限时训练(1)
限时训练1
高三物理限时训练一班别_______________ 姓名_________________ 座号____________________ 1. 下列关于速度的说法正确的是： ( )A ．速度是描述物体位置变化的物理量B ．速度方向就是物体运动的方向C ．位移方向和速度方向一定相同D ．平均速度的大小就是平均速率2．某人爬山，从山脚爬上山顶，然后又从原路返回到山脚，上山的平均速率为v 1，下山的平均速率为v 2，则往返的平均速度的大小和平均速率是( )A.v 1＋v 22， v 1＋v 22B.v 1－v 22， v 1－v 22C ．0，v 1－v 2v 1＋v 2 D ．0， 2v 1v 2v 1＋v 23．一艘船以恒定的速率，往返于上、下游两码头之间．如果以时间t 1和t 2分别表示水的流速较小和较大时船往返一次所需的时间，那么，两时间的长短关系为( )A ．t 1＝t 2B ．t 1>t 2C ．t 1<t 2D ．条件不足，不能判断4．下表是四种交通工具的速度改变情况，下列说法正确的是( )A.C ．③的速度变化最快 D ．④的末速度最大，但加速度最小 5.一个质点做运动方向不变的直线运动，加速度的方向始终与速度方向相同，但加速度的大小逐渐减小直至为零，在此过程中( )A.速度逐渐减小，当加速度减小到零时，速度达到最小B.速度逐渐增大，当加速度减小到零时，速度达到最大C.位移逐渐增大，当加速度减小到零时，位移将不再增加D.位移逐渐减小，当减速度减小到零时，位移达到最小6．一物体做匀变速直线运动，初速度为15 m/s ，方向向东，第5 s 末的速度为10m/s ，方向向西，则第几秒开始物体向西运动（ ）A ．第2sB ．第4sC ．第9sD ．第15s7． 2008年9月25日晚21点10分，我国在九泉卫星发射中心将我国自行研制的“神舟7号”宇宙飞船成功地送上太空，飞船绕地球飞行一圈时间为90分钟．则( )A ．“21点10分”和“90分钟”前者表示“时刻”后者表示“时间”B ．卫星绕地球飞行一圈，它的位移和路程都为零C ．卫星绕地球飞行一圈平均速度为零，但它在每一时刻的瞬时速度都不为零D ．地面卫星控制中心在对飞船进行飞行姿态调整时可以将飞船看作质点8.一质点做匀加速直线运动，第三秒内的位移2m，第四秒内的位移是2.5m，以下说法中正确的是（）A．这两秒内平均速度是2.25m/s B．第三秒末即时速度是2.50m/sC．质点的加速度是0.125m/s2 D．质点的加速度是0.5m/s29. 一辆汽车从原点O由静止出发沿x轴做直线运动，为研究汽车的运动而记下它的各时刻(1)(3)汽车在第4秒内的平均速度为多大？10．一辆汽车沿平直公路从甲站开往乙站，起动加速度为2m/s2，加速行驶5秒，后匀速行驶2分钟，然后刹车，滑行50m，正好到达乙站，求汽车从甲站到乙站的平均速度？解析：(1)v 2＝3m/s (2)a ＝Δv ＝4－23－1m/s 2＝1m/s 2(3)Δx 4＝3.5m ，t ＝1s ，v 4＝Δx 4t 4＝3.5m/s.解析：起动阶段行驶位移为： s 1=2121at ……（1） 匀速行驶的速度为： v = at 1 ……（2） 匀速行驶的位移为： s 2 =vt 2 ……（3） 刹车段的时间为： s 3 =32t v……（4） 汽车从甲站到乙站的平均速度为：v =s m s m s m t t t s s s /44.9/1351275/10120550120025321321==++++=++++。
2020高考英语江苏专用版考前冲刺5周限时练辑：限时训练(一) Word版含解析
限时训练(一)Ⅰ.单项填空1.Without the wise leadership of the Party，it hard to achieve the GDP growth target for 2022.A.would have beenB.would beC.wereD.had been答案 B解析考查虚拟语气。
句意为：要是没有党的英明领导，很难实现2022年国内生产总值增长的目标。
