限时训练1

Ⅰ.单项填空(共 15 小题；每小题 1 分，满分 15 分)1．The enemy had no choice but ________ their arms and ________.A．lie down；give in B．lay down；give into lay down；give in D．to lie down；to give in 答案： C [have no choice but 后接带 to 的不定式，且 and 与不定式之间存在并列关系。

lay down one’s arms 是“放下武器”之意。

]2．In order to look after her sick mother，she asked for a month’s ________.A．holiday B．leave D．rest答案： C [holiday 与 vacation 指“度假”，而 leave 指因事(病)而请的假。

]3．________ alone in a dark room，the little girl was so frightened as to cry loudly.A．Left C．Being left D．To be left答案： B [此题考查非谓语动词。

由于 leave 与句子主语 the little girl 是被动关系，所以应该用过去分词作状语。

]4．—Why can’t you and Bill go to the movies tonight?—We are ________ a history test tomorrow.A．supposed to having B．supposedly to havesupposed to have D．supposedly to having答案： C [答语意为“我们明天应有历史测验”。

be supposed to do 为固定词组，意为“理应做”。

直线运动限时训练1一、单选13. (2010年海南卷)下列说法正确的是()A．若物体运动速率始终不变，则物体所受合力一定为零B．若物体的加速度均匀增加，则物体做匀加速直线运动C．若物体所受合力与其速度方向相反，则物体做匀减速直线运动D．若物体在任意的相等时间间隔内位移相等，则物体做匀速直线运动14.（2011年重庆）某人估测一竖直枯井深度，从井口静止释放一石头并开始计时，经2s听到石头落地声，由此可知井深约为（不计声音传播时间，重力加速度g取10m/s2）A.10mB. 20mC. 30mD. 40m15. （2013年广东）某航母跑道长200m.飞机在航母上滑行的最大加速度为6m/s2，起飞需要的最低速度为50m/s.那么，飞机在滑行前，需要借助弹射系统获得的最小初速度为A.5m/sB.10m/sC.15m/sD.20m/s16.（2011年天津）质点做直线运动的位移x与时间t的关系为x = 5t + t2（各物理量均采用国际单位制单位），则该质点A．第1s内的位移是5m B．前2s内的平均速度是6m/sC．任意相邻1s内的位移差都是1m D．任意1s内的速度增量都是2m/s二、双选17．在同一地点，甲、乙两个物体沿同一方向作直线运动的速度一时间图象如图所示，则A．两物体相遇的时间是2S和6SB．乙物体先在前运动2S，随后作向后运动C．两个物体相距最远的时刻是1S末和4S末D．4s-6s内乙在甲前面18．甲、乙两车某时刻由同一地点沿同一方向开始做直线运动，若以该时刻作为计时起点，得到两车的x－t图象如图所示，则下列说法正确的是A．t1时刻乙车从后面追上甲车B．t1时刻两车相距最远C．t1时刻两车的速度刚好相等D．0到t1时间内，乙车的平均速度等于甲车的平均速度19．甲、乙两物体的v －t 图象如图所示，则A.甲、乙两物体都做匀速直线运动B.甲、乙两物体若在同一直线上，就一定会相遇C.甲的速率大于乙的速率D ．甲、乙两物体若在同一直线上，就一定不会相遇20．在防恐军事演习中，某空降兵从飞机上跳下，先做自由落体运动，在t 1时刻，速度达到较大值v 1时打开降落伞，做减速运动，在t 2时刻以较小速度v 2着地，他的速度图象如图所示．下列说法正确的是A.在0～t 1内，该空降兵的平均速度v ＝v 12B.在t 1～t 2内，该空降兵的平均速度v ＝v 1＋v 22C ．在t 1～t 2内，该空降兵的平均速度v ＞v 1＋v 22D ．在t 1～t 2内，该空降兵的平均速度v ＜v 1＋v 2221．如图所示(t 轴单位为s)，有一质点，当t ＝0时从原点由静止开始出发，沿直线运动，则A ．t ＝0.5 s 时离原点最远B ．t ＝1 s 时离原点最远C ．t ＝1 s 时回到原点D ．t ＝2 s 时回到原点（2010年广东高考）（1）图13是某同学在做匀变速直线运动实验中获得的一条纸带。

2013届高三限时训练（1）（时间：45分钟）班级姓名得分一．语言基础知识1．下列词语中加点的字，每对读音都不相同的一组是（3分）A．绮．丽／倚．马可待信笺．／草菅．人命躯壳．／金蝉脱壳．B．咯．血／恪．尽职守蹊．跷／休戚．相关切削．／削．足适履C．茁．壮／相形见绌．造诣．／自怨自艾．劲．旅／疾风劲．草D．机杼．／毁家纾．难折．本／退避三舍．威吓．／杀鸡吓．猴2.下列词语中加点的字，每对读音都不相同的一组是（3分）（）A．焙．烧/．蓓．蕾恫．恐/恸．哭面颊．/汗流浃．背B．荠．菜/同侪．迄．今/收讫．踉．跄/不稂．不莠C．沙碛．/油渍．神祇．/福祉．咋．舌/乍．暖还寒D．桔．梗/诘．问桎梏．/诰．命筵．席/垂涎．已久3．下列各句中，没有语病的一句是（3分）（）A．关于小说的创作，莫言认为作家能否通过故事表达自己对社会的看法，歌颂真善美，揭露假恶丑是一件严肃的事情，并为此继续努力。

B．企业在市场上的竞争，表面上看是品牌、产品、价格、服务的竞争，但实质上是企业所有员工的品质和心态的竞争。

C．备受观众追捧的“中国好声音”不仅仅是一个优秀的选秀节目，更是中国电视历史上真正意义的首次制播分离，树立了中国电视音乐节目的新标杆。

D．10月8日零点，随着全国各地高速公路收费站收费杆的落下，使持续八天的高速公路免费通行鸣金收兵，标志着首次实施的重大节假日小客车免费通行政策首战告捷。

4. 下列各句中，没有语病的一句是（3分）（）A. 麦当劳店堂里宜人的温控环境和悦耳的轻音乐，使不少中国顾客把该场所作为闲聊、会友，甚至读书写作的好地方。

B. 打开莎士比亚戏剧集，如同打开百宝箱，使人眼花缭乱，处处迸发出智慧的火花，闪现着艺术的光芒。

C. 对于那些情节严重的犯了罪的干部，特别是占据重要职位的干部，我们必须依法给以严厉的法律制裁。

D. 苏通大桥建造的初衷是，拉近苏北、苏南的距离，进一步推动江苏省沿江开发战略的实施，具有十分重要的意义。

高三英语限时训练一总分65分第一部分：阅读理解（共两节，满分30分）第一节（共7个小题：每小题2.5分，满分17.5分）AWhat do the random, scribbled(潦草的)drawings crowding the margins(页边空白)of most high school students’ papers mean? When a student is caught doodling(乱画)in class, he will probably be criticized for daydreaming. But doodling while listening can help with remembering details, rather than implying that the mind is wandering, according to a study published in the scientific journal Applied Cognitive Psychology.In an experiment conducted b y the Medical Research Council’s Cognition and Brain Sciences Unit in Cambridge,40 subjects were asked to listen to a two-minute tape giving several names of people and places. Half of the participants were asked to shade in shapes on a piece of paper at the same time, without paying attention to neatness, while the rest were given no such instructions. After the tape had finished, all participants in the study were asked to recall the names of people and places. The doodlers recalled on average 7.5 names of people and places, compared to only 5.8 by the non-doodlers.“If someone is doing a boring task, like listening to a dull telephone conversation, they may start to daydream.” said study researcher, Professor Jackie Andrade, of the School of Psychology, U niversity of Plymouth. “Daydreaming distracts them from the task, resulting in poorer performance. A simple task, like doodling, may be enough tostop daydreaming without affecting performance on the main task.”“In psychology, tests of memory or attention will often use a second task to selectively block a particular mental process. If that process is important for the main task, then performance will be weakened. But my research suggests that in everyday life doodling may be something we do because it helps to keep us on track with a boring task, rather than being an unnecessary distraction(分心)that we should try to resist doing.” said Andrade.Dan Ware, a social study teacher, used to consider doodling a distraction from learning, but after teaching kids with all personality types he learned scribbling away during lectures helps certain students remember more information. “In my first few years of teaching, I thought, ‘Well, this kid isn’t paying attention. He’s daydreaming.’ But I had some really powerful experiences with students and came to understand in many cases that was their way of focusing, and those students were probably paying more attention than other students.” Ware said.1. What do we know about the participants involved in the experiment?A. Some were asked to note down the information neatly.B. Some were asked to memorize the names they would hear.C. Some were instructed to listen to the tape with full attention.D. Some were instructed to make random drawings on paper.2. Which of the following will both Jackie Andrade and Dan Ware agree with?A. Doodling helps some people focus.B. Doodling makes a dull task interesting.C. Students who doodle perform poorly.D. Students who doodle lack concentration.3. What is the best title of the text?A. Daydreaming Can Sharpen Study SkillsB. Doodling Can Help Memory RecallC. A Wandering Mind Improves ProductivityD. Distractions Harm Academic PerformanceBShyness is the cause of much unhappiness for a great many people. Shy people are anxious and self-conscious; that is, they are concerned about their own appearance and actions too much. Negative thoughts are constantly occurring in their minds: What kind of impression am I making? Do they like me? Do I sound stupid? Am I wearing unattractive clothes?It is obvious that such uncomfortable feelings must affect people unfavorably. A person’s self-concept is reflected in the way he or she behaves and the way a person behaves affects other people’s reactions. In general, the way people think about themselves has a deep effect on all areas of their lives.Shy people, who have low respect, are likely to be passive and easily influenced by others. They need faith that they are doing ＂the right thing＂. Shy people are very sensitive to criticism. It makes them feel inferior(自卑). They also find it difficult to be pleased by praises because they believe they are unworthy of praise. A shy person may respond to a praise with a statement like this one: ＂You’re just saying that to make me feel good. I kn ow it’s not true.＂It is clear that, while self-awareness is a healthy quality, overdoing it is harmful.Can shyness be completely got rid of, or at least reduced? Fortunately, people can overcome shyness with determination since shyness goes hand in hand with lack ofself-respect. It is important for people to accept their weaknesses as well as their strengths. Each one of us has his or her own characteristics. We are interested in our own personal ways. The better we understand ourselves, the easier it becomes to live up to our chances for a rich and successful life.4. The first paragraph is mainly about ____________. .A. the cause of shynessB. the effect of shyness on peopleC. the feelings of shy peopleD. the questions in the minds of shy people5. According to the writer, self-awareness is ____________.A. harmful to peopleB. a weak point of peopleC. the cause of unhappinessD. a good characteristic6. What is the shy people’s reaction to praise?A. They are pleased by it. B They feel it is not true.C. They are very sensitive to it.D. They feel they are worthy of it.7. We can learn from the passage that shyness ____________.A. blocks our chances for a successful lifeB. helps us to live up to our full developmentC. enables us to understand ourselves betterD. has nothing to do with lack of self-respect第二节七选五（共5小题，每小题2.5分，满分12.5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。

