限时训练9-12

九年级英语限时训练（附参考答案）一．根据句意及首字母和汉语提示完成句子。

1.The official newspaper c_________the news of Tiangong-I,for it took a big step forward into space.2.The idiom(成语）:“Meng zi’s mother makes three moves”tells of a mother who did all she could to provide the best e_________for her child.3.The young lady w _______hair is blond comes from Australia.4.Sometimes, you won’t know the true value of a moment u_______it becomes a memory.5.Good _______(发音）will impress others and make yourself confident.二．完形填空（共10小题；每小题1分，满分10分）There was a garden full of plants. In the corner of the garden, a 6 rose grew. She was the most beautiful flower there. She was as white as snow, 7 the plants around her were shocked at her beauty. But the white rose couldn’t see 8 , so she didn’t know how beautiful she was.Sometimes, she was even a little envious (羡慕的) of the sunflowers around her. She hoped that she could be as 9 as them.One sunny day, a girl went into the 10 . She walked around and was amazed at the beauty of na ture. Suddenly, she saw the white rose. “It hasn’t rained for days,” said the girl. “And the weather report says it will continue to be 11 for a few days. If the rose stays here, it will 12 soon. I’ll take it home and put it in my beautiful vase(花瓶).”The white rose was put in a lovely vase by the window. From the reflection in the window, the white rose saw herself for the 13 time. “Is that me?” she was shocked. “Till now I didn’t 14 how beautiful I looked.”Sometimes, we think other people are very great and 15 know our own advantages. This makes us feel less confident of ourselves. Look into your heart, and you’ll find how great you are.6. A. white B. red C. blue7. A. or B. but C. and8. A. herself B. himself C. yourself9. A. quiet B. lovely C. lonely10. A. park B. corner C. garden11. A. rainy B. cloudy C. sunny12. A. leave B. die C. cancel13. A. first B. second C. third14. A. improve B. realize C. suppose15. A. always B. usually C. never三．综合填空（共10小题；每小题2分，满分20分）根据短文内容，用方框中所给词语的适当形式填空，使文章通顺、完整。

九年级英语限时训练（附参考答案）（满分40分，时间30分钟）一.单词拼写（共5小题，每题2分，满分10分）根据句意和首字母或汉语提示，将单词的正确形式完整地写在横线上。

1. —Cindy, what kind of restaurants do you like ?—I p_____ restaurants that can provide customers with free Wi - Fi.2. Mr.King is very P ______. He often explains difficult problems many times until we understand.3. It’s_________（危险的）for people to use the mobile phone while crossing the street.4. China has been making many great _____（成就）in every field these years, which amazes the world.5. Teenagers should be_________（鼓励）to learn and spread Chinese traditional culture.二、综合填空（共10小题，每题2分，满分20分）根据短文内容，用方框中所给词语的适当形式填空，使文章通顺、完整。

（每词限用一次）hour, power, a, matter, pain, compete, good, point, keep, createEileen Gu was born in San Francisco, California to an American father and a Chinese mother. While 6._______ for the United States in her earlier years, Gu announced her decision to ski for China in 2019 after her first World Cup Italy. In the interview, Gu mentioned her 8.5 7.______training a day, which gives her the confidence to win.She scored 1,580 8. ________out of a maximum 1,600 in the SAT, the test used for college admissions in the United States. “I encourage you all to step out of your comfort zone to show the boys that girls are just as 9._________ as they are.” Gu said. “I’m not trying 10._________ anyone happy. I’m 11.________18-year-old girl living my best life. It doesn’t really12. _____ if other people are happy or not, because I feel I am doing my 13._______. I’m enjoying the entire process and I’m using my voice 14._______ as much positive change as I can, fo r the voice that will listen to me.”She’s not afraid of hardship, tiredness, and 15.______ .she’s especially positive and optimistic. she’s quite burning. A ball of flame was surrounding her.三、阅读理解（共5个小题，每题2分，满分10分）阅读下面的短文，从每题所给的A、B、C、D四个选项中，选出最佳答案。

九年级语文周测11月23日姓名分数一、基础·运用“自强不息”是中华民族生生不息的力量源泉。

某校初三年级开展以“君子自强不息”为主题的综合实践活动，诚挚邀请你参与到活动中来!【追本溯源明“自强”】“天行健，君子以自强不息。

”这是《易传》开篇中的一句话，讲的是天道刚健，周而复始，永无止息，启示人们应效法天道，自强不息。

自强不息，首先强调的是刚健有为，积极进取。

孔子曰：“三军可夺帅也，匹夫不可夺志也。

”他为了自己的人生追求，“学而不厌，诲人不倦”“【甲】”，成为坚忍刚毅、奋斗不止精神的典范。

图强求变、创新超越也是自强不息精神应有之义。

“刚健笃实，辉光日新”“【乙】”，这些(zhēn)言都体现出古人对创新的追求，而中华民族发展史上的一个个发明创造、一次次革故鼎新，则是自强不息精神在创新实践中结出的累累硕果。

自强不息的精神还表现为无私忘我的人生境界。

古代文人恪．守孔孟之道，将“君子以自强不息”的内涵诠释得生动而透彻。

尽管仕途多舛，他们也依旧高洁自守不同流合污；虽然身遭贬谪，他们却依然高声吟唱“【丙】”；即使身居偏远的江湖，他们也要尽其所能造福一方百姓。

1.文段中画横线字的笔顺、根据拼音写的汉字、加点字的读音，全都正确的一项是( )A. “匹”的第二笔为“”箴言kèB. “匹”的第二笔为“”箴言kèC. “匹”的第二笔为“”真言gèD. “匹”的第二笔为“”真言gè2.小明要向同学们解释“自强不息”的意思，他从字典中查阅了“息”的词义。