此处without短语相当于虚拟条件句，根据题干中的“2022”判断是对将来的虚拟，主句用would＋do的形式，故B项正确。
2.Parents’top priority is to help their kids develop the ability to show in their choices of friends.binationB.admirationC.inspirationD.discrimination答案 D解析考查名词词义辨析。
combination结合；admiration钦佩；inspiration灵感；discrimination 区别，识别。
句意为：父母的首要任务是帮助他们的孩子发展在选择朋友时的识别能力。
根据句意可知D项正确。
3.As Emerson puts it，we travel the world over to find the beautiful，we must carry it with us or we find it not.A.unlessB.untilC.thoughD.because答案 C解析考查连词词义辨析。
句意为：如爱默生所言，我们环游世界是为了寻找美，但是我们必须与美同行才能发现它。
unless除非；until直到；though尽管；because因为。
根据句意可知，这里表示一种让步关系，故选C。
4.I felt like giving up.I probably ，but my Dad whispered，“Come on! You can make it.”A.would haveB.wouldC.shouldD.should have答案 A解析考查过去将来时。
直线运动 限时训练1
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。
限时训练(一)字音(第二课时)
限时训练(一)字音(第二课时)1．下列词语中加点的字，每对读音完全相同的一组是( )A．.笼．罩／笼．络弄．堂／舞丈弄．墨答．谢／一问一答．B．慰藉．／狼藉．收拾．／拾．级而上渐．染／东渐．于海C．丧．礼／丧．胆兴．奋／夙兴．夜寐悄．寂／悄．声细语D．泥．墙／拘泥．散．布／烟消云散．省．亲／不省．人事答案：D答题指要：泥(nì)，散(sàn)，省(xǐng)。
A．弄(lîng)堂／舞文弄(nîng)墨；B．慰藉(jiâ)／狼藉(jí)，收拾(shí)／拾(shâ)级而上；C．丧(sāng)礼／丧(sàng)胆。
2．下列各组词语中加点的字是多音字，其中有两种读音的一组是（）A．宁．愿宁．缺毋滥宁．死不屈宁．折不弯宁．为玉碎B．间．谍挑拨离间．亲密无间．黑白相间．间．接经验C．匀称．称．心如意称．孤道寡啧啧称．奇拍手称．快D．面相．相．机行事相．貌堂堂吉人天相．相．时而动答案：C答题指要：C “称心如意”“匀称”中的“称”读chân，其它读chēng；A、n ìng；B、jiàn； D、xiàng。
3．下列词语中加点的字，每对的读音完全相同的一组是（）A．徇．私/驯．熟咆哮．/肖．像惬．意/提挈．连咳．带喘/金蝉脱壳．B．偈．语/鲫．鱼畏葸．/玉玺．胴．体/栋．梁耆．年硕德/骐．骥一跃C．投奔．/奔．命着．急/着．火给．养/给．以强．词夺理/强．人所难D．丧．气/沮丧．殷．实/殷．红反省．/省．悟罪不当．罚/独当．一面答案：B答题指要：A、“徇”、“驯”读xùn；“哮”、“肖”读xiāo；“惬”、“挈”读qiâ；“咳”读kã；“壳”读qiào。
B、“偈”、“鲫”读jì；“葸”、“玺”读xǐ；“胴”、“栋”读dîng；“耆”、“骐”读qí；C、“奔”读bân；“给”分别jǐ、gěi；“着”读zháo；“强”读qiǎng。
中考数学选择填空限时训练(一)