限时语基训练一短语结构类型一、写出六种短语结构类型。

1. 并列短语2. 偏正短语3. 动宾短语4. 后补短语5. 主谓短语6. 介宾短语二、指出下列短语的结构类型。

风俗习惯（并列短语）变化规律（偏正短语）正当此时（介宾短语）整修一新（后补短语）交头接耳（并列短语）思维敏捷（主谓短语）废寝忘食（并列短语）前程远大（主谓短语）全神贯注（主谓短语）心胸豁达（主谓短语）按照习惯（介宾短语）愚公移山（主谓短语）竞选州长（动宾短语）销售计划（偏正短语）色彩缤纷（主谓短语）交通规则（偏正短语）风和日丽（并列短语）激动不已（后补短语）禁止吸烟（动宾短语）辛勤耕耘（偏正短语）巍峨挺立（并列短语）不断发生（偏正短语）气氛热烈（主谓短语）继往开来（后补短语）三、比较并判断下列短语的结构类型。

经济发展（主谓短语）历史悠久（主谓短语）描写景物（动宾短语）市场繁荣（主谓短语）发展经济（动宾短语）悠久历史（偏正短语）景物描写（偏正短语）市场的繁荣（偏正短语）表达见解（动宾短语）我的弟弟（偏正短语）我国文学（偏正短语）小说散文（并列短语）表达的见解（偏正短语）我和弟弟（并列短语）我国的文学（偏正短语）小说和散文（并列短语）四、在划线短语后面的括号中标注其结构类型。

1. 在这呼吸不息（主谓短语）的地方，蚊子竟无从插嘴，居然睡安稳了（后补短语）。

2. 在这广漠的人海里（介宾短语）独自混了二十多年，没有一个人管束过我（动宾短语）。

3. 我的童年没有幽默，只有从荒寒的大自然感应到一点生命最初的快乐和梦幻（偏正短语）。

4. 这副劳动者的忧郁面孔上笼罩着消沉的阴影（动宾短语），滞留着愚钝和压抑（并列短语）。

5. 我感觉到有无数无形的线条（偏正短语）正穿梭在我和其他人的心灵中间（后补短语）。

6. 孩子们呵着冻得通红（后补短语），像紫芽姜一般的小手，七八个一齐来塑雪罗汉（动宾短语）。

7. 在这暗无天日的时候（偏正短语），一切都睡着了（主谓短语），都沉在梦里（后补短语）。

江苏省常州市金沙高级中学2021届高三下学期限时训练（一）英语试题第一部分：阅读理解（共两节，满分30分）第一节（共7个小题：每小题2.5分，满分17.5分）AWhat do the random, scribbled(潦草的)drawings crowding the margins(页边空白)of most high school students’ papers mean? When a student is caught doodling(乱画)in class, he will probably be criticized for daydreaming. But doodling while listening can help with remembering details, rather than implying that the mind is wandering, according to a study published in the scientific journal Applied Cognitive Psychology.In an experiment conducted by the Medical Research Council’s Cognition and Brain Sciences Unit in Cambridge,40 subjects were asked to listen to a two-minute tape giving several names of people and places. Half of the participants were asked to shade in shapes on a piece of paper at the same time, without paying attention to neatness, while the rest were given no such instructions. After the tape had finished, all participants in the study were asked to recall the names of people and places. The doodlers recalled on average 7.5 names of people and places, compared to only 5.8 by the non-doodlers.“If someone is doing a boring task, like listening to a dull telephone conversation, they may start to daydream.” said study researcher, Professor Jackie Andrade, of the School of P sychology, University of Plymouth. “Daydreaming distracts them from the task, resulting in poorer performance. A simple task, like doodling, may be enough to stop daydreaming without affecting performance on the main task.”“In psychology, tests of memory or attention will often use a second task to selectively block a particular mental process. If that process is important for the main task, then performance will be weakened. But my research suggests that in everyday life doodling may be something we do because it helps to keep us on track with a boring task, rather than being an unnecessary distraction(分心)that we should try to resist doing.” said Andrade.Dan Ware, a social study teacher, used to consider doodling a distraction from learning, butafter teaching kids with all personality types he learned scribbling away during lectures helps certain students remember more information. “In my first few years of teaching, I thought, ‘Well, this kid isn’t paying attention. He’s daydreaming.’ But I had some real ly powerful experiences with students and came to understand in many cases that was their way of focusing, and those students were probably paying more attention than other students.” Ware said.1. What do we know about the participants involved in the experiment?A. Some were asked to note down the information neatly.B. Some were asked to memorize the names they would hear.C. Some were instructed to listen to the tape with full attention.D. Some were instructed to make random drawings on paper.2. Which of the following will both Jackie Andrade and Dan Ware agree with?A. Doodling helps some people focus.B. Doodling makes a dull task interesting.C. Students who doodle perform poorly.D. Students who doodle lack concentration.3. What is the best title of the text?A. Daydreaming Can Sharpen Study SkillsB. Doodling Can Help Memory RecallC. A Wandering Mind Improves ProductivityD. Distractions Harm Academic PerformanceBShyness is the cause of much unhappiness for a great many people. Shy people are anxious and self-conscious; that is, they are concerned about their own appearance and actions too much. Negative thoughts are constantly occurring in their minds: What kind of impression am I making? Do they like me? Do I sound stupid? Am I wearing unattractive clothes?It is obvious that such uncomfortable feelings must affect people unfavorably. A person’s self-concept is reflected in the way he or she behaves and the way a person behaves affects other people’s reactions. In general, the way p eople think about themselves has a deep effect on all areas of their lives.Shy people, who have low respect, are likely to be passive and easily influenced by others. They need faith that they are doing ＂the right thing＂. Shy people are very sensitive to criticism. It makes them feel inferior(自卑). They also find it difficult to be pleased by praises because they believe they are unworthy of praise. A shy person may respond to a praise with a statement like this one: ＂You’re just saying that to make me feel good. I know it’s not true.＂It is clear that,. while self-awareness is a healthy quality, overdoing it is harmful.Can shyness be completely got rid of, or at least reduced? Fortunately, people can overcomeshyness with determination since shyness goes hand in hand with lack of self-respect. It isimportant for people to accept their weaknesses as well as their strengths. Each one of us has hisor her own characteristics. We are interested in our own personal ways. The better we understandourselves, the easier it becomes to live up to our chances for a rich and successful life.4. The first paragraph is mainly about ____________.A. the cause of shynessB. the effect of shyness on peopleC. the feelings of shy peopleD. the questions in the minds of shy people5. According to the writer, self-awareness is ____________.A. harmful to peopleB. a weak point of peopleC. the cause of unhappinessD. a good characteristic6. What is the shy people’s reaction to praise?A. They are pleased by it. B They feel it is not true.C. They are very sensitive to it.D. They feel they are worthy of it.7. We can learn from the passage that shyness ____________.A. blocks our chances for a successful lifeB. helps us to live up to our full developmentC. enables us to understand ourselves betterD. has nothing to do with lack of self-respect第二节（共5小题，每小题2.5分，满分12.5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。

