Hello B. Pardon C. Dear D. Speaking( ) 12. A. dropped B. lost C. fired D. sold( ) 13. A. jokes B. matches C. games D. toys( ) 14. A. often B. seldom C. sometimes D. never( ) 15. A. wall B. notebook C. photo D. doorII．语法填空(共10小题；每小题l. 5分．满分l5分)阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答题卷标号为16—25的相应位置上As we all know, English is the most widely used language in the world. It's important 16us to learn English well. But how?I like English as well as maths and physics. At the beginning of my English study, I spent a lot of time 17 (memorize) the grammatical rules of English. I wasn't interested in listening or speaking. Many times the marks I 18(get) in English tests were not as good as those in my maths tests, so I decided to change my way of study.Since then, I have begunto pay attention to listening. In myspare time, I often listen to English tapes and watch some English programmes on TV, I try 19 best to grasp the main idea.Reading is 20 important step in learning English well. I read text books, and other reading materials. When I am free, I often read English magazines and newspapers. 21 there are lots of new words, I often go through 22 I read without paying much attention to the new words or difficult sentences. In this way, I've improved my reading comprehension.23 glad I am! The more I read, the24 (much) I understand; the more I understand, the more I read.Recently, I have also been trying to write. Though I often make 25 (mistake), I am not discouraged. I'm determined to learn English well. I'm sure I will know it well in the future.III．阅读短文，从A. B. C. D四个选项中选择最佳答案(20分)AAfter the successful 29 th Olympic Games in Beijing, the whole world moved the sight into London. On 6 July,2005, at the 117 th International Olympic Committee(IOC) Session in Singapore, London ( Great Britain) was elected to be the host city of the 2012 Olympic and Paralympic Games.London is the capital of the UK (The United Kingdom of Great Britain and Northern Ireland). It was founded in the year of 50, which was in the times of the Roman Kingdom. It was once called Londinium. In 1801, London become the biggest city in the world.The mayor of London now is Boris Johnson. There are about 7.5 million people living in London now, and Chinese take a 1.4 % part.26.The Beijing Olympic Games was the _____ one in the Olympic history.A. twentiethB. twenty-secondC. twenty-eighthD. twenty-ninth27. London was elected to be the host city of the 2012 Olympic and Paralympic Games at the 117 th International Olympic Committee Session in _____.A. SingaponeB. ChineC. Great BritainD. the USA28. Londinium was the old name of _____A. LondonB. Northern IrelandC.Great BritainD.Roman Kingdom29. There are about _____ million Chinese people living in London now.A. 7.5B. 1.4C. 0.1D. 0.530. Which of the following is NOT right?A. The 117 th International Olympic Committee Session was held in 2005B. London is the capital of the UNC. In 1801, London become the biggest city in the world.D. The mayor of London now is Boris Johnson.BDo you like chocolate? Maybe most people do. A box of it can be a great gift. Buy one for a friend and give it as a surprise. See how happy that person gets.Say you just got