)E Al)( )DL B T C Mx)A. (2 , 3) B5 •把不等式组8已知关于 该抛物线上的是（ B10 .如图 X 1 - 7 A. 4 B . 6 C . 8 D . 10(0 , 3) C . ( -1 , 3) D . ( -3, 3)图 X 1- 4匀速运动，终点为 C,过运动路线上任意一点 P 作PMLx 轴于M PNLy 轴于N,设四边形OMP 的面积为S, P 点运动的时间为 于t 的函数图象大致是B图 X 1-6图 X 1- 5( )则AE 的长为（( )图 X 1- 7正方形ABCD 勺边长为6,点E,7.如图X 1-4，在?ABC ［中，用直尺和圆规作/ BAD 勺平分线AG 交BC 于点E 若BF = 6, AB= 5A. 10 B . 3 C . 4 D . 5t ，则S 关-io-i B 图 X 1-3A. 0 B . 1 C. .2 D . 2 x> — 1 ,的解表示在数轴上，下列选项正确的是x + 2<36•在Rt △ ABC 中，两直角边的长分别为 6和8,则其斜边上的中线长为 A. 2 ,10 B . 3k9•如图X 1 -5,已知AB 是反比例函数y = x （k >0,x >0）图象上的两点，BC" x 轴，交y 轴于点C 动点P 从坐标原点0出发，沿 x 的方程ax + b = 0（a ^0）的解为x =- 2,点（1 , 3）是抛物线y =ax 2 + bx + c （a ^0）上的一个点，则下列四个点中一定在）6590000人次.将6590000用科学 D . 6.59 X 10 65 C. | ■ 10 D. 10 52. 如图X 1- 1，下面几何体的俯视图是（3. 据统计，2015年广州地铁日均客运量约为 记数法表示为（ ）A . 6.59 X 104 B . 659 X 1044•已知一组数据0，— 1, 1 , 2, 3，则这组数据的方差为（ A.2 B . - 2 C . 2 D . - 1C . 65.9 X 105 F 分另U 在AB AD 上，若CE= 3砺，且/ EC = 45°, _则CF 的长为（选择填空限时训练（一）（限时30分钟 满分54分） -、选择题（本题共10小题，每小题3分，共30分）1 .-2的相反数是（）二、填空题（本题有6小题，每小题4分，共24分）11 •请写出一个解为x= 1的一元一次方程： ________12 .如图X1 - 8是一个斜体的“土”字，AB// CD已知/ 1 = 75°,则/2= ____________图X1- 813 •为了了解某毕业班学生的睡眠时间情况，小红随机调查了该班15名同学，结果如下表:每天睡眠时间（单位：小时）77.588.59人数24531则这1514. 如图X1 -9,将弧长为6 n的扇形纸片AOB S成圆锥形纸帽，使扇形的两条半径0A与0B重合（粘连部分忽略不计），则圆锥形纸帽的底面圆半径是 _________ .a b15. 如图X1 -10,已知点B D在反比例函数y=-（a>0）的图象上，点A, C在反比例函数y = -（b<0）的图象上，AB// CD// x轴，ABX —AB= 4, CD= 3, AB与CD间的距离为1，贝U a- b的值是 ______16. _______________________________________________________________________________ 如图X1 - 11，点A（2 , 0），以0A为半径在第一象限内作圆弧AB使/ A0= 60°,点C为弧AB的中点，D为半径0A上一动点（不与点0 A重合），点A关于直线CD的对称点为E若点E落在半径0A上,则点E的坐标为______________________________________________________________ ;若点E落在半径0B上，则点E的坐标为_________ .计算：1| 3-2| + 20170-( -3) -1+ 3tan30 ° +8.CD在—轴的同侧,图X1- 10参考答案1. C 2.A 3.D 4.D 5.B6. D7.C8.D9.B 10.A11.x - 1 = 0(答案不唯一)12.10513. 8 8 14.3 15.1216. (2 3 - 2, 0) (.3 - 1, 3 - 3)加加练解：原式=2- .3+ 1 -( -3) +3X。
地理限时训练(一)【建议时间15分钟】
地理限时训练（一）【建议时间15分钟】
使用日期：选题：张毅老师批阅人：得分：姓名： 1.