2020年广东中考英语阅读理解限时训练（一）AAre you learning English and do you need help with grammar?Do you want to learn new vocabulary?Well,try to get help from the following top five free English learning centers online.Dave's ESL CafeOur center can help you learn and practice English.You can read many stories and do a lot of exercises to test yourself.You can also post questions and answers onto the Learners'Corner.Classroom by Voice of AmericaYou can watch videos and listen to news stories to improve your listening and vocabulary.You can also listen to English words and their meanings.About EnglishYou can take free English courses in our center,and you'll get regular(定期的)e­mails that will help you learn English.Newbury House Dictionary of American English Do you need to find the definition(定义)of a word?Use this online dictionary to find simple and clear definitions,as well as example sentences and idioms(习语)．You can also find different cultural facts.Personal English Portal(门户网站)on YouTube We offer you series(系列)of videos to develop your listening skills.You can also do a search on YouTube to find other videos.This is a good way to practice English and have fun.()1.Linda is interested in Dave's ESL Cafe.What can she do in the center?A．Watch videos.B．Listen to news stories.C．Find the meanings of words.D．Post questions and answers.()2.From Newbury House Dictionary of American English，what can you find?A．Example sentences and idioms.B．English songs.C．English grammar exercises.D．Many videos.()3.About English often sends e­mails to its visitors to help them ________.A．get relaxed B．have funC．become famous D．learn English()4.If you want to develop your listening skills and have fun，you can go to________.A．Newbury House Dictionary of American EnglishB．YouTubeC．Dave's ESL CafeD．the Classroom by V oice of America()5.Where may we read the above information?A.In the science fiction.B．In a newspaper.C.In a story book.D．In a science report.BNo matter who you are and where you live，the most important thing is what kind of person you are.There are many good qualities(品质)that can benefit you a lot in your life.Among them，the following qualities are the most helpful ones.Have a positive attitude(态度).Life is not always a bed of roses. When you face difficulties，don't lose heart.Do you know what can help you overcome difficulties?It's your attitude.Cheer up！Life is like a mirror.When you smile in front of it，it will also smile at you.Keep learning.Maybe you are used to your present life.Every day you have so much work to do that you can't find any time to learn. However，the world around you is changing all the time.Never be satisfied with yourself，or you will fall behind others.Keeping learning can help you get success in the future.Be creative.In the modern world，the students who have creative thinking are needed most.Being creative means coming up with new ideas and having creative imagination.Those who are creative have more choices in their life.Be honest and keep your promise.Honesty is the best policy(原则). Nobody likes a person who tells lies.The one who keeps his words is popular everywhere.As long as you have these qualities mentioned above，you will be excellent and make a difference to the world.Albert Einstein once said，“Try not to become a man of success but rather try to become a man of value.”()6.From the passage，we know that_____can help you overcome difficulties.A.rosesB.attitudeC.mirrorsD.learning ()7.The underlined word“benefit”probably means____in Chinese in this passage.A.影响B.补贴C.有益D.救济()8.In the writer's opinion，there are_____qualities that can benefit you most in your life.A.threeB.fourC.fiveD.six ()9.Which of the following is NOT true according to the passage？A.Since there is too much work to do，you needn't find time tolearn.B.If you think creatively，you will have more chances to choosein your life.C.When you keep your words，you usually promise to do whatyou have said.D.Albert Einstein thought we should become a man of value.()10.Which one might be the best title of this passage？A.Keeping Your PromiseB.Being a Man of SuccessC.Trying to Think CreativelyD.The Most Helpful Qualities of a ManAMany students find it difficult to learn English.Some of them even want to give up.They wonder how they can learn it well.Here are four English classes in Yucai Training Center.Have a look,maybe they can help you to improve it.Class 1:For speaking Time:7：30p ．m.—9：30p ．m.everyTuesday Teacher:John Smith (the USA)Price:￥150for a monthIntroduction:In this class,you will learn how to talk with others in English and how to sing English songs.Class 2:For reading Time:8：00p ．m.—10：00p ．m.on Mondays Teacher:Jeff Green (the UK)Price:￥180for 6weeks Introduction:We'll tell you some useful reading strategies and skills.Some for daily reading and some for exam reading.Class 3:For listening Time:7：00p ．m.—8：30p ．m.onWednesdays Teacher:Lin Tao (CHN)Price:￥100for 3weeksIntroduction:This class will give you some helpful advice to practice listening.Class 4:For writing Time:7：00p ．m.—9：00p ．m.every Thursday Teacher:Rose (Australia)Price:￥120for 4weeks Introduction:Rose is an experienced teacher.She has her special ways for you to improve your writing.She is also here to be your pen pal.For more information,you can read tomorrow's newspaper or contact (联系)Mr.Zheng at 0769­6653221or e­mail him at yucai @ .2020年广东中考英语阅读理解限时训练（二）()1.There is(are)________class(es)for you to improve your English in Yucai Training Center.A．one B．twoC．three D．four()2.If you want to join all the classes in this training center,you should pay________for them.A．￥150B．￥180C．￥220D．￥550()3.________will teach Mr.Chen to improve his speaking.A．John Smith B．Jeff GreenC．Lin Tao D．Rose()4.You can read this advertisement________.A．in a storybook B．in a newspaperC．in a magazine D．on the Internet()5.Which is the correct order for the class in Yucai Training Center according to the time you can join in?①Class1:For speaking②Class2:For reading③Class3:For listening④Class4:For writingA．①②③④B．②①③④C．②①④③D．③④②①BPinyin,a system that uses the Latin letters,tells us how to pronounce Chinese characters.What you learned in your first Chinese class in primary school was probably pinyin.The year2018marks pinyin's sixtieth birthday.In1958,Chinese linguist(语言学家)Zhou Youguang and his team designed pinyin.Before that,Chinese people used many other methods to denote(标注)the pronunciation of Chinese characters.In ancient China, people denoted Chinese characters using other Chinese characters that had the same pronunciation.Some of the symbols are Chinese character strokes(笔画)．For example,a vertical stroke(一竖)pronounced as“i”in pinyin.Some people in Taiwan still use this method.However,these methods are not as simple as pinyin.Because of pinyin,many illiterate(不识字的)people have learned how to read.We use pinyin to type Chinese characters into computers and phones.Pinyin has been useful in other ways,too.It helps to promote the use of Standard Chinese,or Mandarin, so people who speak different dialects(方言)can still understand each other.Pinyin is not only popular in China.Many people around the world start to learn Chinese by learning pinyin.You might say“nihao”instead of “hello”to a foreign friend.The Oxford English Dictionary(《牛津英语词典》)includes more than100Chinese words in pinyin,such as zhongguomeng for“Chinese dream”，and wanggou for“online shopping”．Pinyin is not only a language tool,but also a cultural bridge that connects China to the world,Guangming Daily noted.Pinyin is still young.But it has been and will still be a useful tool in the future.()6.The underlined word“promote”in the second paragraph may mean“________”in the passage.A．解释B．改善C．表达D．介绍()7.Paragraph2mainly tells us about________.A．the history of pinyin B．the designers of pinyinC．the problems of pinyin D．the future of pinyin()8.The writer talks about the Oxford English Dictionary to tell us ________.A．pinyin is popular only in ChinaB．pinyin is popular all over the worldC．pinyin will not be used in the futureD．English will be replaced(代替)by pinyin()9.We can learn from the passage________.A．pinyin has been used since ancient ChinaB．people in Taiwan prefer to use pinyinC．pinyin is useful in many waysD．we will not use pinyin in the future()10.We can infer from the passage that the writer feels________ about the future of pinyin.A．doubtful B．unsureC．hopeful D．sad2020年广东中考英语阅读理解限时训练（三）AHello,lovely boys and girls.I would like to introduce our English language holidays for you.As English is one of the most widely spoken languages in the world，millions of people look forward to studying English abroad(在国外)during holidays.English language holidays are taken in English­speaking countries like England，the USA，Australia and so on.There，you study in a language school with students from many different countries.You live with local(本地的)people，and often stay with a host family.The English language holiday has become a very popular way of learning English because it has many advantages.●Constant Experience(持续的体验)Because you are in an English­speaking country，from the time you wake up and have breakfast with your host family until late evening，you have no opportunity to escape the English language.●Mixed(混合的)ClassesOn a language holiday，students come from all over the world.It is possible that nobody in your class will speak your language，so you will just have to speak English.●Free From PressureOn a language holiday，you may forget the everyday pressure of school.You feel more relaxed and you can learn easily.●Cultural UnderstandingLearning a language is not only about learning words.Different countries have different cultures.People think and behave(表现)differently.By visiting and living in a foreign country，you learn to understand the culture and the people，and so understand the language better.If you want to know more about it,don't forget to attend our introduction meeting on time.It will be held at eight tomorrow morning in our school hall.You won't realize its advantages until you experience it by yourself.()1.The followings are all English­speaking countries EXCEPT ______according to the passage.A.EnglandB.the USAC.RussiaD.Australia()2.While you are having an English language holiday，you cannot ______.A.just do what you likeB.study in a language schoolC.stay with a host familyD.live with local people()3.What does the underlined word“escape”mean in Chinese?A.教育B.逃避C.表达D.进去()4.The number of advantages of English language holidays is ______.A.oneB.twoC.threeD.four()5.What's the best title of this passage?A.English language holidays.B.English language holidays are popular.C.The advantages of English language holidays.D.The disadvantages of English language holidays.BDo you know what smart phones can do for us?We can make phone calls，take photos，call a Didi Taxi，send short messages or e­mails，check e­mails，surf the Internet and watch videos almost anywhere.Especially，smartphone shopping has become more and more popular in our life because people can buy almost everything they need there.You are wondering how to shop on smartphones?Let me show you.If you live in the central part of the city,and you need to buy some fresh grapes from the east of the city,you can use your smartphone.To start with，all you need to do is download a shopping app(应用程序)and find a suitable store you like.Shopping on the smartphone has a lot of advantages，of which the most important is perhaps its convenience.People don't have to waste a lot of energy and time to go from one shop to another to choose things they like.This is especially good for the old，the sick and the busy people who cannot go to the shops by themselves.However，shopping on the smartphone also has its disadvantages. The first disadvantage is that people can't see the goods or try them on by themselves.Sometimes，the real goods may not be the same as what they have seen on the smartphone.The second disadvantage is that some shops on the Internet are not registered(登记的).They will never deliver(递送)anything to you after they get the money from you.Once you are cheated，you will find that you have nowhere to go to complain(投诉).()6.Smartphone shopping has become more and more popular in our life because______.A.we can take photos and send short messagesB.we can buy almost everything we needC.we can check e­mails and surf the InternetD.we can make phone calls and call a Didi Taxi()7.If you want to shop on smartphones，you should______at first.A.go to the storeB.find a suitable storeC.send e­mails to the shopD.download a shopping app()8.What does the underlined word“convenience”mean in Chinese?A.麻烦B.方便C.舒适D.交流()9.The number of disadvantages of shopping on smartphones is ______.A.oneB.twoC.threeD.four()10.What's the best title of this passage?A.Smartphone shopping.B.The usages of smartphone shopping.C.The advantages of smartphone shopping.D.The disadvantages of smartphone shopping.AHow winter weather influences the subway serviceWhen temperatures drop,and ice and snow fall on the tracks,know more service changes by:☆listening to your local traffic broadcasts☆visiting our website ☆signing up for email or text message warnings on our website☆following us on Twitter(NYCTSubwayScoop)☆calling our travel information line at 718-330-1234Our goal is to keep as many trains in service as possible and to keep you informed.Depending on how bad the weather is,here’s what you can expect:Service on these lines may run local on different parts of their routes:A,E,D,F,N,Q,2,3,4,5Service will change on these lines:G —Service between Court Square and 71st Street will stop for some time.7—Reduced service 11p.m.—1a.m.After 1a.m.normal late night service startsagain.S —*42nd Street train runs all night*Dyre Road trains go farther to 149th Street*Rockaway Park train goes farther to Euclid RoadExpect service on these weekday lines to end earlier than normal:B(take D or Q instead),V(take F instead),W(take N instead)Please allow for more travel time and listen for broadcasts.Thank you.2020年广东中考英语阅读理解限时训练（四）()11.People can know about subway service changes in winter through_____ ways.A.threeB.fouC.fiveD.six()12.The subway website will_____.A.send emails to some passengersB.keep all the underground trains in serviceC.follow the passengers around in the stationD.call the travel information line to know about the changes()13.What service changes there will be depends on_____.A.the weatherB.the seasonC.passengersD.the temperature()14.The service of_____lines will change if necessary.A.tenB.fourteenC.sixteenD.eighteen()15.When Line V ends earlier,passengers can take_____.A.Line7B.Line QC.Line5D.Line FBWould you like to live in a city where buildings turn the lights off for you,and self-driving cars will find the nearest parking space themselves?Although it might sound a little far from you,living in a“smart”city like this could happen sooner than you think.Great changes have taken place in towns that we have lived in for centuries, while completely new cities are being built.One such place is the city of Songdo. Every home there will have a“tele-presence system(远程遥控系统)”allowing users to control the heating and locks,take part in video meetings,and receiveeducation,health care and government services.Around the city,escalators(自动扶梯)will only move when someone is on them,and offices and schools will all be connected to the system.The great mind behind Songdo is from the company Cisco.In fact,technology companies around the world such as IBM,Siemens and Microsoft are already in the business.“About75%of the world’s population will live in cities by2050,so cities will need to be more modern to deal with the coming problems.Making cities smarter is one way out,and I think this will in turn make cities greener,”said Dan Hill, head of a research company.()16.According to the text,living in a“smart”city_____.A.is not a green wayB.will be far from youC.will soon become trueD.is completely impossible()17.The underlined phrase“in turn”means_____in Chinese.A.反过来B.轮流C.依次地D.翻转()18._____offers the great mind to build Songdo.A.CiscoB.IBMC.SiemensD.Microsoft()19.Dan Hill thinks that making cities smarter is one way to_____.A.drive people out of citiesB.control the world’s populationC.develop his own companyD.solve the cities’coming problems()20.Which of the following might be the best title for the text?A.Future EducationB.Smart Citiesernment ServicesD.Famous Companies【参考答案】训练一1-5 D A D B B 6-10 B C B A D 训练二1～5 D D A B B 6～10 D A B C C　训练三1~5C A B D C6~10B D B B A 训练四1-5 C A A C D 6-10 C A A D B。