a box of chocolate. Which piece do you pick first? A man has studied people’s choi ces. He says they tell something about the person. Did you choose a round piece? You are a person who likes to party. Did you choose an oval (椭圆形的)shape? You are a person who likes to make things. Picking a square shape shows something else. The person is honest and truthful. You can depend on him or her. What kind of chocolate do you pick? Maybe you like milk chocolate. This shows you have warm feeling about the past. Dark chocolate means something else. A perso who chooses it looks toward the future. What about white chocolate? Would you choose it? If so, you may find it hard to make up your mind. Some people like chocolate with nuts(果仁). These are people who like to help others.Do you believe these ideas? Can candy tell all these things? It doesn’t really matter. There is one sure thing about eaters of chocolate. They eat it because they like it.31. This passage mainly tells us ______.A. why people like chocolateB. almost everyone likes chocolateC. about different kinds of chocolateD. different choice may show different characters32. Picking a round shape of chocolate shows that a person______A. likes singing,dancingand drinkingB. likes to do something for othersC. is good at making thingsD. can be depended on33. If you enjoy eating milk chocolate, you may______A. look forward to the futureB. like to think of the pastC. enjoy parties and funD. have trouble making decisions34. From the passage we can say that a helpful man may choose chocolate_____A. in oval shapeB. in square shapeC. with nutsD. with coffee35. The last paragraph suggests that the writer_____.A. believes all the information about chocolateB. does not believe the information about candyC. is trying to get you to believe false informationD. doesn’t think it important whether you believe the ideas参考答案：1~5 DCBDA 6~10 ADBBC 11~15 DACDC16.for 17.memorizing 18.got 19.my 20.an21.Although 22.what 23.How 24.more25.mistakes26-30 DAACB 31-35 DABCD。

2014-2015年广东肇庆中学高一下学期圆周运动限时训练（二）03.15命题人：张军红 审题人：李芳（50分钟完成，满分100分）班级 学号 姓名 成绩 一.单选题.(本题共4小题，共16.每小题给出的四个选项，只有一个选项正确.) 1．下面关于匀速圆周运动的说法正确的是（ ）A ．匀速圆周运动是一种平衡状态B ．匀速圆周运动是一种匀速运动C ．匀速圆周运动是一种速度和加速度都不断改变的运动D ．匀速圆周运动是一种匀变速运动2．用材料和粗细相同、长短不同的两段绳子，各栓一个质量相同的小球在光滑水平面上做匀速圆周运动，那么（ ）A ．两个球以相同的线速度运动时，长绳易断B ．两个球以相同的角速度运动时，长绳易断C ．两个球以相同的周期运动时，短绳易断D ．无论如何，短绳易断3．小球m 用长为L 的悬线固定在O 点，在O 点正下方L/2处有一个光滑钉子C ，如图所示，今把小球拉到悬线成水平后无初速度地释放，当悬线成竖直状态且与钉子相碰时 A.小球的速度突然增大 B.小球的角速度突然减小 C.小球的向心加速度突然减小 D.悬线的拉力突然增大4．如图所示，有一质量为M 的大圆环，半径为R ，被一轻杆固定后悬挂在O 点，有两个质量为m 的小环（可视为质点），同时从大环两侧的对称位置由静止滑下。

两小环同时滑到大环底部时，速度都为v ，则此时大环对轻杆的拉力大小为（ ）A ．（2m +2M ）gB ．Mg －2mv 2/RC ．2m (g +v 2/R )+MgD ．2m (v 2/R －g )+Mg二.双选题.（本题共5小题，共30分.在每小题给出的四个选项中，只有两个选项正确.全部选对的得6分，选不全的得3分，有选错或不答的得0分.）5．关于匀速圆周运动的向心力，下列说法正确的是（ ）A ．向心力是指向圆心方向的合力，是根据力的作用效果命名的B ．向心力可以是多个力的合力，也可以是其中一个力或一个力的分力C ．对稳定的圆周运动，向心力是一个恒力D ．向心力的效果是改变质点的线速度大小6．如图所示，从A 、B 两物体做匀速圆周运动时的向心加速度随半径变化的关系图线中可以看出（ ）A 、A 物体运动时，其线速度的大小不变B 、A 物体运动时，其角速度不变C 、B 物体运动时，其角速度不变D 、B 物体运动时，其线速度随r 的增大而减小7．如图所示，固定的锥形漏斗内壁是光滑的，内壁上有两个质量相等的小球A 和B ，在各自不同的水平面做匀速圆周运动，以下说法正确的是（ ）A. V A >V BB. ωA >ωBC. a A =a BD.压力N A >N B8．铁路在弯道处的内外轨道高低是不同的，已知内外轨道平面与水平面倾角为θ(如图)，弯道处的圆弧半径为R ，若质量为m 的火车转弯时速度小于θtan Rg ，则（ ） A.内轨对内侧车轮轮缘有挤压； B.外轨对外侧车轮轮缘有挤压；C.这时铁轨对火车的支持力等于mg/cosθ；D.这时铁轨对火车的支持力小于mg/cosθ.9．如图所示，质量分别为m 1、m 2的小球A 、B 可以在光滑的水平杆上滑动，两球之间用一根水平细线相连，m 1=2m 2．当装置以角速度ω绕中心轴线匀速转动，达到平衡时，两球离轴的距离保持不变，则有( )A.两球的向心力大小相等B. 两球的线速度大小相等C.两球的向心加速度大小相等D. 212r r =B v A三、计算题（共54分）10．用长为L 的细绳栓住一个质量为m 的小球，如图所示，当小球在水平面内做匀速圆周运动时，细绳与竖直方向成θ角，求： （1）小球做匀速圆周运动的周期 （2）细绳对小球的拉力。

