高二第7周周末练
高二英语周周练7新人教版
吉林省长春市实验中学高二英语周周练（7）新人教版I.单项填空1・ _______ , I think, and you will settle the problem.A. So long as you keep up your spirits B ・ If you make your effortC ・ Making great effortsD ・ A bit more effort2・ The football player had __________ gift for football when he was a child ・Now he is _____________ second to none in the football field ・A. the; the B ・ the; a C ・ a; the D ・ a; /3・ To our disappointment, the trip we had been looking forward to________ in the pouring rain ・A ・ startingB ・ startC ・ to startD ・ started4・一 _________ you called yesterday evening?—My sister .Why?A ・ Who it is thatB ・ Who is it thatC ・ Who was it thatD ・ Who it was that5・ 一Why didn ，t you come to the cinema with us last Saturday?一Oh, sorry .But I ________ the film ・A. see B ・ saw C ・ have seen D ・ had seen6・ Li Na returned to Wuhan after the Games» _____________ , as is knownto us, she had been brought up and trained to be a gold medalist of tennis ・ A ・ when B ・ that C ・ there D ・ where7・ Do you think that bridge __________ 2,000 meters long? It doesn* tappear _________ long ・A. measures; that B ・ is measured; soC ・ is measured; suchD ・ measures; much8・ Look at the sweat on her face.She ___________ the house since she got upthis morning ・A. is cleaning B ・ has been cleanedC ・ was cleaningD ・ has been cleaning9・ The research mainly deals with the difficulty the students have _______________their attention on their study all the time ・A. to focus B ・ to be focused C ・ focusing D ・ focused10・ It's wise of you to _________ your father* s advice when you come toany difficulty ・A. ask B ・ seek C ・ try D ・ attempt11 ・ Their mother ________ dinner at the kitchen when a quarrel _____________ amongthe children ・A ・ was preparing ： was broken outB ・ prepared ： was broken outC ・ was preparing ： broke outD ・ prepared ： broke out12・ It has been announced recently that all the schools ______________ not havethe students attend school ifthe students have high temperatures. A. need B ・ shall13. —Mom, may I play— ________ ! DadA. Help yourself14. He lost both of his parents in the big earthquake, butkind couple adopted him and took good care of him. C ・ could D ・ ought tocomputer games just for a while? is writing his paper ・B ・ It's up to youC ・ Behave yourselfD ・ Go ahead for him,A・ suddenly B・ Naturally C・ obviously D・ luckily 15・ His health because his business broke up.A. broke out B・ broke down C・ broke off D・ broke intoII.改错： AMy hometown is a pretty city, so people there are kind and polite .With coming of spring, grass and trees turn green, and flowers grew in many colors・ In summer, the sea under the blue sky is even much beautiful・ After autumn arrives, the city looks as an old man with leaves fallen from the trees・ In winter, a lot of white birds come to my city for food・ I can wait more patiently above the sea for quite a long time .While they find fish coming to the surface, they fly down immediate and catch them without delay. That is my city, and I love it so much・BTime and tide wait no man・ My mother is becoming a middle-age womanquietly・ She had been busy running after us all the years・ My father is very busy every day outside・ But the heavy burden falls on my mother' s shoulder・ Because my school is far from my home, I have to go to school by the train and my mother sees me off at the station every time・ I often choose a seat where is close to the window, so I can see her・ However, I always can* t help run tears from my eyes・ All the buildings and people outside the window disappear・ I wave gentle to my mother and I look at her till the view of her back disappears ・ Up to now, even if he is busy, she still does it as usua 1・ The view of my mother* s back will never change in my heart.文档从网络中收集，已重新整理排版.word版本可编辑:•欢迎下载支持.周周练？【答案】1~5DDD€D 6-10DADCB 11~15 CBCDB短文改塔：so- and 2. the comi ng 3. grew— grow 4,rnuch-rnore 5. as—like 6 fallen-falling?. I-They 8.