1生物限时训练（1）一、选择题：1. 由地震形成的海洋中有大小相似的甲、乙两个小岛，某时间段内小岛上鸟类种类和数量随时间变化的情况如图所示，下列有关叙述中，错误的是：A ．两岛上的鸟类存在地理隔离，不同种的鸟类之间存在着生殖隔离B ．甲岛较乙岛鸟种类增加更多，可能是甲岛的环境变化更大C ．两岛的鸟类各形成一个种群基因库，且两个基因库间的差异越来越大D ．两岛上鸟类的种类虽然不同，但最终两岛上鸟类的数量趋于相同2. BrdU 能替代T 与A 配对，而渗入新合成的DNA 链中。

当用姬姆萨染料染色时，不含BrdU 的链为深蓝色，含BrdU 的链为浅蓝色。

现将植物根尖分生组织放在含有BrdU 的培养液中进行培养，如图a ～c 依次表示加入BrdU 后连续3次细胞分裂中期，来自1条染色体的各染色体的显色情况（阴影表示深蓝色，非阴影为浅蓝色）。

有关说法正确的是：A ．1个DNA 复制3次所产生的DNA 分别位于2条染色体上B ．b 图每条染色体均有1个DNA 的2条脱氧核苷酸链都含BrdUC ．1个染色体形成2条染色单体时，DNA 还没有复制D ．c 图中有2条染色单体的所有脱氧核苷酸链都不含BrdU3. 在小鼠中，有一种叫灰砂色（T ）的基因，位于X 染色体上。

灰砂色“XO 患病”雌鼠与正常灰色（t ）雄鼠交配，预期后代基因型为（胚胎的存活至少要有一条X 染色体）：A ．X T Y 、X T X t 、X tB ．X t Y 、X T X t 、X tC ．X T Y 、Y 、X T X t 、X tD ．X T Y 、Y 、X T X t 4. 在某岛屿上相互隔绝的甲、乙两个水潭中，都生活着小型淡水鱼――虹鳉。

研究发现，甲中的虹鳉（天敌是狗鱼，以大而成熟的虹鳉为食）比乙中的虹鳉（天敌是花鳉，以幼小的虹鳉为食）常常早熟，即在体重较低时就能繁殖后代。

下列观点不正确的是：A ．两个虹鳉种群中都有成熟早或晚的变异类型，这是进化的前提条件B ．甲中的早熟型个体有更多的机会繁殖后代，因而种群中早熟基因的基因频率增加C ．因为甲、乙中的两个虹鳉种群存在地理隔离，所以它们属于不同的物种D ．若将甲中虹鳉和乙中花鳉转移到一个新水潭中共同饲养，多年后虹鳉成熟个体平均体重将会增加5.下面是四种不同质粒的示意图，其中ori为复制必需的序列，amp为氨苄青霉素抗性基因，tet为四环素抗性基因，箭头表示同一种限制性内切酶的酶切位点。

高二物理（创）周考练一、选择题（1、4、10、11、12多选，其他单选）1．下列说法中正确的是()．A．每种金属都有确定的电阻率，电阻率不随温度变化B．导线越细越长，其电阻率也越大C．一般金属的电阻率，都随温度升高而增大D．测电阻率时，为了提高精度，通过导线的电流要足够大，而且要等到稳定一段时间后才可读数2.电位器是变阻器的一种．如图所示，如果把电位器与灯泡串联起来，利用它改变灯的亮度，下列说法正确的是()．A．连接A、B使滑动触头顺时针转动，灯泡变暗B．连接A、C使滑动触头逆时针转动，灯泡变亮C．连接A、C使滑动触头顺时针转动，灯泡变暗D．连接B、C使滑动触头顺时针转动，灯泡变亮3．如图所示是电阻R1和R2的伏安特性曲线，并且把第一象限分为Ⅰ、Ⅱ、Ⅲ三个区域，现在把R1和R2并联在电路中，消耗的电功率分别为P1和P2，并联总电阻设为R.下列关于P1和P2的大小关系及R的伏安特性曲线应该在的区域正确的是()．A．特性曲线在Ⅰ区，P1<P2B．特性曲线在Ⅲ区，P1>P2C．特性曲线在Ⅰ区，P1>P2D．特性曲线在Ⅲ区，P1<P24．某导体中的电流随其两端电压的变化如图7-1-9所示，则下列说法中正确的是()．A．加5 V电压时，导体的电阻约是5 ΩB．加12 V电压时，导体的电阻约是1.4 ΩC．由图可知，随着电压的增大，导体的电阻不断减小D．由图可知，随着电压的减小，导体的电阻不断减小5．两个电阻，R1＝8 Ω，R2＝2 Ω，并联在电路中，欲使这两个电阻消耗的电功率相等，可行的办法是()．A．用一个阻值为2 Ω的电阻与R2串联B．用一个阻值为1 Ω的电阻与R2串联C．用一个阻值为6 Ω的电阻与R1串联D．用一个阻值为2 Ω的电阻与R1串联6.甲、乙两根保险丝均为同种材料制成，直径分别是d1＝0.5 mm和d2＝1 mm，熔断电流分别为2.0 A和6.0 A，把以上两根保险丝各取等长一段并联后再接入电路中，允许通过的最大电流是().A.6.0 A B．7.5 AC.10.0 A D．8.0 A7．如图所示，电源电动势E＝8 V，内电阻为r＝0.5 Ω，“3 V，3 W”的灯泡L与电动机M串联接在电源上，灯泡刚好正常发光，电动机刚好正常工作，电动机的线圈电阻R0＝1.5 Ω.下列说法中正确的是()．A．通过电动机的电流为1.6 AB．电源的输出功率是8 WC．电动机消耗的电功率为3 WD．电动机的输出功率为3 W8．两根材料相同的均匀导线x和y串联在电路中，两导线沿长度方向的电势变化情况分别如图中的ab段和bc段图线所示，则导线x和y的横截面积之比为()．A．2∶1 B．1∶2C．6∶1 D．1∶69．在如图所示的电路中，E为电源，其内阻为r，L为小灯泡(其灯丝电阻可视为不变)，R1、R2为定值电阻，R3为光敏电阻，其阻值大小随所受照射光强度的增大而减小，V为理想电压表．若将照射R3的光的强度减弱，则()．A．电压表的示数变大B．小灯泡消耗的功率变小C．通过R2的电流变小D．电源内阻消耗的电压变大10．如图所示，电源电动势为E，内阻为r，不计电压表和电流表内阻对电路的影响，当电键闭合后，两小灯泡均能发光．在将滑动变阻器的触片逐渐向右滑动的过程中，下列说法正确的是()．A．小灯泡L1、L2均变暗B．小灯泡L1变亮，小灯泡L2变暗C．电流表A的读数变小，电压表V的读数变大D．电流表A的读数变大，电压表V的读数变小11．如图所示，电源电动势为E，内电阻为r，两电表均可看做是理想电表．闭合开关，使滑动变阻器的滑片由右端向左滑动，在此过程中()．A．小灯泡L1、L2均变暗B．小灯泡L1变暗，L2变亮C．电流表A的读数变小，电压表V的读数变大D．电流表A的读数变大，电压表V的读数变小12、如图所示电路中，电源内阻不能忽略，两个电压表均为理想电表．当滑动变阻器R 2的滑动触头P 滑动时，关于两个电压表V 1与V 2的示数，下列判断正确的是( )．A ．P 向a 滑动V 1示数增大、V 2的示数减小B ．P 向b 滑动V 1示数增大、V 2的示数减小C ．P 向a 滑动，V 1示数改变量的绝对值小于V 2示数改变时的绝对值D ．P 向b 滑动，V 1示数改变量的绝对值大于V 2示数改变量的绝对值二、解答题13．两个分别用长l = 5cm 的绝缘细线悬挂于同一点的相同金属小球（可视为点电荷），带有等量同种电荷。

小试牛刀
1. 为了解1200名学生对学校某项教改试验的意见，打算从 中抽取一个容量为30的样本，考虑采用系统抽样，则分 段间隔（抽样距）为（A） A. 40 B.30 C.20 D.12 3. 随机抽取某中学甲、乙两班各10 名同学，测量他们的身高 ，获得身 高茎叶图如右图所示。若乙班有60 名同学，通过茎叶图估计乙班有多 少同学身高超过175？甲班样本的 中位数，众数各是多少？
ห้องสมุดไป่ตู้
答案：24；169；168, 179
3. 右图是一容量为100的样本频率 分布直方图，则由图形中的数据， 样本落在[15, 20)内的频数为（B ） A. 20 B. 30 C.40 D.50
4. 某篮球队教练要从甲乙两名运动员中 x甲 x乙 8 挑选一名运动员，甲乙两人进行10轮投 3 2 2 s甲 1 s乙 ； 篮比赛，甲每轮投中的次数分别为9，7， ； 5 8，7，8，10，7，9，8，7，乙每轮投 中的次数分别为7，8，9，8，7，8，9， 8，9，7.分别计算两个样本的平均数 和方差s2, 并估计哪位运动员的水平高。

永丰中学2023—2024学年高一上学期限时训练（一）数学试题命题人：陈保进 时间：45分钟 总分：80分一､单选题（本大题共6小题，每小题5分，共30分.每小题只有一个选项符合题目要求） A B =（ }2≥x x 2．命题“1x ∃≥，使21x >.”的否定形式是（ ）A ．“1x ∃<，使21x >”B ．“1x ∃<，使21x ≤”C ．“1x ∀≥，使21x >”D ．“1x ∀≥，使21x ≤”3．已知a 为实数，{|14}A x x =≤<，{|}B x x a =≥，若A B ⊆，则a 的取值范围为（ ） A ．a <1 B ．1a ≤ C ．1a > D ．1a ≥4．满足{}1A ⊆⫋{}1,2,3,4的集合A 的个数为（ ）A ．(]1,8B ．[)(]4,11,8-⋃C ．(]1,2D ．[)(]1,11,2-二､多选题（共2小题，每小题5分，共10分.在每小题给出的选项中，有多项符合题目要求，全部选对的得5分，部分选对得2分，有选错的得0分）2y x 8．对于给定实数a ，关于x 的不等式(2)(1)0ax x +-≤的解集可能是（ ）三､填空题（共3小题，每小题5分，共15分，请将答案填在题中横线上）四､解答题（本大题共2小题，共25分.解答应写出文字说明，证明过程或演算步骤）A B B =，求13．（13分）已知关于x 的函数()21y x a x a =-++.(1)求不等式0y <的解集；(2)若2y x ≥-对任意的1x >都成立，求实数a 的取值范围.参考答案9．{|5x x ≤-或1}x > 10. ② 11.02a <≤四、解答题12.（1）},52{≤≤-=x x A },52{>-<=x x x A C R 或当3m =时，则{}27B xx =≤≤∣， 所以}22{)(≥-<=⋃x x x B A C R 或.（2）A B B =，∴B A ⊆，当B =∅时，则有121m m ->+，即2m <-，满足题意； 当B ≠∅时，则有121m m -≤+，即2m ≥-，由题意可得12215m m -≥-⎧⎨+≤⎩，解得：12m -≤≤. 综上所述，m 的范围为2m <-或12m -≤≤.13.【详解】（1）由()0f x <得()()10x a x --<，令()()10x a x --=，得1x a =，21x =，当1a >时，原不等式的解集为()1a ,；当1a =时，原不等式的解集为∅；当a <1时，原不等式的解集为(),1a ；（2）由()20f x x +≥即20x ax x a -++≥在()1,∞+上恒成立，得21x x a x +≤-， 令1(0)t x t =->，则1x t =+，则()222113223331t t x x t t t x t t t ++++++===++≥=-，当且仅当t 1x =时等号成立，∴3a ≤故实数a 的取值范围是(,3⎤-∞⎦.。