下面是其中的三个解释：①呼吸时进出的气：②停止；③休息。

请你帮助他解释“自强不息”的意思。

(限15字以内)答：3.将下面三句话分别填入文中【甲】【乙】【丙】处，正确的一项是（）①苟日新，日日新，又日新②发愤忘食，乐以忘忧，不知老之将至③欲为圣明除弊事，肯将衰朽惜残年A.③②①B.①③②C.③①②D.②①③4.根据语境，下列选项中不属于“他们”行列的一项是（）A.张岱B.范仲淹C.苏轼D.欧阳修【树立榜样学“自强”】三代北斗人始终把党的事业作为最大事业，把国家利益作为最高利益，把民族梦想作为最终梦想，用“献了青春献终身，献了终身献子孙”的家国情怀书写了中国北斗光耀全球的不朽传奇。

2023-2024学年度第一学期九年级9月份限时训练道德与法治试卷一、选择题（共12小题，每小题2分，共24分，每小题只有一个选项最符合题意）1.宪法第45条规定，“中华人民共和国公民在年老、疾病或者丧失劳动能力的情况下，有从国家和社会获得物质帮助的权利”。

这说明A宪法保障公民权利B.宪法规范国家权力运行B.宪法的实施需要加强监督D.宪法是其他法律的立法基础2.《中华人民共和国反电信网络诈骗法》第一条：为了预防、遏制和惩治电信网络诈骗活动，加强反电信网络诈骗工作，保护公民和组织的合法权益，维护社会稳定和国家安全，根据宪法，制定本法。

对此下列说法错误的是①法律保护公民合法权益②违法行为具有严重社会危害性③宪法是其他法律的立法基础④实施电信网络诈骗必需承担相应的刑事责任A.①②B.①③C.②④D.③④3.图示法是表示概念之间关系的直观方法，下列各组概念之间的关系与下图所示关系一致的是A.名誉权与肖像权B.集体经济与国有经济C.行政处罚与罚金D.政治权利与监督权4.近年来，安徽省各地各部门加快建设服务型政府，纷纷举行“行政机关开放日活动”拉近了政府部门与市民的距离，也让市民感受到了新服务、新形象。

这有利于①杜绝贪污腐败行为②公民直接参与管理国家事务③政府依法行政④让权力在阳光下运行A.①②B.①③C.②④D.③④5.近日，某知名网红主播因偷税漏税被高额罚款上了热搜，小安与同学们就此展开讨论。

下列说法正确的是①法律禁止做的坚决不做②任何违法行为都要承担相应的刑事责任③公民要履行依法纳税的权利④行为与后果之间具有一致性A.①②B.②③C.①④D.③④6.在学习“权利和义务”这一内容时，老师引用了“你可以唱歌，但不能在午夜破坏我的美梦”。

下列选项与这一观点意思相符合的是①公民权利和义务是相等的。

②公民要在法律允许的范围内行使权利。

③公民要增强宪法意识。

④公民权利和义务是相统一的。

A.①②③B.①②④C.①③④D.②③④7.从以下相关法律规定中，我们认识到①法律规定了公民权利与义务②我们的生活与法律息息相关③法律保障公民生存权和发展权④我们青少年必须加强立法A.①②③B.①②④C.①③④D.②③④8.下列事例解读正确的是：9.下列关于全国人大职权的解读，正确的共有（）项①十四届全国人大一次会议审议批准了国务院机构改革方案--立法权②十四届全国人大一次会议审议政府工作报告--监督权③十四届全国人大一次会议选举张军为最高人民法院院长--选举权④十四届全国人大一次会议表决通过2023国民经济和社会发展计划--决定权A.一B.二C.三D.四10.2023年5月17日至18日下午，习近平主席在西安同中亚五国元首分别举行会谈。

限时训练9完形填空On a warm Monday, Jenny Neilson bought a sandwich and parked her car under some trees. Rolling down the windows to 41 in fresh air, she settled back to enjoy her lunch. Suddenly she 42 a big bald （秃顶的）man running through the parking lot. Before she came to 43 what would happen, the man was there, shouting through her window. ―Get out!‖Neilson 44 .Pulling open her door, the man seized her 45 the neck and hair, and threw her out of the car onto the ground. She screamed, 46 her purse and the keys.Two reporters of the local newspaper, Robert Bruce and Jeff Jackson, just outside their office building on a 47 , heard the screams and began running.When they 48 Neilson‘s car, the attacker had jumped into the driver‘s seat and was 49 searching for the keys. Bruce opened the door, and he and Jackson dragged the man out. The attacker 50 back. But even in his cornered panic, he was no 51 for the two athletic men.Reggie Miller, a worker of the local newspaper, heard the screams, too. He rushed back to the office to 52 the police, and then ran back with some plastic ropes ——used to tie up newspapers.With his arms 53 tightly behind him, the prisoner looked up and said 54 , ‗I hope you guys feel good about yourselves – you just caught one of the most wanted men.‘ They 55 him and waited for the police.Later, Bruce and Jackson were shocked to learn the man was the 56 carjacker （劫车者）and suspected murderer, whose 57 – but with a full head of hair – had been recently printed in their own newspaper.Neilson considers herself lucky 58 she suffered injuries. She believes the story might have had a 59 ending if those good people had not come to her aid. ‗Unfortunately,‘she says, ‗many people would 60 have done what they did, and that is the real truth.‘41. A. bring B. let C. gather D. send42. A. recognized B. watched C. noticed D. met43.A.realize B. understand C. imagine D. conclude44.A.escaped B. struggled C. refused D. obeyed45.A.by B. around C. with D. on46 A. burying B. forgetting C. offering D. grabbing47 A. trip B. visit C. break D. holiday48 A. started B. stopped C. entered D. reached49 A. carefully B. madly C. disappointedly D. patiently50 A. fought B. turned C. jumped D. shouted51 A. match B. target C. equal D. companion52 A. remind B. phone C. invite D.beg53 A. rolled B. folded C. bent D. tied54 A. angrily B. kindly C. coldly D. warmly55 A. caught B. thanked C. comforted D. ignored56 A. ordinary B. professional C. honest D. outstanding57 A. picture B. background C. character D. story58 A. and B. but C. though D. when59 A. ridiculous B. similar C. strange D. different60 A. sometimes B. never C. often D. forever阅读理解According to the latest research in the United States, men and women talk such different languages that it is like people from two different cultures trying to communicate. Professor Deborah Tanmen of Georgetown University has noticed the difference in the style of boys' and girls' conversations from an early age. She says that little girls' conversation is less definite than boys' and expresses more doubts. Little boys use conversation to establish status with their listeners.These differences continue into adult life, she says. In public conversations, men talk most and interrupt other speakers more. In private conversations, men and women speak in equal amounts ---- although they say things in a different style. Professor Tannen believes that, for women, private talking a way to establish and test intimacy(亲近，亲密). For men, private talking is a way to explore the power structure of a relationship.Teaching is one job where the differences between men's and women's ways of talking show.When a man teaches a woman, says Professor Tannen, he wants to show that he has more knowledge, and hence (因此，所以）more power in conversation. When a womanteaches another woman, however, she is more likely to take a sharing approach and to encourage her student to join in.But Professor Tannen does not believe that women are naturally more helpful. She says women feel they achieve power by being able to help others. Although the research suggests men talk and interrupt people more than women, Professor Tannen says, women actually encourage this to happen because they believe it will lead to more intimacy and help to establish a relationship.Some scientists who are studying speech think that the brain is pre-programmed for language. As we are usually taught to speak by women, it seems likely that the brain must have a sexual bias(倾向性）in its programming, otherwise male speech patterns阅读表达Good sleep is needed for good health. During sleep, your body repairs itself. Your immune system is built up. Don't shortchange yourself of the sleep you need. Here are some of an expert's tips for getting a good night's sleep.1. Make sure your room is dark. Pull down the shades. Let no light of any kind in.2. Before you go to sleep, ask your family not to turn on a light. Light breaks the sleep rhythm. Once broken, it's hard to get the sleep clock running right. As a result, you will not sleep well. You will wake up tired.3. A hot bath just before bed is good. It makes you relax. You are at peace. This starts the desire for sleep.4. During the day, get some exercise. Even a mild program will show good results. How about a good long walk? This will get your body to work. You will find that toward evening you will get that nice, tired feeling. _________________________. Added to5. Here is what to do when you get up. Open the shades or blinds. Let the sun in.suggestions do you know? Write it or them down and say something _____________________________________________________________________41. B 42. C 43.A 44.C 45.A 46.D 47.C 48.D 49.B 50.A51.A 52.B 53.D 54.C 55.D 56.B 57.A 58.C 59.D 60.BACBDBKey:1. Getting a good night‘s sleep2. Don‘t shortchange yourself of the sleep you need.3. Sleep then will come easily4. Drinking hot milk can help us sleeping well. Before sleeping half an hour, drinking hot milk makes us sleep quickly.5. 打开窗帘，让阳光进来。