去掉more 9. While—When 10.immediate…immediatelyTime a nd tide wait 人no man. My mother is becoming middle-age womantor middle-agedquietly・ She liad been busy i unnin<| after us all theye^rs・ My father veiy busy everyh asci ay outside. Butthe heavy burden falls on my mother s shoulder. Because my school i$ So shouldersfarfrom my home ・ I have to goto school by the train and my mother sees me off at thestation every time. I often choose a seat where is close to the window. so I can see her. which that However.l always- can't help run tears from my eyes .All the buildings and people runningoutside the wihdow disappear. I wave gentle to my mother and I look at her till the gentlyview other back disappears. Up to now .evenif hjis bus y. she still does it as usual.sheThe view of my mothers book will never change in my heart。
高二英语周末测试(七)参考答案
高二英语周末测试（七）参考答案2020. 4. 4第I卷（共95分）第一部分听力（共20小题; 每小题1.5分，满分30分）1—5 BCABC 6—10 BACAB 11—15 ABCBC 16—20 ACAAB第二部分阅读理解（共两节，满分50分）第一节（共15小题;每小题2.5分，满分37.5分）21 -23 CBB 24-27 CBAC 28 -31 ACCD 32-35 CBAD第二节（共5小题;每小题2.5分，满分12.5分）36 -40 EBACF第三部分语言运用（共三节，满分30分）第一节（共15小题;每小题1分，满分15分）41—45 CAADB 46—50 CDCDA 51—55 CBDAB第II卷（共55分）第二节（共10小题; 每小题1.5分，满分15分）56. which 57. and 8. difficulties 59. winning 60. their61. against 62. supported 63. impossible 64. to fight 65. finally第四部分应用文写作（满分15分）Dear Michael，I'm glad to know that you are learning Chinese language and culture. As for my family spirits, there are definitely some good qualities. My parents lay emphasis on the importance of courtesy, honesty, bravery, perseverance and diligence. Moreover, they have set good examples for me. Under the profound influence of such spirits, I'm always friendly to people and ready to help others. Whenever I encounter difficulties, I always think of ways to overcome them. Owing to this, I have made great achievements in my study and life.Hopefully this can offer you a deep understanding about Chinese family spirits.Yours，Li Hua附：听力原文材料Text 1W: How do I look?M: Not bad. Does it fit all right?W: Uh, a bit tight around here.M: I really like the color. It matches your handbag.Text 2W: We hav en’t seen much of you lately in the company. Have you been away on business?M: No, I’ve been away on holiday. I’ve got a cousin in Edinburgh.Text 3M: It drives me mad when people use their cell phones at the wheel.W: Hmm. What happened?M: I nearly had an accident because the woman was talking on her cell phone while driving and didn’t see the traffic lights turn red. She nearly killed me!Text 4M: Sarah, I’m prepared to run for class monitor, and I’m wondering if I, er…if I can count on your support.W: Oh, maybe if you had asked me sooner, but my roommate’s running, too, and I’ve already promised her that she had my support.Text 5W: Have you bought a new camera again? You’re turning my flat into a camera museum!M: I’ll stop. I’ll try. But I probably can’t. I see a new model and my knees go weak!Text 6W: May I help you, sir?M: Yes, please. I want to buy a personal gift for my brother. He’s taking a trip to South America. W: Is he going by ship or plane?M: He’s flying. My gift will hav e to be something light in weight. What can you suggest?W: What about this tie? It’s made of pure silk.M: My sister already gave him one. I’d like something unusual. Let me look around…oh, that clock looks nice, but…W: Hey, here is a gift for the man who has everything.M: Oh, a folding toothbrush! That’s a wonderful idea! I’ll take it.Text 7W: Have you heard that the boss of the law office where Rick works wants him to fly to Brazil and do a month’s work there?M: That’s nice. He will love it because everything will be paid for, such as air travel, meals, hotel…and this is his first time to get out of the States.W: Indeed. You won’t believe how much he is looking forward to it, and how much his little sister admires him! He’s going to enjoy lying on the beaches when work is done, and he promisedto buy his sister gifts.M: Who else is going besides him?W: He’s going alone.M: When will he be leaving?W: He was told about it three days ago, and I think