高三英语限时训练一、阅读理解A7-Day Tour from London to EdinburghA London guide will show you the city’s famous landmarks like Buckingham Palace, Downing Street and Westminster Abbey. Then, in Edinburgh, you’ll tour the castle and see Scotland’s Crown Jewels. From the historical sights to the beautiful scenery, this guided tour of England and Scotland is a great way to experience everything Britain has to offer.Starting at: $849 per person9-Day Tour from Dublin to LondonYour guided tour of Ireland and Britain begins in the capital cityof Dublin. Enjoy seeing the “Fair City”, including the statue-lined O’Connell Street, Trinity College, and St. Patrick’s Cathedral. Your local guide will show you the famous sights, including the Houses of Parliament, Big Ben, Westminster Abbey and Buckingham Palace. This guided tour of Ireland and Britain is a welcome escape with fewer crowds and lower costs than high-season tours.Starting at: $1069 per person7-Day Tour from London to ParisYour guided vacation in London begins with a welcome dinner and a cruise on the Thames River to admire the Tower Bridge and the Houses of Parliament. You’ll spend three nights in London to see the sites ofthis historic city—from Big Ben to Buckingham Palace, and also St. Paul’s Cathedral. Then you’ll enjoy a 3-night stay in Paris. This includes sightseeing at the Arc de Triomphe, Concorde Square, Champs-Elysees, and a Seine cruise. This guided tour of London and Paris is certain to be enjoyable with fewer crowds in the off-season!Starting at: $1149 per person1. How much would a couple pay for the 7-day tour from London to Edinburgh?A．$849. B．$1149. C．$1698. D．$2138.2. Which place can you visit if you take the 9-day tour from Dublin to London?A．Downing Street. B．Trinity College. C．The Thames River. D．Concorde Square.3. What do the three tours have in common?A．They are all guided tours for visitors.B．People will spend the same amount of time.C．They all begin in the capital city of London.D．People can enjoy the same number of sights.BRace walking shares many fitness benefits with running, research shows, while most likely contributing to fewer injuries. It does, however, have its own problem.Race walkers are conditioned athletes. The longest track and field event at the Summer Olympics is the 50-kilometer race walk, which is about five miles longer than the marathon. But the sport’s rulesrequire that a race walker’s knees stay straight through most of theleg swing and one foot remain in contact (接触) with the ground at all times. It’s this strange form that makes race walking such anattractive activity, however, says Jaclyn Norberg, an assistantprofessor of exercise science at Salem State University in Salem, Mass.Like running, race walking is physically demanding, she says, According to most calculations, race walkers moving at a pace of six miles per hour would burn about 800 calories(卡路里) per hour, which is approximately twice as many as they would burn walking, although fewer than running, which would probably burn about 1,000 or more calories per hour.However, race walking does not pound the body as much as running does, Dr. Norberg says. According to her research, runners hit the ground with as much as four times their body weight per step, while race walkers, who do not leave the ground, create only about 1.4 times their body weight with each step.As a result, she says, some of the injuries associated with running, such as runner’s knee, are uncommon amo ng race walkers. But thesport’s strange form does place considerable stress on the ankles and hips, so people with a history of such injuries might want to becautious in adopting the sport. In fact, anyone wishing to try race walking should probably first consult a coach or experienced racer to learn proper technique, she says. It takes some practice.4. Why are race walkers conditioned athletes?A．They must run long distances.B．They are qualified for the marathon.C．They have to follow special rules.D．They are good at swinging their legs.5. What advantage does race walking have over running?A．It’s more popular at the Olympics.B．It’s less challenging physically.C．It’s more effective in body building.D．It’s less likely to cause knee injuries.6. What is Dr. Norberg’s suggestion for someone trying race walking? A．Getting experts’ opinions.B．Having a medical checkup.C．Hiring an experienced coach.D．Doing regular exercises.7. Which word best describes the author’s attitude to race walking? A．Skeptical. B．Objective.C．Tolerant. D．Conservative.CAn unconventional method for growing rice has been found to increase yields(产量) by 20 to 50 percent. Reports from China, India, Southeast Asia and Africa suggest that average yield increases of 20 to 50 percent are regularly being achieved by farmers adopting the "system of rice intensification(集约化)"(SRI)，which needs one-tenth as many seeds and aims to stimulate the root system of plants rather than trying to increase yields in the conventional way by using improved seeds and fertilizers.The idea of using less to gain more is seen as an important innovation(革新) for adapting farming to climate change and a way to increase yields at a time when human populations are growing fast but traditional plant breeding and genetically modified techniques have failed to increase yields more than a few percentage points, says Norman Uphoff, professor of international agriculture at Cornell.The new way to grow rice needs only half as much water, and is proving most popular in water-stressed countries, says Tavseef Mairaj Shah, a Ph.D．researcher. "Rice growing in Kashmir largely depends on irrigation systems that draw water from the river Jhelum. But climate change is leading to drier winters, untimely rains, and warmer summers."“SRI is a great technique, not just from the water-savingperspective but because it offers better yields and soil conditions. Different studies, both at the experimental level and farmer-participative level, have shown that SRl improves yields with less water.” Shah adds.Some academic, the global seed industry and the international community once rejected reports of “fantastic” yields, accusingfarmers of falsifying(篡改）records and researchers of carelessness and "non-science". But more than 600 articles, checked by SRI Internationalat Cornell University, have shown benefits.Uphoff says, “Attitudes are changing.The original hostility(敌意)has gone." However, the early opposition has resulted in comparativelylittle scientific research being conducted into SRI and a slow understanding by funders.8. How does SRI increase the yields of rice?A．By sowing more seeds B．By using improved seeds.C．By improving its root system. D．By adopting special fertilizers. 9. Compared with the conventional method for growing rice, SRI.A．needs less water B．increases labor costsC．requires better soil conditions D．depends on genetically modified techniques10. What was the global seed industry's initial attitude toward reportson SRI?A．Curious B．Skeptical. C．Approving D．Uninterested. 11. Which of the following can be the best title of the passage?A．How to Increase YieldsB．People's Attitudes Towards SRIC．An Innovative Means of Growing RiceD．The Disadvantages of Conventional Plant Breeding二、完形填空A Florida man likes to shop at garage sales for old plaques(纪念匾)so he can reuse the wooden backs. Recently, he was looking through a 12 he bought years ago when one 13 a small ball caught hiseye.The man took a moment to 14 what was written on the plaque and quickly realized there was a 15 stone inside the ball-a piece ofmoon rock brought back on the Apollo 17 mission in 1972. The plaque and rock had been a 16 to the state of Louisiana by then-President Richard Nixon but 17 ended up in a garage sale for the man to find years later.“I can’t even tell you how long I 18 i t for. I’m not evensure how much I 19 for it. The wood in the plaques is such nicewood and that is what I 20 them for," the man said. The man 21 t he Louisiana governor’s office, which 22 him to the LouisianaState Museum. The man hand-delivered his 23 to the Louisiana State Museum. He didn’t want to take a chance that something might happen toit during 24 .The museum’s director is 25 for hisgenerosity and 26 for reuniting the state with this priceless object. “It is an extraordinary piece of Louisiana history,” he said. “We’re 27 to take possession of this piece and to share it withour audiences.”After Apollo 17 28 on Earth, Nixon 29 379 pieces of the satellite stone to all the states as well as foreign nations. Over time, those gifts began to 30 A 2002 search found that many were unaccounted for. To date, the fate(命运)of 171 rocks remains 3112. A．painting B．ball C．book D．collection13. A．linking B．featuring C．sharing D．obtaining14. A．read B．stress C．think D．remember15. A．normal B．new C．precious D．similar16. A．gift B．signal C．threat D．change17. A．sometimes B．somehow C．instead D．never18. A．borrowed B．returned C．owned D．lost19. A．paid B．earned C．saved D．charged20. A．carry B．prepare C．push D．buy21. A．passed B．contacted C．recognized D．trusted22. A．attracted B．added C．pointed D．reported23. A．work B．find C．receipt D．letter24. A．delivery B．discovery C．construction D．treatment25. A．eager B．responsible C．famous D．grateful26. A．reason B．demand C．concern D．claim27. A．likely B．free C．embarrassed D．excited28. A．landed B．existed C．wandered D．failed29. A．threw away B．put aside C．turned in D．handed out30. A．improve B．disappear C．drop D．matter31. A．unforgettable B．unacceptable C．unknownD．undoubted三、七选五阅读I love learning foreign languages so much that I learn a new language every two years. When people find I’m a polyglot(通晓多种语言的人)，they always ask me,“How do you do that?” Honestly, my answerwill be, “I don’t know. I simply love learning languages.” 32 They want to know why they spend years learning even one language, never achieving fluency, and what’s the secret of being polyglots.33 And what do we have in common? I decided to find that out. I went to several events where language lovers gather to practice their languages, asked dozens of polyglots about methods they use, and heard dozens of approaches. Everybody seems to have a unique way to speak several languages fluently.34 All these polyglots talked about language learning as if it was great fun. They found ways to turn language learning from aboring subject into a pleasant daily activity. You should have seentheir faces when they were showing me their colorful grammar charts and handmade flash cards. 35 The methods are various, but they make sure it’s something enjoyable.I realized it’s actually how I learn. 36 Then interesting programs became my choice. So all is clear. If you don’t like writing words down on paper, type them in an app. If you’re a shy perso n, apply self-talk at home. This is how polyglots learn languages, and the best news is that it’s available to anyone willing to take the learning into their own hands.A．How can those with little talent be fluent?B．But people are never happy with the reply.C．There’s no shortcut to learning languages for anyone.D．One of them even made recipes in a foreign language.E．That made me wonder, too, how other polyglots actually do it. F．When learning Spanish last year, I was bored with textbooks. G．Polyglots simply found ways to enjoy the language-learning process.四、语法填空阅读下面短文, 在空白处填人1个适当的单词或括号内单词的正确形式.May 21st this year marks the first International Tea Day, which37 (name) by the United Nations on November 27th, 2019. To celebrate38 festival, a number of events took place at the ChineseBusinessman Museum in Beijing on Thursday.The chairman of the China Culture Promotion Society addressed the opening ceremony.“As a main promoter of the International Tea Day,the birthplace of tea and the 39 (large) tea-producing country, China has a 40 (responsible) to work with other countries to promote the healthy development of the tea industry. It can help tobuild a community with a shared future 41 mankind,” he said.Th e “First International Tea Day Tea Road Cooperative Initiative” issued (发布) at the ceremony calls for people working in the teaindustry to come together to promote (促进） international cooperation 42 cultural exchanges. A four-year tea promotion-Tea RoadCooperative Plan-was also issued in accordance with the initiative.___42___ (strengthen) the connection with young people, the event included a number of public promotional activities on social media,___43___( invite ) twenty-nine tea professionals from around the worldto have thirty-six hours of uninterrupted live broadcasts.The Chinese Ancient Tea Museum was 43 (official) unveiled(揭幕) at the ceremony, opening 44 (it) first exhibition: The Avenue of Truth - A Special Exhibition o f Pu’er Tea.五、应用文写作47. 假定你是李华，你校将举办以“English Literature Reading”为主题的英语原阅读活动，请你用英语为本次活动写一则宣传稿，内容包括：(1)活动目的；(2)活动安排；(3)发出号召。