新教材高中地理新人教版必修第一册：第二章第二节第2课时【A基础培优练】时间：30分钟总分：54分(知识点1：大气热力环流；知识点2：大气的水平运动——风)一、单项选择题(每小题3分，共45分)[知识点1]下图为热力环流示意图。

读图，完成第1～3题。

1．甲、乙、丙、丁四点的气压值高低顺序正确的是( )A．甲＞乙＞丙＞丁B．甲＞乙＞丁＞丙C．丙＞丁＞甲＞乙D．乙＞甲＞丁＞丙2．a、b、c、d四个环节中最先出现的两个环节是( )A．a、b B．b、dD．a、c D．c、d3．产生c运动环节的根本原因是( )A．水平气压梯度B．水平气压梯度力C．丙、丁处的冷热不均D．甲、乙处的冷热不均【答案】1．B 2．B 3．D [解析]第1题，由图可知，近地面乙处空气受热上升，形成低压，甲处空气冷却下沉，形成高压，甲＞乙；高空丙处空气下沉，形成低压，丁处空气上升，形成高压，丁＞丙；同一垂直方向，海拔越高，气压越低，甲＞丙，乙＞丁，因此可判断甲＞乙＞丁＞丙。

第2题，热力环流的形成过程要把握“先垂直、后水平”的运动原理，因此a、b、c、d最先出现的两个环节是b、d。

第3题，c运动环节属于热力环流的一部分，形成的根本原因是地面受热不均。

[知识点1](2023年山东济宁月考)党的二十大报告指出，坚持农业农村优先发展，坚持城乡融合发展，畅通城乡要素流动。

广东顺德青田村是乡村振兴模范，这里仍旧保留着清代古建筑群，房屋整齐排列，形成九条巷道，北高南低直达村前荷花塘，寓意“九龙戏珠”。

如图为等压面示意图。

据此完成第4～6题。

4．白天，荷花塘表面气压高低对应图中的( )A．①B．②C．③D．④5．图中形成了大气热力环流，其运动方向是( )A．①→④B．①→②C．③→②D．④→③6．“九龙戏珠”的建筑布局有利于调节青田村住宅区的小气候，使村内气候宜人，其效果最明显的时间是( )A．冬季的黑夜B．冬季的白天C．夏季的白天D．夏季的黑夜【答案】4．A 5．B 6．C [解析]第4题，白天，荷花塘表面升温慢，相对于房屋温度较低，气流受冷下沉，荷花塘表面气压高，对应图中的①，A项正确。

高三物理选择题限时训练（九）14．2006年美国NBA 全明星赛非常精彩，最后东部队以2分的微弱优势取胜，本次比赛的最佳队员为东部队的詹姆斯，假设他在某次投篮过程中对篮球做功为W ，出手高度为h 1，篮筐距地面高度为h 2，球的质量为m ，不计空气阻力，则篮球进筐时的动能为：（ ）A ．W+mgh1-mgh2；B ．mgh2-mgh1-W ；C ．mgh1+mgh2-W ；D ．W+mgh2-mgh1。

15．A 、B 两导体板平行放置，在t ＝0时将电子从A 板附近由静止释放。

则在A 、B 两板间加上下列哪个电压时，有可能使电子到不了B 板 ：（ ）16．地球的周围存在地磁场，能有效地改变射向地球的宇宙射线的方向，使它们不能到达地面，从而保护地球上的生命。