he’ll leave in a week.Text 8M: Oh, who is the beautiful old woman in front of the house?W: That’s my grandmother.M: Oh, then that must be your house in the background. Where is it?W: No, that’s my grandmother’s house. She lives in Kentucky. We live in Boston, about two-and-a-half hours away by plane.M: Then, does she live with your uncle or aunt?W: No. Since her husband died, she has lived alone.M: Alone? But she is so old! Who takes care of her?W: She takes care of herself, though she is 81 this year and is beginning to slow down a little. She has a cleaning lady who comes for a few hours a week to clean house and help with the shopping.M: But isn’t she lonely without family?W: Of course not. She has lived in the same neighborhood since she was first married, so she knows all the neighbors, young and old, and she has lots of friends.M: Why doesn’t she live with you? Don’t you miss her?W: Well, actually, we talk to her on the phone every week and visit her at least once a year, but we are busy with our lives and so is she. We love to have her visit, but we all know that if she lived with us, we might not get along so well.Text 9W: And I realized we were completely lost, but at least we got there in the end.M: Funny you should say that because, er, a similar thing happened to me one time when I was abroad. We were actually doing a concert in this bar in Germany.W: Really?M: I was actually about to appear on stage, you know, with the band, and I just though t, “I’ll just go out for a little walk and get some fresh air,” ‘cause I had about a half an hour before we had to go on.W: Uh-huh.M: And I went outside, you know, had a look around, walked around for a bit…and then I decided to go back and, uh, I couldn’t find it! It was about two minutes before we were supposed to start.W: No, you’re joking!M: Yeah! I thought, “Ah! What am I gonna do?”W: Could you ask for directions?M: Well, I tried. I asked this old woman, but she didn’t speak English, and I don’t speak German…W: Don’t you? Oh, right.M: And then, I realized I couldn’t remember the name of the bar, or the street it was on or anything. So, you know, I was in the middle of a town I didn’t know, not knowing the language…and luckily, I saw someon e wearing one of our T-shirts. He was obviously going to the concert, so I sort of followed him back to the bar.W: Wow, that was lucky! Thank goodness!M: And when I got there, the guys were like, “Where have you been? We thought you’d run out on us!” Any way, we managed.Text 10M: Hello. I’m Callum Robertson, and this is London Life. In the program today, let me ask you a question first: What do you think would be the hardest job in Britain? A police officer? Perhaps a deep-sea fisherman? Well, no, according to recent research, being a London taxi driver takes that prize. It’s really a hard job, really difficult. One reason is the traffic. It’s getting worse and worse in London. For most of us, if we have to sit in a traffic jam for a few minutes, we get anxious. But imagine if you had to do that all day, every day as your job. What’s more, passengers get into the taxi and want to get from A to B as quickly as possible. They’re in a hurry, and that makes things worse for the drivers. To prepare for the test, would-be drivers have to remember ways and places of interest around Central London. This is an area which has about 25,000 streets. They need to be able to take passengers from A to B without having to look at a map and without having to ask for directions. It usually takes nearly three years to pass the test, so it is also found in the research that parts of the brains of taxi drivers are actually larger than those in the general population. It seems as if learning all the streets and ways makes a part of the brain grow. Well, anyway, this is a most tiring job. Next time you’re stuck in a traffic jam and feel mad, spare a thought for the taxi drivers, who have to spend most of their working life in them.。
2021年高二上学期第七次周练物理试题 含答案