40分钟限时练习（1）一．选择题（共8小题，满分24分，每小题3分）1．（3分）﹣8的倒数是（ ）A ．8B ．18C ．−18D ．﹣8 2．（3分）若√x+2x有意义，则实数x 的取值范围为（ ） A ．x ＞﹣2 B ．x ≥﹣2 C ．x ＞﹣2且x ≠0 D ．x ≥﹣2且x ≠03．（3分）2022年11月5日，“长征三号”运载火箭在西昌卫星发射中心点火起飞，随后将“中星19号”卫星准确送入高度为35800千米的预定轨道，发射任务取得圆满成功．该卫星主要为跨太平洋重要航线、东太平洋海域及北美西海岸等覆盖区域提供通信服务．数据35800用科学记数法表示为（ ）A ．0.358×105B ．358×102C ．3.58×104D ．3.58×105 4．（3分）分式方程1x−2=3x 的解为（ ） A ．x ＝3 B ．x ＝2C ．x ＝1D ．无解 5．（3分）已知点（﹣2，3）在反比例函数y =k x 的图象，则下列各点也在该图象上的是（ ）A ．（2，3）B ．（1，﹣6）C ．(6，−12)D ．（0，0）6．（3分）计算2sin 30°的值为（ ）A ．1B ．√3C ．2D ．2√37．（3分）一个多边形的内角和的度数可能是（ ）A ．1700°B ．1800°C ．1900°8．（3分）下列图形中，既是轴对称图形也是中心对称图形的有（ ）A ．4个B ．3个C ．2个D ．1个二．填空题（共8小题，满分32分，每小题4分）9．（4分）因式分解：ma 2﹣2am +m ＝ ．10．（4分）化简：3m 2n9m = ．11．（4分）如图，四边形OABC 是矩形，OC 在x 轴上，OA 在y 轴上，函数y ＝x 的图象与AB 交于点D （3，3），点E 是射线BC 上一点，沿DE 折叠点B 恰好落在函数y ＝x 的图象上，且BE ＝2CE ，则点B 的坐标为 ．12．（4分）已知下列命题：①若a2＝b2，则a＝b；②2022年全年鄂尔多斯市一般公共预算累计完成842.8亿元，用科学记数法表示为8.428×1010元；③二元一次方程2x+y＝6的正整数解有3对；④连接两点之间的线段叫做两点之间的距离．是真命题的是.（只填序号）13．（4分）为了落实“双减”政策，减轻学生作业负担，某学校领导随机调查了九（1）班学生每天在作业上共花费的时间，随机调查了该班10名学生，其统计数据如下表：则这10名学生每天在作业上花费的平均时间是小时．时间（小时）43210人数2421114．（4分）如图，四边形ABCD中，E、F、G、H依次是各边中点，O是四边形内一点，若S四边形AEOH＝3，S四边形BFOE＝4，S四边形CGOF＝5，则S四边形DHOG＝．15．（4分）如图，在▱ABCD中，∠ABC＜90°，⊙O与它的边BA，BC相切，射线BO交边AD于点E．当AB＝6，AD＝8时，DE的长等于．16．（4分）如图，点A是反比例函数y=kx（k≠0，x＜0）图象上一点，过点A作AB⊥y轴于点D，AD＝DB．若点C为x轴上任意一点，且S△ABC＝9，则k的值为．三．解答题（共4小题，满分44分）17．（10分）计算：（1）（√12−√13）×√3+(12)0；（2）（m ﹣1）2﹣m （m ﹣3）．18．（10分）计算．（1）{x −y =12x +5y =9；（2）3x +2≤﹣2（x ﹣2）．19．（12分）为了解市民对全市创卫工作的满意程度，某中学数学兴趣小组在全市甲、乙两个区内进行了调查统计，将调查结果分为不满意，一般，满意，非常满意四类，回收、整理好全部问卷后，得到下列不完整的统计图．请结合图中信息，解决下列问题：（1）求此次调查中接受调查的人数，并补全条形统计图．（2）若本市人口300万人，估算该市对市创卫工作表示满意和非常满意的人数．（3）兴趣小组准备从调查结果为不满意的4位市民中随机选择2位进行回访，已知4位市民中有2位来自甲区，另2位来自乙区，请用列表或用画树状图的方法求出选择的市民均来自同区的概率．20．（12分）如图，在△ABC中，AB＝AC，D是边BC延长线上一点，连接AD．AE∥BD，∠BAC＝∠DAE，连接CE交AD于点F．（1）若∠D＝36°，求∠B的度数；（2）若CA平分∠BCE，求证：△ABD≌△ACE．。