读“地质构造示意图”，完成下列问题。
（14分）
（1）从地质构造上看属于向斜的字母是，属于地堑的字母是。
（2）出现图中“背斜成谷，向斜成山”这一地形倒置现象是受到（内力/外力）作用；
关于这一现象叙述正确的是。
（双选）
①向斜槽部受挤压力的作用岩层坚实不易侵蚀形成的山地
②背斜槽部受挤压力的作用岩层坚实不易侵蚀形成的谷地
③向斜顶部受张力的作用岩层脆弱受外力侵蚀形成的山地
④背斜顶部受张力的作用岩层脆弱受外力侵蚀形成的谷地
（3）若开采地下水，最好在处；若为开采方便，采石场最好选择处（填字母）。
2.读六大板块示意图，完成下列问题。
（16分）
（1）图中表示美洲板块的是（序号）；⑥表示的板块名称是（名称）；
（2）日本群岛是_____板块（序号）和_____板块（序号）（张裂/挤压）形成的，其位于板块的______（生长/消亡）边界附近，地壳较为活跃，故其多、等地质灾害。
注：本次测验选自于2014年重庆一中高2017级高一上期第三次定时练习（2014.12）背诵要点收获：
地理限时训练（一）【参考答案】
1.
2.(每空2分，共16分)
(1) ______⑤__ ____，南极洲板块。
(2) _______①______，_____②________，_____挤压______，
_____消亡__ ___，_____火山______，_____地震______
（注：第2小题：1和2、5和6答题顺序可互换）。
2021届江苏省常州市金沙高级中学高三下学期限时训练(一)英语试题(解析版)
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。
高一上学期语文 限时训练 一含答案
高一语文第一次限时训练一、客观题1．下列词语中加点字的读音，完全正确的一项是（）A．彷（páng）徨青荇（xìng）遒劲（jìn）颓圮（qǐ）B．长篙（gāo）漫溯（sù）青苔（tāi）火钵（bō）C．愤懑（mǎn）冰屑（xuè）麦糟（zāo）叱（chì）骂D．袒露（lù）隽（juàn）永碣（jié）石忸怩（ní）2．下列词语中，没有错别字的一组是（）A．凄婉漂泊褒扬击浊扬清B．斑斓笙萧抨击剑拔驽张C．榆阴气概瓦菲意气风发D．讴歌扭扣寥廓天伦之乐3．下列句子中，成语使用恰当的一句是（）A．袁弘表示，世上没有天生或是一蹴而就的坏人，自己会在饰演的这一版本的杨康中加深刻画其心理变化的过程，将其内心的迷茫和矛盾展现出来。
B．中日双方首脑同时以更加明确清晰的语言表示，解决东海共同开发问题倚马可待，现在剩下的可能就是技术层面或者事务层面的问题了。
C．日本捕鲸者不顾国际社会谴责，把非法捕捉到的鲸鱼屠宰、清洗、销售，以牟取暴利，血腥的一幕令人惨不忍睹。
D．房地产市场对宏观调控“免疫”，更深层的原因是市场制度存在重大的制度缺陷，若不从制度改革入手釜底抽薪，恐怕再多的“组合拳”和“重拳”都难以“拳拳到肉”。
4．下列各句中，没有语病的一句是（）A．由于这种思想上的局限性，使得韩愈的文体改革运动仅仅以模仿先秦诸子的散文为目标，而不能像先秦诸子和司马迁那样以接近人民口语为目标来创造新的散文。
B．这种如鱼得水似的悠闲，让后世的学者在感叹中国人融入西方社会的艰难时，不得不叹服徐志摩是“最适应西方生活的中国文人”。
C．在这一时期，毛泽东同志在长沙组织了湖南学生联合会、新民学会，开办了平民夜校、文化书社和湖南自修大学，参加了反对袁世凯称帝，领导了驱逐张敬尧等军阀。
D．行政处罚在程序上的公正、合理与否，将直接影响行政处罚的内容的有效和成立。
高三英语晚自习限时训练 (1)
高三英语晚自习限时训练【3月31日晚限制：不超过65-70分钟】一、六选四阅读1. Complete the following passage by using the sentences given below. Each sentences can be used only once. Note that there are two more sentences than you need.Can just one person make a difference? You bet! In a community every person counts, and getting involved is not difficult. Take stock of your own talents and interests. Don't wait for someone else to act first. Take the initiative! Once you see what you can accomplish, you'll want to keep going.Here are just a few ways to make a difference in your community. How many more ways can you come up with?Clean up the community. People often throw litter in places where there is already litter. And the problem only becomes worse until someone gets fed up and does something. Could your neighborhood use a cleanup? Neighborhood cleanups are often sponsored by local businesses or schools. But if your community doesn't have a cleanup program, get together with friends to organize one. You could pick up garbage in a larger area twice a year, or you could clean a smaller area every few months.Include the isolated. Do you know anyone who is housebound? Almost all neighborhoods have a few people who have to stay at their homes. These people are often elderly and unable to leave their homes to perform simple tasks. By letting them "borrow" your legs and eyes, you can make them feel included. You can run errands for them like shopping or paying bills. They might like you to read to them if their eyesight is failing. Governments provide some of the services these