统计试题（一）一、选择题（本题有6个小题，每小题6分，共36分）1. 为了了解所加工的一批零件的长度，抽测了200个零件的长度，在这个问题中，200个零件的长度是 （ ）A ．总体 B. 个体 C. 总体的一个样本 D. 样本容量2. 某企业有职工150人，其中高级职称15人，中级职称45人，一般职员90人，现抽取30人进行分层抽样，则各职称人数分别为 （ ）A ．5,10,15B ．3,9,18C ．3,10,17D ．5,9,163. 有50件产品编号从1到50,现在从中抽取5件检验,用系统抽样确定所抽取的编号为（ )A ．5,10,15,20,25B ．5,15,20,35,40C ．5,11,17,23,29D ．10,20,30,40,504. 问题：①有1000个乒乓球分别装在3个箱子内，其中红色箱子内有500个，蓝色箱子内有200个，黄色箱子内有300个，现从中抽取一个容量为100的样本；②从20名学生中选出3名参加座谈会.方法：Ⅰ.随机抽样法 Ⅱ.系统抽样法 Ⅲ.分层抽样法.其中问题与方法能配对的是（ ）A.①Ⅰ，②ⅡB.①Ⅲ，②ⅠC.①Ⅱ，②ⅢD.①Ⅲ，②Ⅱ5. 如果数据x 1、x 2、…、x n 的平均值为x ，方差为S 2 ，则3x 1+5、3x 2+5、…、3x n +5 的平均值和方差分别为（ ） A.x 和S 2 B. 3x +5和9S 2 C. 3x +5和S 2 D.3x +5和9S 2+30S+256. 10名工人某天生产同一零件，生产的件数是15，17，14，10，15，17，17，16，14，12．设其平均数为a ，中位数为b ，众数为c ，则有( )．A ．a>b>cB ．b>c>aC ．c>a>bD ．c>b>a 二、填空题（本题有4个小题，每小题6分，共24分）7. 从N 个编号中抽取n 个号码入样，若采用系统抽样方法进行抽取，则分段间隔应为 .8. 甲，乙两人在相同条件下练习射击，每人打5发子弹，命中环数如下 甲6 8 9 9 8 乙 107 7 7 9则两人射击成绩的稳定程度是__________________.9. 样本12310a a a a ，，，，的平均数为12，样本128b b b ，，，的平均数为5，则样本112288910a b a b a b a a ，，，，，，，，的平均数为_________．10．已知某赛季甲、乙两名篮球运动员每场比赛得分的茎叶图（如下图所示），则甲、乙两人得分的中位数之和是_________.三、解答题（本题有2个小题，每小题20分，共40分）11．某中学高一年级有x个学生，高二年级共有900个学生，高三年级有y个学生，采用分层抽样抽一个容量为370人样本，高一年级抽取120人，高三年级抽取100人，则全校高中部共有多少学生？12. 某良种培育基地正在培育一种小麦新品种A，将其与原有的一个优良品种B进行对照试验，两种小麦各种植了25亩，所得亩产数据（单位：千克）如下：品种A: 357，359，367，368，375，388，392，399，400，405，412，414，415，421，423，423，427，430，430，434，443，445，445，451，454品种B：363，371，374，383，385，386，391，392，394，394，395，397， 397，400，401，401，403，406，407，410，412，415，416，422，430（Ⅰ）完成所附的茎叶图；（Ⅱ）用茎叶图处理现有的数据，有什么优点？（Ⅲ）通过观察茎叶图，对品种A与B的亩产量及其稳定性进行比较，写出统计结论.参考答案一、选择题1. A2.B3.D4.B5.B6.D二、填空题 7. ⎥⎦⎤⎢⎣⎡n N 8. 甲比乙稳定22228,8, 1.2, 1.6,,X X X X X X σσσσ====<乙乙乙甲甲甲而甲稳定性强 9. 988 10. 63 11．【解】由题意得100120370900100120--==y x解得 x=720，y=600, 所以高中部共有学生2200人.12. 【思路】由统计知识可求出A 、B 两种品种的小麦稳定性大小并画出茎叶图，用茎叶图处理数据，看其分布就比较明了.【解析】（1）茎叶图如图所示A B9 7 358 7 36 35 37 1 48 38 3 5 69 2 39 1 2 4 457 75 0 40 0 1 1 36 75 4 2 41 0 2 5 67 3 3 1 42 24 0 0 43 05 5 3 444 1 45（2）用茎叶图处理现有的数据不仅可以看出数据的分布状况,而且可以看出每组中的具体数据.（3）通过观察茎叶图，可以发现品种A 的平均每亩产量为411.1千克，品种B 的平均亩产量为397.8千克.由此可知,品种A 的平均亩产量比品种B 的平均亩产量高.但品种A 的亩产量不够稳定，而品种B 的亩产量比较集中D 平均产量附近.。

2021～2021学年度第二学期第二次限时作业高一数学试卷一、填空题：〔本大题一一共14题，每一小题5分，一共70分，请将答案填入答题纸填空题的相应答题线上〕1、 直线30x y -+=的倾斜角为_____弧度2、 假设直线1ax y +=与(1)23a x y -+=直线平行，那么实数a 的值是_____3、 当0>x 时，函数xx x y 422++=的最小值为______ 4、 在等比数列{}n a 中，45a =，那么17a a =______5、 不等式2111x x ->+的解集为______ 6、 假设0,0,1x y x y ≥≥+≤，那么Z=x y -的最大值为_____7、 ,A B 两点的坐标分别为(0,4),(4,6)，那么以AB 为直径的圆的HY 方程为8、 数列{}n a 的前项和为n S ，且满足21n n S a =+，那么5a =______9的值是 ___ 10、在坐标平面内，与点A 〔1，2〕的间隔 为1，且与点B 〔3，1〕间隔 为2的直线有 条11、假设1)tan(,2)(tan =-=+βαβα，那么=βα2cos 2s in ______ 12、假设点P 在平面区域⎩⎪⎨⎪⎧ 2x －y ＋2≥0，x ＋y －2≤0，2y －1≥0内，点Q 在曲线x 2＋(y ＋2)2＝1上，那么PQ 的最小值为_ __ 13、以下四个命题，其中正确的选项是 〔填序号〕．〔1〕假设210ax ax -+>在x ∈R 上恒成立，那么04a <<；〔2〕锐角三角形ABC ∆中，3A π=，那么1sin 12B <<； 〔3〕直线方程为(2)(21)340m x m y m -++++=，其中m R ∈，那么直线恒过定点()1,2--;〔4〕数列{}n a 一共有5项，其中150,2a a ==，且11,1,2,3,4i i a a i +-==，那么满足条件的不同数列有3个。