高三英语晚自习限时训练一、阅读理解AFun things to do in high schoolLearn another languageYour school might be holding foreign languages classes, so this is a great way to start your language learning journey! If you want more self-paced learning, apps like Duolingo are easily accessible (可使用的) on our mobile phones. As our world becomes more in terconnected, it’s always good to learn another language or two.Aim for a semester (学期) of straight AThis can be a difficult task but not impossible to achieve, as long as you put in the right amount of work and effort. If you are struggling(挣扎)with your grades, you can host or join group studies with your classmates!Don’t be disheartened if you are not able to get an A in a semester. What’s important is having the drive to go forward. As a famous person once said, “He who would climb a ladder must begin at the bottom.Experience another cultureCulture and tradition are something that all humans share. No matter where we come from, we always bring our culture with us. People coming from different cultures may be among your friends or neighbors.You can go to a museum, read a book, or try new food in your area. Remember to keep an open mind and take the time to learn about them.Bring a shareable treat to classIf you know your way around the kitchen, you can impress your class by making and bringing them a delicious treat! Not only will this make their stomachs happy, but you’ll also bond (联系) the whole class together. Just don’t forget to check with your teacher first before bringing one.1. What should you do if you want to learn a language at your own speed?A．Go to a museum to read books. B．Attend another language class. C．Learn it on an app like Duolingo. D．Join group studies with your classmates.2. What’s the key if you can’t get an A in a semester?A．Keeping an open mind. B．Asking your teachers for help. C．Changing your study method. D．Having the drive to go forward.3. What will probably be the result if you bring a treat to class?A．Experiencing different cultures. B．Making your teacher angry and anxious. C．Making some students have a stomachache. D．Making your classmates happy and united.BIn large population studies, people who eat lots of fruits and vegetables high in vitamin C appear to have a reduced risk for various types of cancer, including cancers of the mouth and lung. But it’s not clear that these benefits come specifically from vitamin C．The Age-Related Eye Disease Study found that a daily supplement containing 500 mg of vitamin C can help slow the progress of macular degeneration, an age-related eye disease that causes vision loss. But we don’t know what benefits, if any, are provided by vitamin C in particular.Many people take vitamin C supplements in unnecessarily high doses to prevent or treat various conditions for which its effectiveness is unproved. The vitamin C supplements have variously been said for staving off sunburn and improving the appearance of wrinkles. None of these benefits have been confirmed in scientific studies.Perhaps the best-known and most widely promoted use of high-dose(高剂量)vitamin C is to prevent or treat the common cold. Most of the evidence shows that high-dose vitamin C will, at most, shorten a cold by one day. In ordinary circumstances, vitamin C has no preventive value, although a few studies have reported a 50% reduced risk of developing colds among people taking vitamin C in extreme circumstances-for example, skiers, marathon runners, and soldiers working in extreme conditions.The recommended vitamin C dosage per day for healthy women is 75 mg per day. For adults, the highest safe daily intake is likely to be 2, 000 mg per day. Vitamin C is water-soluble, so any amount more than you need will not be stored in the body. It’s safe in almost any amount from foods, and supplements in recommended amounts are also regarded as safe for most people. In some people, high doses-more than, say, 2, 000 or 3, 000 mg per day-can cause a variety of symptoms. People with kidney conditions should take no more than 1, 000 mg a day.；4. What can we learn about vitamin C in the first paragraph?A．It can be of better effect in higher doses.B．It can be a cure for age-related eye disease.C．It can help slow the progress of some illness.D．It can reduce the risks of the mouth cancer.；5. What function does vitamin C have intreating the common cold?A．It can help people save plenty of money.B．It can stop soldiers from catching a cold.C．It may reduce a cold by one day at most.D．It may prevent the common cold efficiently.；6. How much Vitamin C are healthy women advised to take per day?A．75 mg.B．500 mg.C．2, 000 mg.D．3, 000mg.；7. Where is this text probably taken from?A．An exam paper.B．A travel journal.C．An art guidebook.D．A science magazine.CThis year will have been the warmest in the UK, the Met Office has said. Although for many people the record from the year that attracted the most attention was that the summer heatwave reached 40. 3℃, the organization said that more significant was a figure 30 degrees lower-the average temperature over the course of the year.Although the exact temperature will need to be confirmed in the new year, the Met Office predicted that 2022 is going to exceed (超过)the previous record for the warmest annual average, which was 9. 88C in 2014. Apart from this month, every other month in the UK in 2022 was warmer than average. New Ye ar’s Day 2022 was the warmest on record, exceeding 16℃ in North Wales. Dr. Mark McCarthy, head of the National Climate Information Centre, said: “While many people will remember the summer’s extreme heat, what hurts people most, especially the elderly, this year is the relatively consistent heat through the year. ” Although this summer was the fourth warmest on record, it was the first in which the temperature exceeded 40℃.McCarthy said that we can expect to see increasingly warmer summers as a consequenc e of climate change. “The warm year is in line with the impacts we expect as a result of human-related climate change, ”he said. “Although it doesn’t mean every year will be the warmest on record, climate change continues to increase the chances of increas ingly warm years over the coming decades. ”Rebecca Newsom, head of politics at Greenpeace UK, said: “These aren’t the kind of records you want to be breaking. Record-breaking investment in the renewable technologies will get us out of this mess.At present though, Britain is ready for rain, with forecasters warning of difficult driving conditions caused by wet weather over the next few days. Although temperatures will stay mild for much of the UK, the Met Office warned that the rainfall will hit England and Wales this Saturday and Sunday.；8. What will make this year special in the UK?A．The most visitors will be attracted.B．The warmest year will take place.C．The biggest success will be achieved.D．The highest temperature will be 30℃.；9. What can be inferred from Paragraph 2?A．Every month in the UK was warmer than average.B．Next summer may be the first summer to exceed 40℃.C．Many elderly men may go to hospital for the high heat.D．New Year’s Day was the warmest on record in England.；10. What does Rebecca think of the future climate?A．Renewable energies can fight climate change well.B．Record of high temperature will be broken next year.C．Politicians should be responsible for the current mess.D．Warm summers are a consequence of human activities.；11. What is the weather like in Wales this weekend?A．Sunny.B．Snowy.C．Cloudy.D．Rainy.二、七选五阅读Since I’ve been living abroad, many different people have asked me to name typical British dishes. I have, however, struggled to think of an answer. Yes, we do have our own national dishes. 12Fish and chips, as you could guess, is made up of battered fish and chips. It is often accompanied by mushy peas (豌豆糊), which consists of peas mashed up to form a thick paste. The majority of British people really do love this dish but it is not something that we would eat, say, on a weekly basis. 13 British people associate this dish with the seaside and it’s something that will usually be eaten on a day trip there.14 This is made up of roast meat, usually chicken or beef, accompanied by roast vegetables and a meat sauce. It is usually eaten on a Sunday, perhaps for a special family dinner.Although we do have our traditional dishes, we do not eat these on a daily basis. On a daily basis many British people will eat rice or pasta dished. 15 You can see this by looking at the range of international foods in the supermarket or at the va riety of different restaurants you can find on our high streets.16 However, perhaps unlike other countries, we tend to prefer to cook recipes influenced by other cuisine.A．We eat them as the seasons change.B．But how much do we actually eat them?C．In conclusion, we do have our national dishes.D．Another favourite British dish is the roast dinner.E．Our diet has been greatly influenced by other countries.F．It’s also not usually something that you would cook at home.G．You’ll be served a traditional dish if you get invited for dinner at a British family’s home.三、完形填空The public library is one of the greatest inventions humankind has ever imagined and actually made happen. Libraries are a (an) 17 , quiet place where all people can hang out and read, without having to 18 anyone anything. Apart from being a place that is full of 19 to borrow, libraries are something that offers 20 and warmth. A post on Twitter celebrating the wonderfulness of libraries 21 this point perfectly.“Today a woman with developmental disabilities came into the library, and she was 22 ,” wrote a Twitter user. “She didn’t 23 her address, but her phone number was in her pocket on a piece of paper with Elmo on it. She kept saying, ‘The library is a safe place.’We called and her guardians (监护人) came right over. It seemed that they were not worried at all. Apparently this happens pretty 24 . They even stayed long enough for her to 25 some new books and Sesame Street DVDs. The library is a safe place indeed.”The post 26 others to share their own stories of libraries being safe places for them, and it’s enough to 27 even the hardest of hearts. For people who grew up in dysfunctional (功能失调的) homes, the library can be a safe heaven of calm and kindness. For people lacking financial means, the library is a space that provides free education and free entertainment, as well as a free indoor place to go. This is the reason why 28 people grouped to libraries when they have nowhere else on earth---the only place that doesn’t 29 money. We cannot understate Literal lifesavers. Libraries also fill up a lot of gaps in other social 30 and help people find their way to information about other opportunities. They open the doors to so many 31 .17. A．calm B．noisy C．nervous D．amusing18. A．ask B．pay C．afford D．beg19. A．supplies B．stationery C．books D．cafeterias20. A．support B．assistance C．shelter D．safety21. A．declared B．explained C．tackled D．discovered22. A．trapped B．lost C．anxious D．delighted23. A．know B．search C．conceive D．cover24. A．exactly B．accurately C．regularly D．fluently25. A．work out B．come out C．bring out D．check out26. A．spread B．inspired C．impressed D．contacted27. A．bother B．surprise C．fund D．warm28. A．heartbroken B．homeless C．hopeless D．elderly29. A．require B．quit C．recommend D．spend30. A．research B．communities C．services D．designs31. A．memories B．problems C．advertisements D．possibilities四、语法填空阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式When I was in the middle school, I founded a student club 32 (name) “green planet” inspired by Chai Jing’s documentary Under the Dome. At first people knew this club. As a result, we had only 15 members. And I 33 (laugh) at for being crazy. However, I didn’t lose heart and I insisted. Every day, we club y members broadcast weather reports and PM 2.5 levels. We then published articles and pictures of theserious 34 (pollute) of the city on the school website. Meanwhile, my club also shares suggestions 35 how to live a low carbon life on the school board, for example: take public transportation or car pool to school; do 36 (little) shopping and so on.37 time went by, more are what students showed great interest in our club.And luckily, I persuaded my headmaster to join us. After what seemed ages of waiting, the club was finally accepted by the majority of students in my school. An increasing number of students supported 38 (ours).Since then, we’re worked together 39 (promote) our club. And up to now, 85% of the students 40 (join) us and enjoyed the simple but eco-friendly life.Such is Joy, 41 responsible and persistent girl.五、应用文写作42. If you’re Li Hua. I’m going to plant trees by the river with my classmates this weekend. Please write an email to Nancy and invite her to join us.Contents include: 1. Gathering time and place;2. Activity arrangement and reminder;3. Lunch and return time.Limitations: 1. The number of words is about 100. 2. You can add appropriate details to make your writing coherent.参考答案1. C2. D3. D4. C5. C6. A7. D8. B 9. C 10. A 11. D12. B 13. F 14. D 15. E 16. C17. A 18. B 19. C 20. D 21. B 22. B 23. A 24. C 25. D 26. B27. D 28. B 29. A 30. C 31. D32. named33. was laughed34. pollution35. on/about36. less37. As38. us39. to promote40. have joined41. a42. Dear Nancy,My classmates and I are planning to plant trees by the river this weekend. We all hope you can join us. Here is the schedule.We are to meet at the school gate at 8 o'clock this Saturday morning. Since we'll cycle there and work in the field, you'd better wear casual clothes and comfortable shoes. It would be much better if you could bring some necessary tools. Besides, we'll have a picnic there. Everyone is expected to bring their lunch and share it. Maybe we will return at around 3 o'clock in the afternoon.Would you like to join us? Hope to see you then.Yours,Li Hua。

1f牛顿运动定律限时训练113．（2012上海卷）．如图，光滑斜面固定于水平面，滑块A、B叠放后一起冲上斜面，且始终保持相对静止，A 上表面水平。

则在斜面上运动时，B受力的示意图为（）14．一个质量为50 kg的人，站在竖直向上运动的升降机地板上，他看到升降机中挂着重物的弹簧测力计示数为40 N，已知重物质量为5 kg，若g取10 m/s2，这时人对升降机地板的压力()A．大于500 N B．小于500 NC．等于500 N D．都不对15．(2013·新课标全国卷Ⅰ)图是伽利略1604年做斜面实验时的一页手稿照片，照片左上角的三列数据如下表．表中第二列是时间，第三列是物体沿斜面运动的距离，第一列是伽利略在分析实验数据时添加的．根据表中的数据，伽利略可以得出的结论是()A.物体具有惯性B．斜面倾角一定时，加速度与质量无关C．物体运动的距离与时间的平方成正比D．物体运动的加速度与重力加速度成正比16、（2013年浙江卷）如图所示，水平木板上有质量m＝1.0 kg的物块，受到随时间t变化的水平拉力F作用，用力传感器测出相应时刻物块所受摩擦力F f的大小．取重力加速度g＝10 m/s2，下列判断正确的是() A．5 s内拉力对物块做功为零B．4 s末物块所受合力大小为4.0 NC．物块与木板之间的动摩擦因数为0.4D．6 s～9 s内物块的加速度大小为2.0 m/s217．关于牛顿第二定律，正确的说法是()A．物体的质量和合外力成正比，跟加速度成反比B．加速度的方向一定与合外力的方向一致C．物体的加速度跟物体所受的合外力成正比，跟物体的质量成反比D．由于加速度跟合外力成正比，整块砖的重力加速度一定是半块砖重力加速度的2倍218．如图所示，在马达的驱动下，皮带运输机的皮带以速率v 向右水平运行，现将一块砖正对皮带上的A 点轻轻地放在皮带上，此后( )A ．一段时间内，砖块将在滑动摩擦力的作用下对地做加速运动B ．当砖的速率等于v 时，砖块与皮带间摩擦力变为静摩擦力C ．当砖块与皮带相对静止时它位于皮带上A 点的右侧的某一点D ．砖块在皮带上有可能不存在与皮带相对静止的状态19．(2012·新课标全国高考)伽利略根据小球在斜面上运动的实验和理想实验，提出了惯性的概念，从而奠定了牛顿力学的基础．早期物理学家关于惯性有下列说法，其中正确的是( )A ．没有力的作用，物体只能处于静止状态B ．物体抵抗运动状态变化的性质是惯性C ．行星在圆周轨道上保持匀速率运动的性质是惯性D ．运动物体如果没有受到力的作用，将继续以同一速度沿同一直线运动20．某科技兴趣小组用实验装置模拟火箭发射卫星．火箭点燃后从地面竖直升空，燃料燃尽后火箭的第一级第二级相继脱落，实验中测得卫星竖直方向的速度—时间图象如图所示，设运动中不计空气阻力，燃料燃烧时产生的推力大小恒定．下列判断正确的是( )A ．t 2时刻卫星到达最高点，t 3时刻卫星落回地面B ．卫星在0～t 1时间内的加速度大于t 1～t 2时间内的加速度C ．t 1～t 2时间内卫星处于超重状态，t 2～t 3时间内卫星处于失重状态D ．卫星在t 2～t 3时间内的加速度等于重力加速度21．质点所受的力F 随时间变化的规律如图所示，力的方向始终在一直线上，已知t ＝0时刻质点的速度为零，在图所示的t 1、t 2、t 3和t 4各时刻中( )A ．t 1时刻质点速度最大B ．t 2时刻质点速度最大C ．t 3时刻质点离出发点最远D ．t 4时刻质点离出发点最远（2011北京）（16分）如图所示，长度为l 的轻绳上端固定在O 点，下端系一质量为m 的小球（小球的大小可以忽略）。