people need, but programs cannot give them friendship; that's what communities are for!Reading clubs are popular all over Europe and North America. Members might read at home to prepare for discussion, or they might read aloud to each other and talk about what they just read. Either way, a book or article can spark lively discussion and this often challenges people to take action.A. Cleaning your community will have a positive effect on others in society.B. They find a need or an issue you really care about.C. But they belong to the community, too.D. Living in a clean neighborhood will be its own reward.E. Don't hesitate to take part in the community's activity.F. Round up some readers.二、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。
限时训练1
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。
高考语文语言文字运用专项限时训练(一)
2018届高三一轮复习语言文字运用（高考第三大题）限时训练（一）【本考案共1页，共5题，共20分，考试时间25分钟】17．下列各句中加点成语的使用，全都不正确的一项是(3分)( )，①就在两年前，韩国总统朴槿惠还在说有关自己的前助手“幕后干政”的报道是无中生有．．．．纯属谣言，但如今“闺蜜干政”事件却被坐实。
而倒闭的民营书店不同，这家书店较早引入了资本运作，为其在全国②与大多数因惨淡经营．．．．扩张市场助力，但此举也让它承受了更大的压力。
，他以美国新孤立主义、民粹③美国总统竞选终于落幕，地产大亨特朗普让全世界大跌眼镜．．．．主义理念成功击败了原有体制和精英主义的代表希拉里。
④俄罗斯总统专机在途经瑞士领空时，曾遭到该国三架战机的包围拦截，并在几分钟内被抵，险象环生。
近跟踪，场面波诡云谲．．．．⑤有媒体称，印度对中国阻止其加入核供应国集团的指责显得目光如炬，这只会给世界留下．．．．情绪化且缺乏战略眼光的负面印象。
⑥关闭核电站必然要遗留大量核废料，既要关闭核电站，又不愿把核废料存放在自己的家园，。
这个死结使得德国反核能运动进退维谷．．．．A．①③⑥B．②④⑤C．②③⑤D．①④⑥18．下列各句中，没有语病的一句是(3分)( )A．逃亡到欧洲边境的叙利亚难民不少被堵在边境线上，夜晚和衣睡在地上，盖得除少数人有毛毯可充当被子外，大多数人挤在一起御寒。
B．自从中央下定反腐决心、决定“老虎苍蝇一起打”之后，各级政府官员作风大有改观，但仍有不少贪腐分子不知收敛，依然我行我素。
C．据业内人士保守估计，中国现在每年有超过1000万人整形，女性比例为83%，男性比例为17%，而整个行业的年增速则超过30%以上。
D．会议指出，文艺工作者不仅要具有广阔的视野和博大的胸怀，而且和自己学术观点不一样的同行也要互相学习，切磋技艺，取长补短。
19.对联是中华传统文化的瑰宝，对联的写作要求上下联字数相等，平仄相协，音韵和谐，内容相关。
高三英语晚自习限时训练 (1)
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。
选择题限时训练(一)
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40分钟限时练习1-挑战2023年中考数学基础满分训练(原卷版)
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．。
高一英语40分钟限时训练(1)(有答案)
高一英语限时训练1完形填空When Pat Jones finished college，she decided to travel around the world and see as many foreign places as she could __1__ she was young.Pat wanted to visit Latin America __2__，so she got a job __3__ an English teacher in a school in Bolivia.Pat spoke a little Spanish，__4__ she was able to communicate with her students even when they didn’t __5__ much English.A sentence she had read somewhere stuck in her mind；if you dream __6__ a foreign language，you have really mastered(掌握)it.Pat repeated this sentence to her students and __7__ that some day she would dream in Spanish and they would dream in __8__.One day，one of her __9__ students came up and explained in Spanish that he had not done his homework.He had __10__ early and had slept __11__.“What does this have to do with your __12__？”Pat asked.“I dreamed all night，Miss Jones.And my dream was in English.”“In English？”Pat was very __13__，since he was such a bad student.She was __14__ secretly jealous(嫉妒的)．Her __15__ was still not in Spanish.But she encouraged(鼓励)her young student.“Well，__16__me about your dream.”“All the people in the dream __17__ English.”the student said.