假设有一束带正电的宇宙射线粒子垂直于地面向赤道射来（如图，地球由西向东转，虚线表示地球自转轴，上方为地理北极），不考虑粒子受到的重力作用，则在地磁场的作用下，粒子在进入地球周围的空间时，其偏转方向以及速度大小的变化情况是：（ ）A ．相对于预定地点向东偏转，速度变大；B ．相对于预定地点向西偏转，速度变大；C ．相对于预定地点向东偏转，速度大小不变；D ．相对于预定地点向西偏转，速度大小不变。

17．两个相同的条形磁铁，放在平板AB 上，磁铁的N 、S 极如图所示。

开始时平板及磁铁皆处于水平位置，且静止不动。

当将AB 沿竖直方向向上或向下平移时，关于磁铁的运动下列说法正确的是（ ）A ．将AB 竖直向下平移（磁铁与平板间始终相互接触）时，两个条形磁铁一定碰在一起B ．将AB 竖直向下平移（磁铁与平板间始终相互接触）时，两个条形磁铁可能碰在一起C ．将AB 竖直向上平移（磁铁与平板间始终相互接触）时，两个条形磁铁一定不能碰在一起D ．将AB 竖直向上平移（磁铁与平板间始终相互接触）时，两个条形磁铁可能碰在一起18．示波器是一种多功能电学仪器，可以在荧光屏上显示出被检测的电压波形。

课后限时训练(九)一、选择题1.如图所示是某厂电话机的生产流程。

依据该流程图，下列说法错误．．的是()A.“手柄装配”和“主机装配”环节是并行的B.为了保证质量，可以在“包装入库”前再加一个“抽样检查”环节C.“修理”后可直接进入“外观检查”环节D.流程图中没有说明外观检查不合格的产品该如何处理C[本题主要考查阅读并理解简洁流程图的力量。

在阅读具体案例的流程图时要留意流程由哪些环节构成、各环节的时序如何排列这两个最重要的问题。

认真观看后，我们发觉C选项中的“修理”环节后是需要再次进行“整机功能测试”。

]2.如图所示是某造纸厂污水处理工艺优化前后的流程图。

关于优化前的流程图，下列说法中不正确．．．的是()A初沉池、生化池、二沉池、气浮环节都会产生污泥B.达标水排放和污泥回收是并行工序C.污泥回收工序在气浮工序之前D.调整池与达标排放之间的工序是串行工序C[本题考查流程图的识读。

依据流程图，初沉池、生化池、二沉池、气浮环节后均需进行污泥回收，因此不能笼统地说污泥回收工序在气浮工序之前，C项符合题意。

]3.如图所示是某企业矿泉水生产工艺流程，关于该流程，下列说法中正确的是()A.纯水箱储水与小桶灌装机灌装是并行工序B.二级反渗透主机过滤与臭氧发生器发生臭氧是串行工序C.石英砂过滤器过滤与活性炭过滤器过滤是串行工序D.提取生产用水和气水混合器杀菌是串行C[本题考查了流程图的识读，对串行、并行工序准时序等的理解。

纯水箱储水与小桶灌装机是串行工序，A项错误；二级反渗透主机与臭氧发生器是并行工序，B项错误；石英砂过滤器过滤与活性炭过滤器过滤是串行工序，C项正确；提取生产用水和气水混合器杀菌是并行工序，D项错误。

]4.如图所示是一款新产品的设计流程图，关于该流程，以下说法中正确的是()A.若方案不行行，则重新进行市场调查B.样品制造和修改是并行环节C.草拟方案和方案论证是串行环节D.评价不满足，则重新草拟方案C[本题考查流程图的识读。

九年级英语限时训练（附参考答案）（满分45分时间25分钟）一、听力（共10小题；每小题1分，满分10分）（一）录音中有五个句子，每个句子听一遍，然后从每小题A、B、C中选出适合每个句子的答语。

（5分）1. A. Qingdao. B. Xi'an. C. Kunming.2. A. At 6:00 p. m. B. At 11:00 p. m. C. At 6:00 a. m.3. A. At home. B. A dictionary. C. When he was ten.4. A. Sorry, I don't. B. Certainly, I could. C. OK, here you are.5. A. Don't do it. B. Me neither. C. Good idea.（二）在录音中你将听到一段短文及五个问题。

根据短文内容及问题选择正确答案。

短文及问题听两遍。

（5分）6.A. 13 years old. B. 14 years old. C. 15 years old.7. A. She likes reading and running.B. She likes painting and jogging.C. She likes dancing and singing.8. A. She thinks it is interesting. B. She thinks it is difficult. C. She thinks it is easy.9. A. She is a math teacher. B. She is a policewoman. C. She is a doctor for children.10. A. Jane works hard at math.B. Jane's aunt asked her to do more exercises.C. Jane got the right answer of the math problem.二、完形填空（共10小题；每小题1分，满分10分）阅读下面短文，掌握其大意，然后从每题所给的A、B、C三个选项中，选出能填入短文相应空白处的最佳选项，并在答题卡上将该项涂黑。