高一英语限时训练（1）I. 阅读理解AAI is short for artificial intelligence (人工智能).Scientists have been working to improve AI models, mainly by training the models on larger and larger collections of information. Those works are paying off. Quite powerful AI tools have surprised even their creators with what they can do.Some recent models can create music based on people’s choice of mood (气氛), style and length. Some can create realistic photos from a short-written description. Others can recreate anyone’s voice saying anything based on a voice recording just a few seconds long.But the AI tool that’s gotten the most attention recently is ChatGPT, created by the company OpenAI. ChatGPT is used to generate text (create writing). When asked a question, ChatGPT answers quickly in perfect sentences. It makes up stories and games, writes articles, programs computers, and much more. ChatGPT appears to be highly intelligent. But really, ChatGPT is simply guessing — based on its training information — which word is most likely to come next.Last month, OpenAI introduced a more powerful model, called GPT-4, which can create and explain jokes, and pass tests that are difficult for humans. The rapid progress and more general skills of recent AI models worry some people. Last week, many computer experts wrote an open letter calling for a six-month pause (暂停) for any work on AI tools stronger than GPT-4.The letter said AI companies were in a race to create “powerful digital(数字的) minds” that no one can “understand, predict (预测), or ...control”. The group behind the letter wants governments to develop laws to make sure Al tools are safe.Many AI experts express their views on the letter. Some say the letter makes today’s AI tools sound more intelligent than they really are. Others say it’s more important to worry about the real problems of AI tools at present rather than imaginary ones there might be in the future.Many companies are likely to keep developing powerful AI tools. But the letter has senta strong warning that many people will be thinking about carefully.1. What is paragraph 2 mainly about?A. Future possibilities of AI tools.B. Impressive abilities of AI tools.C. Serious problems with AI tools.D. Suggested improvements for AI tools.2. Why does the author mention GPT-4 in paragraph 4?A. To introduce a new AI model.B. To describe AI models’ future.C. To compare different AI models.D. To show AI models’ fast progress.3. For what purpose did many computer experts write an open letter?A. To explain the idea of AI.B. To speed the spread of Al.C. To slow down AI development.D. To predict the risk of AI research.4. What is many AI experts’ attitude to the letter according to paragraph 6?A. Carefree.B. Favorable.C. Uncertain.D. UnsupportiveBEmperor penguins (帝企鹅) live on the faraway and very cold Antarctic coasts. Because of the hard conditions of emperor penguins’ natural home, some groups are unreachable for humans, making these birds hard to study.Satellites (machines that have been sent into space and go around the Earth) have come to help penguin researchers search Antarctic coasts for penguin groups. Recently, satellite imagery (影像) has shown a new penguin group. It’s small, but can be seen from space.Peter Fretwell, a scientist at the British Antarctic Survey, was looking for melting (融化的) sea ice when he saw a new penguin group. The new group is relatively small. It has only about 1,000 adult penguins, or 500 breeding pairs. But, as one of only 66 emperor penguin groups now known to researchers, it was an important addition. This group, like all the others discovered by satellite, could be seen from space because penguin waste builds up near groups and makes the snow dark brown.After Fretwell’s team saw the dark brown snow, they confirmed (确认) their discovery with satellite imagery. The penguins, seen as small round marks in the imagery, could be seen in pictures taken by the Maxar WorldView-3 satellite, which can find objects less than a foot long. The Maxar WorldView-3 imagery is what researchers used to decide that the group had a population of about 1,000 penguins.Philip Trathan, another scientist at the British Antarctic Survey, said, “Although we’ve found more than 60 groups, the grounds are all in the places where recent studies suggest emperor penguins will decline. Birds in these grounds are probably at risk — we need to watch these grounds carefully as climate (气候) change will have an influence on this area.”The finding of this new group is promising news for the future of penguins. With climate change and other human influences on their environment, it’s encouraging to know that there are still places where penguins can grow or develop well. These pictures give us hope that if we work to protect penguins’ homes, they will continue to be a part of our planet for years to come.5.What problem have researchers been facing when studying emperor penguins?A. Some of their groups are out of reach.B. Their natural home is too large to explore.C. Satellites cannot find groups that are small.D. Satellite imagery cannot show their numbers clearly.6. Which of the following played a key role in confirming the new penguin group?A. The penguin waste.B. The melting sea ice.C. The marks the penguins have.D. The snow the penguins built up.7. What might the underlined word “decline” in paragraph 5 mean?A. Show up.B. Become fewer.C. Develop better.D. Come together:8. How does the author sound in the last paragraph?A. Curious.B. Worried.C. Hopeful.D. HumorousII. 7选5阅读While it’s important for adults to understand how to manage their money, it’s also helpful to teach their children about making smart choices with money. This can help them avoid money problems in the future.Ellen Sabin is the author (作者) of “The Nickels, Dimes, and Dollars Book: A Wise Kid’s Guide to Money Matters”. 1 .Behavioral researchers at Cambridge University say that parents should start teaching their kids about money as young as three years old. 2 . Children in this age group often ask questions about money, which can be a great opportunity (机会) for parents to help them understand money choices and the importance of money in life.Parents can start talking to their kids about money to help them understand why it’s important. “Kids may not think about saving for college, so parents can encourage them to pretend (假装) they are an adult and make decisions between ‘wants’ and ‘needs’. 3 ,” Sabin recommends.Another way parents can help their children learn about the importance of money is by using a “show-and tell” method. 4 . Parents can use the chance to show their kids how to make wise decisions within a certain budget (预算). Sabin says by doing this, parents can help their kids feel good about money and become comfortable with it.5 . Sabin notes that kids enjoy running their own businesses, such as lemonade stands, which shows they value making money. This can help children understand the importance of hard work and the value of money.A. Parents don’t really know how to talk about these topicsB. Kids are always curious about where money comes fromC. She hopes children can learn the basics of money at a young ageD. For example, money can be discussed while having meals or shoppingE. This can help children learn how to make responsible spending choicesF. Parents can also encourage their children to make money through workG. However, Sabin’s book recommends ages 6-11 as the best time for making kids dollar-wiseIII. 完形填空Ever since he was 6 years old, Josiah Colton has wanted to save the Earth.Now 10, the fifth-grader has already started a 1 . Through it, he collects recyclables (可被回收的物品)from businesses and donates part of the proceeds (收益) to “charity: water”, an organization that provides 2 to people around the world.Josiah is now a charity: water “Tiny 3 ” who runs his company, J Go Green, from his home. He said his mission(使命) to reduce, reuse, and recycle while also providing clean drinking water started 4 .“Since I was six years old I have really been into 5 ,” he wrote on his website.“When I 6 how much we hurt animals by the way we live, I made it my mission to find better ways to keep the Earth 7 . Every Saturday, Josiah goes to local businesses and private homes to 8 cans and bottles. He then takes these recyclables to a nearby recycling center, where he gets 9 to donate to charity: water. 10 doing the legwork, Josiah also offers practical tips for reducing waste and going 11 around the house on the Internet.His 12 includes ideas like replacing lightbulbs (灯泡) with energy-saving LED bulbs, 13 your own garden, buying cleaning products in bulk (大量) to reduce wasteful packaging, and more.Josiah said he feels really 14 about all that he’s achieved so far, and he 15 making an even bigger difference in the future. He said, “Everyone can help, no matter who you are or how old you are.”1. A. club B. course C. competition D. company2. A. water B. food C. training D. housing3. A. Baby B. Winner C. Hero D. Leader4. A. secretly B. simply C. rapidly D. recently5. A. science B. sports C. business D. animals6. A. found out B. depended on C. worked out D. talked about7. A. clean B. safe C. alive D. warm8. A. sell B. wash C. fill D. collect9. A. bottles B. money C.jobs D. energy10. A. Because of B. Instead of C. Along with D. Except for11. A. fast B. green C. crazy D. wrong12. A. aim B. answer C. action D. advice13. A. visiting B. planting C. designing D. improving14. A. good B. funny C. shy D. confident15. A. looks up to B. looks down on C. looks forward to D. looks back on IV. 语法填空For many years, people have been worried that one day, robots could take their jobs. Now, it 1. (seem) that it may start happening.ChatGPT is 2. AI chatbot, which is the fastest-growing app It had 100 million active users just two months after 3. (it) start. Experts started to worry that the latest chatbots could harm the careers (事业) of anyone who works with information, does research or writes reports.Chatbots are very creative, and can do things that we thought only humans could do. So an increasing number 4. users see this as a business chance. They will start using a chatbot as a staff member (职员) that may 5. (compare) to a newly employed graduate in terms of its 6. (able) to think.Chatbots work very fast, without 7. (need) a break or pay, and for business people, that’s 8. (extreme) important. Some UK law companies have alreadyrealized it 9. started using chatbots to write legal (法律的) letters or provide ideas for legal matters. Basically, these companies are using chatbots as outside 10. ___________ (helper) to make their work easier.。

解析
A项均为介词，表被动。
B项连词，表承接，于是，就/副词，表肯定，就是。 C项连词，表转折/后者为连词，表递进。 D项和“为”字配合使用，表被动/用在动词之前，构成名词性词组。
解析答案
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3.下列对原文有关内容的概括与赏析，不正确的一项是( 知州，但很快又被提拔，担任三司度支判官。
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李氏居京城北崇庆里，凡七世不异爨，至昭述稍自丰殖，为族人所 望，然家法亦不隳。 注 噍类：活着的人或活的动物。 (选自《宋史· 列传第二十四》，有删改)
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1.对下列句子中加颜色词语的解释，不正确的一项是( B )(3分)
A.其谋遂寝 寝：停止
B.向非公，无噍类矣
民者凡数千顷，昭述悉复之。以太常博士知开封县，特迁尚
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徙湖南潭州，戍卒愤监军酷暴，欲构乱，或指昭述谓曰：“如李公长
者，何可负？”其谋遂寝。昭述闻之，以戒监军，监军自是不复为暴。比
去，众遮道罗拜，指妻子曰：“向非公，无噍类[注]矣。”
徙淮南转运使兼发运使，加直史馆。徙陕西转运使，纠察在京刑狱，
以万超为行营壕砦使。河中平，拜怀州刺史。
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周祖开国从征慕容彦超又为都壕砦使以功授洺州团练使预收秦凤改
莱州从平淮南连移蕲登二州所至有善政。属有诏重均田租，前牟平令马