“And all the signs were in English.All the newspapers and magazines and all the TV programs were in English.”“But that’s __18__，”said Pat.“What did all the people say to you？”“I’m sorry，Miss Jones.That’s __19__ I slept so badly.I didn’t __20__ a word they said.It was a nightmare(噩梦)！”1．A.because B．while C．if D．since2．A.first B．at first C．last D．at last3．A.for B．of C．as D．like4．A.and B．but C．so D．yet5．A.say B．know C．read D．write6．A.in B．about C．of D．for7．A.thought B．realized C．hoped D．wanted8．A.English B．Spanish C．Russian D．German9．A.bright B．excellent C．best D．worst10．A.got up B．gone to bed C．fallen asleep D．woken up11．A.well B．soundly C．badly D．heavily12．A.English B．language C．dream D．homework13．A.surprised B．worried C．pleased D．excited14．A.yet B．seldom C．also D．still15．A.study B．class C．word D．dream16．A.answer B．write C．tell D．ask17．A.read B．liked C．spoke D．learned18．A.wonderful B．terrible C．funny D．strange19．A.how B．why C．when D．because20．A.hear B．understand C．know D．remember阅读理解A篇In order to know a foreign language thoroughly(完全地)，four things are necessary.First，we must understand the language when we hear it spoken.Second，we must be able to speak it ourselves，correctly with confidence(自信)and without hesitation(犹豫)．Third，we must be able to make sentences that are correct in grammar.There is no short way to succeed in language learning .A good memory(记忆)is a great help，but is not enough only to memorize the rules from a grammar book.It is no much use learning by heart long lists(一览表)of words and their meanings，studying the dictionary and so on.We must learn by using the language.If we are pleased with a few rules we have memorized，we are not really learning the language.We must“learn through use”．Practice is important.We must practise speaking and writing the language whenever(无论何时)we can.21. The most important things to learn a foreign language are ______.A．understanding and speakingB．hearing，speaking，reading and writingC．writing and understandingD．memorizing and listening22. Someone hears and writes English very well，but he speaks it very badly.This isbecause________.A．he doesn’t understand the language when he hears it spokenB．he doesn’t have a good memoryC．he always remembers lists of words and their meaningsD．he often hesitates to practise speaking it23. Which of the following is the most important in learning a foreign language?A．A good memory. B．Speaking. C．Practice. D．Writing.24. “learn through use”means ______.A．we use a language in order to learn itB．we learn a foreign language in order to use itC．we can learn a language well while we are using itD．both B and CB篇A student is learning to speak British English.He wonders(想知道)：Can I communicate(交际)with Americans? Can they understand me? Learners of English often ask：What are the differences between British and American English? How important are these differences?Certainly，there are some differences between British and American English.There are a few differences in grammar.For example，speakers of British English say“in hospital”and“Have you a pen?”；Americans say “in the hospital”and“Do you have a pen?”．