限时训练各环节要求一、听力训练要求听力训练是提高听力水平的重要环节，需要注意以下要求：1. 注意力集中：在听力训练过程中，要保持专注，全神贯注地聆听。

避免分心或走神，以免错过关键信息。

2. 记笔记与标记：可以使用纸笔记录关键信息，如人名、地名、数字等。

也可以在听力材料上做标记，以便后续回答问题。

3. 掌握关键词汇：在听力材料中，会出现一些关键词汇，掌握这些词汇对于理解整个内容非常重要。

可以提前准备这些词汇，以便更好地理解听力材料。

4. 练习听力速度：在日常训练中，可以逐渐提高听力速度。

开始时可以选择较慢的听力材料，逐渐过渡到正常速度的听力材料。

这样可以提高听力反应能力。

二、阅读训练要求阅读训练是提高阅读理解能力的重要环节，需要注意以下要求：1. 熟悉题型：不同题型的阅读理解有不同的解题思路。

在训练过程中，要熟悉各类题型的解题方法，以便更好地完成题目。

2. 词汇积累：阅读理解中经常出现一些生词或难词，掌握这些词汇对于理解文章非常重要。

可以通过背单词、阅读英文材料等途径进行词汇积累。

3. 理解文章结构：阅读理解文章通常有一定的结构，如引言、主体、结论等。

在阅读过程中，要注意把握文章的整体结构，以便更好地理解文章的意思。

4. 时间控制：阅读理解题目往往较多，时间有限。

在训练过程中，要掌握好时间，合理安排解题顺序，避免因时间不足而影响答题效果。

三、写作训练要求写作训练是提高写作能力的重要环节，需要注意以下要求：1. 提纲思维：在写作前，可以先列出写作的提纲，明确文章的结构和内容。

这样可以更好地组织思路，使文章逻辑清晰。

2. 语言表达：在写作过程中，要注意语言的准确性和丰富性。

可以使用各种句型和词汇，使文章更具表达力和可读性。

3. 文章结构：写作要注意文章的结构，包括引言、主体和结论。

可以使用适当的段落和标题，使文章结构清晰，易于阅读。

4. 语法和拼写：写作过程中要注意语法和拼写的准确性。

可以多多练习语法和拼写，以避免错误和歧义。

灵宝实高 2020届高三物理第三次限时训练试题一、选择题：在每小题给出的四个选项中，第1~8题只有一个选项正确；第9~12题有多个选项正确，每小题4分，全部选对的得4分，选对但不全的得2分，有选错的得0分。

1.下列说法正确的是（ ）A.研究“天宫一号”在轨道上的飞行姿态时，“天宫一号”可看作质点B.月亮在云中穿行，是以月亮为参考系C.合外力对物体做功为零，则物体的动能不变D.枪筒里的子弹在扣动扳机火药爆发瞬间仍处于静止状态2.“西电东送”为我国经济社会发展起到了重大的推动作用。

如图是部分输电线路。

由于热胀冷缩，铁塔之间的输电线夏季比冬季要更下垂一些，对输电线和输电塔的受力分析正确的是（ ） A.夏季输电线对输电塔的拉力较大B.夏季与冬季输电线对输电塔的拉力一样大C.夏季与冬季输电塔对地面的压力一样大D.冬季输电塔对地面的压力大3.一项新的研究表明，由于潮汐引力，地球的自转速度在变慢，月球也以每年3.8cm 的速度远离地球，若不考虑其他变化，则在遥远的未来（ ） A.月球绕地球运行的周期将变短 B.月球表面的重力加速度将变大 C.地球的第一宇宙速度将变小 D.地球的同步卫星的高度将变大4.如图所示，某同学用绳子拉木箱，使它从静止开始沿粗糙水平路面运动至某一速度的过程，下列分析正确的是（ ） A.动能的增量等于拉力做的功 B.机械能增量等于拉力做的功C.摩擦产生的热量等于克服摩擦力做的功D.拉力越大该同学做的功越多5.河宽d ，一小船从A 岸到B 岸。

已知船在静水中的速度v 大小不变，航行中船头始终垂直河岸，水流的速度方向与河岸平行，若小船的运动轨迹如图所示，则 A.越接近河岸船的速度越大 B.越接近河岸水的流速越小 C.各处水的流速相同 D.船渡河所用的时间小于d t v=6．一辆质量为m 的汽车在平直公路上，以恒定功率P 行驶，经过时间t ，运动距离为s ，速度从v 1增加到v 2，已知所受阻力大小恒为f ，则下列表达式正确的是( ) A ．s ＝v 1＋v 22t B ．P ＝fv 1 C.P v 1－P v 2＝m (v 2－v 1)t D ．Pt －fs ＝12mv 22－12mv 21 7.如图所示，用三根细线a b c 、、将两个小球1和2悬挂起来，静止在竖直面内，已知两球重力均为G ，细线a 与竖直方向的夹角为30°，细线c 水平。

九年级英语限时训练（附参考答案）（满分30分时间30分钟）一．根据句意及首字母和汉语提示，完成句子。

（每小题2分，共10分）1. The man was d________ out of the club because of breaking the rule.2. As they were out of work, Mr and Mrs Black had to turn to their r________for help.3. Almost all the animals have their special ways to protect themselves from their e________.4. On rainy days, I have n________to go. So I have no choice but to stay at home and watch TV.5. Their b________ towards me shows that they do not like me at all.二．阅读理解（每小题2分，共10分）Reduce schoolwork burden(负担)on primary and junior high school students. The policy calls for reducing homework and after-school classes. According to the policy, children below the third grade will not have homework anymore. It In July, China introduced the “double reduction (双减)” policy. It hopes to should take no more than 90 minutes for junior high school students to finish their homework. After-school training institutions are not allowed to offer extra education courses or advanced(超前的)teaching on weekends, holidays or during winter and summer vacations. One month has passed since the new semester began. How do students feel about this new policy?“Our homework is clearly less than before,” said 13-year-old Shen Yuzhe from Beijing. “We are not encouraged to buy wor kbooks anymore. The exercises are mainly from the textbook.”According to Shen, students have enough time to process new knowledge now. “Our teachers are also giving us more chances to do experiments and learn from real life,” said Shen. “For example, we went to research earthworms(蚯蚓)in a field during a biology class. This is a much better way to learn things than just hitting the books.”For 13-year-old Zhang Hangming from Tianjin, the best thing about “double reduction” is the increased time in after-sc hool activities. “We can now spend more time taking part in clubs and activities, such as dancing, volleyball and drama. I have joined a group called “leadership development” where I can learn all kinds of skills beyond schoolwork,” said Zhang.Both Shen a nd Zhang find there are fewer exams now. But they think it’s not necessarily a good thing. “Exams push me to study harder. Each exam shows my progress as well as my weak points,” Zhang said.Shen also pointed out that when burden is lightened, self-discipline(自律) becomes the key. “Some students now spend more time having fun when homework is finished early. But if you use all the free time to relax, you might fall behind other students,” he said. “6. The “double reduction(双减)” policy aims to ________.A. make vacations longer for studentsB. reduce the pressure put on teachersC. reduce students’ schoolwork burdenD. help students become more competitive7. Which of the following is TRUE about the policy?A. Homework is not allowed for primary students.B. Junior high schools should reduce their homework.C. All after-school training institutions are asked to close.D. After-school training institutions should offer advanced teaching.8. According to the “double reduction(双减)” policy, what kind of after-school classes CANNOT students take during vacations?A. Sports.B. Math.C. Public speaking.D. Computer programming.9. Which of the following is NOT true about Shen Yuzhe and Zhang Hangming?A. They have less homework and fewer exams now.B. They can spend more time in after-school activities.C. They think the best thing is to have fewer exams now.D. They have more chances to learn knowledge from real life.10. What do Shen and Zhang mainly want to tell us in the last two paragraphs?A. Students should learn to be self-discipline.B. Students should use all the free time to relax.C. Exams aren’t necessary because they only show students’ weak points.D. Students should spend more time having fun after finishing homework.三．阅读表达。