Pronunciation is sometimes different.Americans usually sound “r”s in words like“bird”and“hurt”．Speakers of British English do not sound “r”in these words.There are differences between British and American English in spelling and vocabulary. For example，“colour”and“honour”are British；“color”and“honor”are American.These differences in grammar，pronunciation，spelling and vocabulary are not important，however. For the most part，British and American English are the same language.25. American English and British English are different in ________.A．spelling B．pronunciation C．grammar D．all of the above26. What is NOT mentioned in the passage?A．Whether there are differences between British English and American English.B. Whether British English and American English are one language or two.C. How the differences between British English and American English cameabout.D．How important the differences are.27．Most ______ say，“Do you have a watch？”A．British people B．Americans C．children D．teachers 28．According to this passage，British people and Americans have ________ difficulty in understanding each other.A．little B．much C．some D．great语法填空Changes in Means of Transportation in Beijing.There have been many changes in the means of transportation in Beijing in recent years. From 1996 1._______ 2000,the number of the bicycles has2.________ (increase) by 40%, for it is convenient3._______ a good form of exercise to ride a bicycle. Over 18,000 taxis have appeared in 2000. More and more people like to take4.______(taxi) because they can save a lot of time and the price is5._________(reason). The number of private cars is 51000,6.________ is three times as much as that in 1996. We can see more and more people are7._______(get) rich and can afford to buy cars of8._______(they) own. The number of buses9.______(do) not change much. Though it is cheap to take buses, they are slow, dirty and crowded. Something must be done to improve 10.________ conditions of buses.短文改错Last night when Jim was getting over his lessons, his Grandma came into her room and chatted with him for a while. Then she got up from the sofa and wanted go to her bedroom. And suddenly she fell down to the ground. Jim was very frightened. Knew her heart trouble must have come again, he quickly phoned the nearest hospitals for help. Before the doctors came, he helped his grandma lay on her back and comfort her, which made her feel better. Soon help came in and his grandma was sent to hospital at once. One doctor said Jim had done the right thing and actual saved her life.高一英语限时1答题纸完形填空1-5 ____________________ 6-10____________________11-15____________________ 16-20____________________阅读理解21-24____________________ 25-28____________________语法填空1.___________2.__________3.__________4.__________5.__________6.__________7.__________8.__________9.__________10.