九年级十二月份限时作业训练英语试题（本试卷共45道题满分90分考试时间90分钟）考生注意：所有试题必须在答题卡指定区域内作答，在本试卷上作答无效第一部分选择题（共50分）一、阅读理解（共20小题，每小题2分；满分40分）第一节阅读下面语言材料，从每题所给的A、B、C、D四个选项中选出最佳选项。

AWe all want to change something about our appearance（外表）.Sometimes it＇s healthy.sometimes it's not so hcalthy. Here are four kids' questions about this topic.JackI don't really have the best fashion sense in the world. I see my friends wearing good clothes, and mine are OK. It's not that I want to be like them,I just want to be in the same fashion zone（区域）.Any advice？TomI am really tall for my age. But almost everyone I know is shorter than me and can do everything better. That's because I weigh more than others.It makes me feel fat. I am only 13! Can you help me?LilyI have a "beauty mark" (as my parents call it) on the right part of my face, and some people say I look beautiful, but I'm starting to doubt if it's true.Sometimes people who are too judgmental（品头论足）make fun ofme and call me “moley” or “mole face" and it really hurts my feelings. Sometimes I even come home crying. How do l just brush it off?RitaI’m kind of worried about wearing make-up（化妆品）.I think that make-up could maybe improve my appearance. However,I don't want to overdo it. Sometimes girls get bad words because they wear too much all the time, and they also look a bit silly. I don't want people to think that I'm uncomfortable in my shoes. Can you give me uny advice about how to wear?1. The four students are talking about theirA.FriendshipB.HealthC.FashionD. Appearance九年英语第1页共8页2. What do we know about the four studcnts according to the text?A. Jack wants to be more popular than others.B. Tom thinks he is overweight for his agc.C. Lily hates to brush off her "beauty mark".D. Rita likes to wcar make-up all the time.3.What kind of feeling do these four students have in common?A.Worry.B.Anger.C. Happiness.D. Excitement.4.Where is the text most likely from?A.A poster. B A magazinc. C.An ad. D.A reportBIn the coastal city of Laguna in Brazil, there is a special fishing team. It is made up of human fishers and dolphins! They work together to catch the fish - mullet, which is also dolphins'favourite food.Mauricio Cantor from Oregon State University said "The dolphins are really good at finding fish in the dirty water and herding（驱赶）them to the coast，and the fishermen are really good at catching the fish with their nets."Cantor's study described how fishermen and dolphins give signals to each other during fishing.When dolphins find fish，they herd them to the coast. Then they arch（拱起）their backs in front of the fishermen to tell them to throw nets. Fishermen will then throw the nets right away, or they may lose the best chance. Once the fish are caught in the nets, dolphins can move in and get some for themselves.Fishermen nced to be well-trained to understand the signals from dolphins, said Cantor. The study found that fishermen are 17 times more likely to catch fish by working with dolphins. At the same time，cooperative dolphins have 13 percent higher survival rates （存活率）than other dolphins．Human-animal partnerships aren't common throughout history because humans may get hurt by animals. But they also “give us an idea of how positive our human interactions can be with nature."said Bruno Diaz Lopez from Dolphin research institute in Spain.5.What can we leam from Pragraph1?A.Fishers feed dolphins with mullets.B. Dolphins only catch mullets for food.C. Dolphins help fishers catch mullets.D.Fishers swim with dolphins along the coast.6.What is the right order of the fishing team?A.①②④③B.②①④③C.①④②③D.②④③①第2页共8页7. If fishers and dolphins work together,_________A. dolphins have 13% more food than usualB. fishers will train dolphins bettcrC. fishers arc safer to fish on the seaD. dolphins bave better chances to surviveS.The writer uses the cxample about dolphins and fishermen to show thatA. humans can get on well with naturcB. humans may gct hurt by animalsC. humans only have good relationships with dolphinsD. humans can't catch mullet without dolphinsC①Bad things happen to many of us. Something makes you sad, angry, frustrated or disappointed But you still have to get up and go to work. Everything others say to you sounds stupid. Everyone seems to annoy you from time to time. Luckily, you can do something about it. Here are some ways to turn around a bad day.②Accepting that you're in a bad mood is not that hard. If you're mad,be mad.If you are sad. be sad. This does not give you license to be rude and unpleasant to others. It just means that you need to recognize and accept your bad mood to be able to do somcthing.③You can try to keep your bad mood a secret and put on your happy mask. But guess what!You're fooling nobody around you but yourself. The best thing to do is to tell the people you work closely with what is happening to you. Just simply tell them “Listen, I'm in a really bad mood today.Гm not sure why, but it has nothing to do with you. IfI bite your head off. I say sorry in advance."④Spend a few moments trying thinking of at least oneor two things that aren't all bad:Something that you look forward to, such as a person you like at work or something nice that happened recently.⑤Take some quiet time. Have a walk in your lunch break. Sit and work somewhere peaceful alone. Take a relaxing long bathroom break. Consider going home early or taking the day off.9. If you're in a bad mood,you should.A.be rudeB. be unhappyC. accept itD.be angry10. The underlined phrase "bite your head off' mcansA.make your head hurtB.am mad at youC.can't understand youD.am pleased with you11.What's the structure of this passage?12. The passage mainly tells usA. how to get used to a bad moodB. how to deal with your bad moodC. everyone has bad daysD. bad days are not bad九年英语第3页共8页DWarming tempcratures and shorter winters might sound like the end of snow days. However,rising tempcratures may actually cause snowstorms to dump （降下）more snow，says David Robinson.He is a professor at a university in New Jersey. He studics climate changc.Temperature change is onc of the grcatest in Earth's climate change over a long period of time. It can happcn naturally or becausc of human activitics, such as burning gas and coal. Burning these fuels produces carbon dioxide （二氧化碳）and other pollutants into the atmosphere，which hold heat in the atmosphcre, leading to warmer global tempcratures over time.But how could warme temperatures lead to more snow？To get snow，you need moisture（水汽）and freezing temperaturcs (0℃or lcss), says Robinson. Without moisture in the air, there is no precipitation (rain or snow). Robinson says there arc signs that snowstorms are becoming stronger.This is because of this connection bctween moisture and precipitation.“The warmer the air becomes, the more moisture it holds. So, if it's warming and still cold enough to snow, you can get more snow," Robinson says.Of the 10 biggest snowfalls in D. C. region, five happened in the past 25 years, according to the NWS. During that same time period, average winter temperatures in D. C. increased. In 1996, the avcrage winter temperature was 1.8°C. In 2020, it was 6C.Weather experts suggest that rising temperatures may make winter shorter and less cold. But for now, the snow is still falling. One day, winter might not have any days below the freezing temperature.Once temperatures stay above freezing, snowstorms become rain. Until then, we might continue to see strong storms.According to Robinson, that time could come sooner than we think. He says,“When we look back, years from now, we may see that this was the breaking point.”13. What will the warming temperatures cause according to the text?A.Less coal.B.Drier weather.C.Longer winters.D. Stronger snowstorms.14. What is paragraph 2 mainly about?A.How Earth's climate changes.B.What causes rising temperatures.C What produces carbon dioxide. D.How pollution influences climate.、15.What does it need to get snow according to the text?a. moistureb.rainstormc.dioxided.freezing temperatureA.adB.abC.bcD.cd16. What is the purpose of paragraph '5?A. To introduce D.C.B. To report the biggest 10 snowstorms.C. To support Robinson's ideas.D.To show the increase of temperatures.第二节阅读短文，从方框中所给的选项中选出可以填入空白处的最佳选项，其中有一个多余的选项。