__________短文改错Last night when Jim was getting over his lessons, his Grandma came into her room and chatted with him for a while. Then she got up from the sofa and wanted go to her bedroom. And suddenly she fell down to the ground. Jim was very frightened. Knew her heart trouble must have come again, he quickly phoned the nearest hospitals for help. Before the doctors came, he helped his grandma lay on her back and comfort her, which made her feel better. Soon help came in and his grandma was sent to hospital at once. One doctor said Jim had done the right thing and actual saved her life.高一英语限时1答案完型填空BACCB ACADB CDACD CCABB阅读理解BDCC DCBA语法填空 1.to 2.increased 3.and 4. taxis 5. reasonable 6.which 7.getting 8.their 9.does 10.the短文改错getting---going 2. her---his 3. wanted后加to 4.And---But 5. knew--knowing 6.hospitals---hospital y---lie fort---comforted 9.in删去10. actual---actually。
高三英语晚自习限时训练 (1)
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。
湖北省恩施市一中(理科)限时训练(一)试题与答案
高二(下)数学（理科）限时训练（一）答案高二(下)数学（理科）限时训练（一）考试范围：椭圆；考试时间：2014年02月14日；命题人：田超学校：___________姓名：___________班级：___________考分：___________ 一．选择题（每题5分，满分30分）1、椭圆的离心率为（）A．B．C．D．2、已知椭圆长轴长、短轴长和焦距成等差数列，则该椭圆的离心率是()A．B．C．D．3、过椭圆的左焦点作直线交椭圆于两点，是椭圆右焦点，则的周长为（）A．B．C．D．4、已知,是椭圆的两个焦点，若椭圆上存在点P，使得,则椭圆的离心率的取值范围是（）A．B．C．D．5、椭圆＝1的左右焦点分别为、，点是椭圆上任意一点，则的取值范围是( )A．B．C．D．6、椭圆C:的左右焦点分别为F1,F2,P为椭圆上异于端点的任意的点，PF1,PF2的中点分别为M,N,O为坐标原点，四边形OMPN的周长为2，则△的周长是（）A．B．C．D．二，填空题（每题5分，满分20分）7、已知P为椭圆上一点，F1,F2是椭圆的焦点，∠F1PF2=900,则△F1PF2的面积为___________;8、若过椭圆＝1内一点(2,1)的弦被该点平分，则该弦所在直线的方程是______9、如图，是椭圆在第一象限上的动点，是椭圆的焦点，是的平分线上的一点，且，则的取值范围是 .10、已知当取得最小值时，直线与曲线的交点个数为11、（满分14分0已知椭圆过点，且离心率．（1）求椭圆的标准方程；（2）是否存在过点的直线交椭圆于不同的两点M、N，且满足（其中点O为坐标原点），若存在，求出直线的方程，若不存在，请说明理由．1.A【解析】试题分析：根据题意，由于，可知a=2，b=1,那么可知，故可知结论为，选A.考点：椭圆的性质点评：主要是考查了椭圆的几何性质的运用，属于基础题。
2.B【解析】试题分析：椭圆长轴长、短轴长和焦距成等差数列，即2a,2b,2c成等差数列，所以，，又，所以，，选B。
高三物理模拟限时训练题 (一)
2011—2012学年高三第二学期模拟练兵限时训练物理试题（一） 2012.05二、选择题（本题包括7小题，每小题给出的四个选项中，有的只有一个选项正确，有的有多个选项正确，全部选对的得4分，选对但不全的得2分，有选错的得0分）14．如图甲所示，一物块在粗糙斜面上，在平行斜面向上的外力F 作用下，斜面和物块始终处于静止状态，当F 按图乙所示规律变化时，关于物块与斜面间摩擦力的大小变化的说法中正确的是 A ．一定增大 B ．可能一直减小 C ．可能先减小后增大 D ．可能一直增大15. 质量为2kg 的物体，放在动摩擦因数=0.1μ的水平面上，在水平拉力的作用下由静止开始运动，拉力做的功W 和物体随位臵x 变化的关系如图所示，取重力加速度210/g m s =。
则A.0x m =至3x m =的过程中，物体的加速度是2.5m/s 2B.6x m =时，拉力的功率是6WC.9x m =时，物体的速度是3m/sD.3x m =至9x m =的过程中，合力做的功是12J16.如图甲所示，理想变压器原、副线圈的匝数比为11：1，R 1＝20 Ω，R 2＝30 Ω，C 为电容器。
已知通过R 1的正弦交流电如图乙所示，则A.交流电的频率为50 HzB.原线圈输入电压的最大值为V C.电阻R 2的电功率约为6.67 W D.通过R 3的电流始终为零17. 2011年9月29日，我国成功发射了“天宫一号”目标飞行器，“天宫一号”进入工作轨道后，其运行周期约为91 min 。
随后不久发射的“神舟八号”飞船在2011年11月3日凌晨与“天宫一号”在太空实现交会对接。
若对接前的某段时间内“神舟八号”和“天官一号”处在同一圆形轨道上顺时针运行，如图所示。
下列说法中正确的是 A ．“神舟八号”的线速度大于同步卫星的线速度 B ．“神舟八号”和“天宫一号”的运行周期相同 C ．“神舟八号”和“天宫一号”的向心力大小相同D ．若“神舟八号”仅向运动相反方向喷气加速，它将能在此轨道上和“天宫一号”实现对接18.如图甲所示,在光滑绝缘的水平面上固定两个等量负点电荷A 和B,O 点为AB 连线的中点,C 、D 为AB 连线上关于0点对称的两个点,且CO=OD=L 。
限时综合训练(一)
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
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限时训练（一）
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△F1PF2 的面积为
.
16.给出下列四个命题：
①在频率分布直方图中，各个小矩形对应的纵坐标读数之和为 1.
②某商店售出甲种产品 350 件，乙种产品150 件，为了了解产品的使用满意情况，用分层 抽样法从这两种产品中抽取一个容量为 n 的样本，已知甲种产品抽到 7 件，则样本容量 n
为10 .
③学校随意安排甲、乙、丙 3 位老师在五一节假期间值班.每人值 1 天，则甲排在乙前的概
1
率为 .
3
④已知函数
f
面积为（ ）.
A. 3
B. 2 5
C. 6
D. 8
3
3
4
正视图
2
2
2 侧视图
俯视图
5.若连续抛掷两次骰子得到的点数分别为 m ， n ，则点 P m, n 在直线 x y 4 上的概率
是（ ）.
1
A.
3
1
B.
4
1
C.
6
1
D.
12
6.某程序框图如图所示，执行该程序.若输入 P 24 ，则输出 S 的值为（ ）.