限时训练选题细目表1．(2017·贵州七校联考)下列能说明细胞已发生分化的依据是（）A．细胞中有胰岛素的mRNAB．缺氧条件下进行无氧呼吸C．具有天花病毒抗体的基因D．RNA聚合酶结合到DNA上解析:本题考查细胞分化的实质，意在考查考生在理解和分析方面的能力,难度较小.细胞分化的实质是基因的选择性表达。

人体的各种组织细胞中都含有胰岛素基因，但只有胰岛B细胞中的胰岛素基因才能表达形成胰岛素的mRNA和胰岛素，因此，细胞中有胰岛素的mRNA说明细胞已发生分化。

答案：A2．(2015·海南卷）关于人体造血干细胞的叙述,错误的是( ) A．造血干细胞与成熟红细胞中的酶存在差异B．造血干细胞分化为成熟红细胞的过程是可逆的C．健康成年人的造血干细胞主要存在于其骨髓中D．造血干细胞分化形成的红细胞和白细胞寿命不同解析:造血干细胞与成熟红细胞中的酶存在差异,是基因选择性表达的结果，A正确；哺乳动物成熟红细胞没有细胞核与各种细胞器,造血干细胞分化为成熟红细胞的过程是不可逆的,B错误;健康成年人的造血干细胞主要存在于其骨髓中，C正确；造血干细胞分化形成的红细胞和白细胞寿命不同，是细胞分化的结果，D正确。

答案：B3．（2016·云南一模）下图表示同一个体的5种细胞中5种基因的表达情况,下列分析错误的是（)A．此图能说明细胞分化的实质B．基因B可能控制RNA聚合酶的合成C．细胞中mRNA差异最大的是细胞2和4D．一般来说，这5种细胞的核遗传物质相同解析：本题考查细胞分化，意在考查考生在理解和获取信息方面的能力，难度中等。

题图显示,同一个体的5种细胞中基因表达的情况有差异,说明基因在不同细胞中选择性表达,体现了细胞分化的实质；5种细胞中都有相关基因表达,基因表达的转录过程中有RNA 聚合酶参与，说明5种细胞中都有RNA聚合酶，基因B在5种细胞中都表达了，故其可能是控制RNA聚合酶合成的基因；细胞2和4中mRNA有2种不同,而3和4中mRNA有4种不同；5种细胞均最终来源于同一受精卵，故它们细胞核中的遗传物质通常相同。

第15讲基因的自由组合定律限时训练提升考能(时间：30分钟)一、选择题1.(2016·安徽1号卷)小麦籽粒色泽由4对独立存在的基因(A和a、B 和b、C和c、D和d)所控制，只要有一个显性基因存在就表现红色，只有全隐性才为白色。

现有杂交实验：红粒×红粒→63红粒∶1白粒，则其双亲基因型不可能的是()A.AabbCcDd×AabbCcDdB.AaBbCcDd×AaBbccddC.AaBbCcDd×aaBbCcddD.AaBbccdd×aaBbCcDd解析由白粒占1/64＝(1/4)3，可推出四对等位基因中，出现三对双杂合、一对全为隐性(如选项A)或两对双杂合、两对测交组合(如选项B和C)。

答案 D2.(2016·哈三中期中)水稻的有芒(A)对无芒(a)为显性，抗病(B)对感病(b)为显性，这两对遗传因子自由组合。

现有纯合有芒感病株与纯合无芒抗病株杂交，得到F1，再将此F1与杂合的无芒抗病株杂交，子代的四种表现型为有芒抗病、有芒感病、无芒抗病、无芒感病，其比例依次为()A.9∶3∶3∶1B.3∶1∶3∶1C.1∶1∶1∶1D.1∶3∶1∶3解析 根据题意AAbb(有芒感病)××aaBB(无芒抗病)→F 1：AaBb(无芒抗病)×aaBb(无芒抗病)→AaB_(有芒抗病)∶Aabb(有芒感病)∶aaB_(无芒抗病)∶aabb(无芒感病)＝3∶1∶3∶1。

答案 B3.高茎(T)腋生花(A)的豌豆与高茎(T)顶生花(a)的豌豆杂交(两对等位基因分别位于两对同源染色体上)，F 1的表现型及比例为高茎腋生花∶高茎顶生花∶矮茎腋生花∶矮茎顶生花＝3∶3∶1∶1。

下列说法正确的是( )①亲代基因型为TtAa ×Ttaa ②高茎与腋生花互为相对性状③F 1中两对基因均为纯合子的概率为14 ④F 1中两对性状均为隐性的概率为18 ⑤F 1中高茎腋生花的基因型可能为TTAAA.①②③B.②③⑤C.①③④D.③④⑤解析 亲代杂交，子代中高茎∶矮茎＝3∶1，则双亲基因型为Tt ×Tt ；腋生花∶顶生花＝1∶1，则双亲基因型为Aa ×aa ，故双亲的基因型为TtAa ×Ttaa 。

高考数学客观题限时训练习题（十一套）高考数学客观题限时训练一班级 姓名 学号 记分1、已知集合{}{}|12,|35A x a x a B x x =-≤≤+=<<，则能使A B ⊇成立的实数a 的取值范围是（ ）A ．{}|34a a <≤B ．{}|34a a <<C ．{}|34a a ≤≤D ．∅ 2、等比数列{}n a 中，0n a >且21431,9a a a a =-=-，则45a a +等于（ ） A ．16 B ．27 C ．36 D ．27- 3、不等式2103x x -≤的解集为（ ）A ．{|2x x ≤≤ B ．{}|25x x -≤≤ C ．{}|25x x ≤≤ D ．{}5x x ≤ 4、曲线24y x =关于直线2x =对称的曲线方程是（ ）A ．2164y x =-B ．284y x =-C ．248y x =-D ．2416y x =-5、已知()321233y x bx b x =++++是R 上的单调增函数，则b 的范围（ ）A ．1b <-或2b >B ．1b ≤-或2b ≥C ．12b -<<D ．12b -≤≤6、直线l 是双曲线()222210,0x y a b a b-=>>的右准线，以原点为圆心且过双曲线的焦点的圆被直线l 分成弧长为21∶的两段圆弧，则该双曲线的离心率是（ ）A B C D7、空间四点A B C D 、、、，若直线,,AB CD AC BD AD BC ⊥⊥⊥同时成立，则A B C D 、、、四点的位置关系是（ ）A ．一定共面B ．一定不共面C ．不一定共面D ．这样的四点不存在8、()f x 是定义在R 上的奇函数，它的最小正周期为T ，则2T f ⎛⎫- ⎪⎝⎭的值为（ ）A ．0B ．2TC ．TD ．2T-9、已知实数x y 、满足22326x y +=，则2x y +的最大值为（ ） A ．4 BC． D10、函数222x y e -=的图象大致是（ ）选择题答案栏11、直线20x y m ++=按向量()1,2a =--平移后与圆22:240C x y x y ++-=相切，则实数m 的值为____________.12、在()()10211x x x ++-的展开式中，4x 项的系数是_______________.13、12名同学分别到三个不同的路口进行车流量的调查，若每个路口4人，则不同的分配方案共有____________14、函数()f x =是奇函数的充要条件是____________ABCD15、260100x y x x y +-≤⎧⎪+≥⎨⎪-≤⎩,z mx y =+取得最大值的最优解有无数个，则m 等于16、在下列四个命题中，①函数2cos sin y x x =+的最小值是1-。

限时训练的概念限时训练是指在一定时间内进行系统性、高强度的训练，以达到快速提升技能水平或达到一定目标的训练方法。

它的概念可以应用于各个领域，包括体育运动、学术研究、职业培训等。

在限时训练中，时间起到了一个重要的作用，既是一种压力源，也是一种提高效率的手段。

通过限时训练，可以有效地激发个体潜能，加强对自身能力的认识，并提高工作效率和个人能力。

限时训练的优势之一是提高效率。

在有限的时间内，个体需要集中注意力和精力，抓住关键点，以快速完成任务。

相对于没有时间限制的训练，限时训练可以有效地避免拖延症的产生，强迫个体专注于任务。

通过高强度的训练，个体在有限时间内集中精力，可以在短时间内快速提升技能水平，达到预定目标。

例如，在运动训练中，运动员经常进行限时训练，通过竞技比赛、训练赛等方式，限制比赛时间，强迫运动员在短时间内全力以赴，加快提高技能和战术水平的进程。

限时训练还有助于个体的挑战与成长。

在有限的时间内，个体需要面对更多的压力和困难，同时也有更多的机会去尝试和实践。

这种挑战能激发个体内在的潜能，推动个体克服困难，不断突破自己的极限。

在体育运动中，比赛常常有时间限制，运动员必须在规定时间内尽快完成比赛任务，这要求运动员在有限时间内高效运动、制定战术，并展示自身的技能和能力。

正是因为时间限制的存在，运动员能够更好地调整心态，学会应对压力和逆境。

此外，限时训练还有助于个体的自律和时间管理能力的培养。

限时训练要求个体合理分配时间，设定目标，制定计划，并严格按照计划执行。

个体需要通过时间管理，将有限的时间合理安排，使每一个环节都能得到充分利用。

同时，限时训练还能让个体养成良好的时间意识，提高个体对时间的敏感度和把控能力，使个体能够更好地制定目标、规划未来，并有效管理时间，提高工作效率。

然而，限时训练也存在一些挑战和不足之处。

首先，有限的时间会带来更大的压力和紧迫感，对一些个体来说，压力过大可能导致焦虑等负面情绪的产生，从而影响个体的学习和表现。