2021年高二上学期第七次周练物理试题 含答案简伟伟一、选择题：（本题包括6小题，共60分， 其中1-3题为单项选择题，每小题只有一个选项符合题意，4-6为多项选择题，每小题有多个选项符合题意，选不全得2分，有错选或不选不得分）1．如图所示的实验装置中，极板A 接地，充电后的平行板电容器的极板B 与一个灵敏的静电计相接。
将A 极板向左移动，增大电容器两极板间的距离时，电容器所带的电量Q 、电容C 、两极间的电压U ，电容器两极板间的场强E 的变化情况是( )A ．Q 变小，C 不变，U 不变，E 变小B ．Q 变小，C 变小，U 不变，E 不变C ．Q 不变，C 变小， U 变大，E 不变D ．Q 不变，C 变小，U 变大，E 变小2.如图光滑绝缘细杆与水平面成θ角固定，杆上套有一带正电的小球，质量为m ，带电荷量为q .为使小球静止在杆上，可加一匀强电场．所加电场的场强满足什么条件时，小球可在杆上保持静止( )A ．垂直于杆斜向上，场强大小为mg cos θqB ．竖直向上，场强大小为mg qC ．垂直于杆斜向下，场强大小为mg sin θqD ．水平向右，场强大小为mg cot θq3．A 、B 两个小球带同种电荷，放在光滑的绝缘水平面上，A 的质量为m ，B 的质量为2m ，它们相距为d ，同时由静止释放，在它们距离到2d 时，A 的加速度为a ，速度为v ，则( )A ．此时B 的加速度为a /4 B ．此过程中电势能减小5mv 2/8C ．此过程中电势能减小mv 2/4D ．此时B 的速度为v /24．把质量为m 的正点电荷q 在电场中由静止释放，若它运动的过程中不计重力，下列叙述正确的是( )A ．点电荷的运动轨迹必与电场线重合B ．点电荷的速度方向必与所在点的电场线的切线方向一致C ．点电荷的加速度方向必与所在点的电场线的切线方向一致D ．点电荷的受力方向必与所在点的电场线的切线方向一致5．如上图所示，虚线a 、b 、c 为三个同心圆面，圆心处为一个点电荷，现从c 外面一点P 以相同的速率发射两个电荷量、质量都相同的带电粒子，分别沿PM 、PN 运动到M 、N ，M 、N两点都位于圆周c 上，以下判断正确的是( )A ．两粒子带同种电荷B ．两粒子带异种电荷C ．到达M 、N 时两粒子速率仍相等D ．到达M 、N 时两粒子速率不相等6．如图所示，在等量异种电荷形成的电场中，有A 、B 、C 三点，A 为两点荷连线的中心，B 为连线上距A 为d 的一点，C 为连线中垂上距A 也为d 的一点，关于三点的场强大小、电势高低比较，正确的是（ ） A ． B ． C ． D ．姓名：得分：题号答案二、计算题（本题包括2题，请写出计算过程和必要的文字说明，共40分）7. （20分）如图2所示，半径为r的绝缘细圆环的环面固定在水平面上，场强为E的匀强电场与环面平行。
2021-2022年高二上学期第七次周练 英语试题 含答案
2021-2022年高二上学期第七次周练英语试题含答案专项训练1：1. ___ poor at English, I'm afraid I can't make myself ___.A. To be; understandB. I'm ;to understandC. Being ;understandingD. Being; understood2. I have had my bike ___ ,and I'm going to have somebody ___ my radio tomorrow.A. repair; to repairB. repairing; to be repairedC. repaired; repairD. to repair; repairing3. You must get the work ___ before Friday.A. doB. to doC. doingD. done4. ___ the room, the nurse found the tape-recorder ___.A. Entering; stealingB. Entering; goneC. To have entered; being stolenD. Having entered; to be stolen5. We are pleased to see the problem ___ so quickly.A. settledB. having been settledC. be settledD. settling6. Mrs. Brown was much disappointed to see the washing machine she had had ____ went wrong again. (上海xx）A. itB. it repairedC. repairedD. to be repaired7. It is wise to have some money ___ for old age. (NMET1996)A. put awayB. keep upC. give awayD. laid up (put away 放好, 储存. . . 备用, 处理掉, 放弃, 抛弃)8. I don't want the children ___ out in such weather.A. takeB. to takeC. takenD. taking9. I'm afraid that I can't make myself ___ be cause of my poor English.A. understandB. understandingC. to understandD. understood10. The murderer was brought in, with his hands ___ behind his back.A. being tiedB. having tiedC. to be tiedD. tied (表动作完成）专项训练2：1. We found her greatly ___.A. improvingB. changedC. to helpD. having disturbed2. Jane got her bad tooth ___ at the dentist's.A. to put inB. pulled outC. pushed outD. drawing out3. When ____ ,the museum will be open to the public next year. (上海xx)A. pletedB. pletingC. being pletedD. to be pleted4. With a lot of difficulties ___ ,they went to the seashore and had a good rest.A. settledB. settlingC. to settleD. being settled5. The research is so designed that once ___ nothing can be done to change it. (NMETxx)A. beginsB. having begunC. beginningD. begun( once begun 在句中作状语，begin为及物动词:“着手”）6. ___ ,they went home,___.A. Their work had been finished; singing and laughingB. They had finished their work; sang and laughedC. Their work finished; singing and laughingD. after their work finished; singing and laughing7. Before he came to London, he had never heard a single English word ___A. speakingB. speakC. spokenD. to speak8. ____ more attention, the trees could have grown better.A. GivenB. To giveC. GivingD. Having given9. ___ from space, the earth with water ___70％ of its surface looks likea "blue blanket".A. Seen ;coveredB. Being seen; coversC. Seeing; coveringD. Seen; covering10. ____,the experiment will be successful.A. If carefully doingB. If it done carefullyC. If carefully doneD. If doing carefully11. The girl wrote a position without ___.A. askB. askingC. being askedD. to be asked12. He finished his homework and then went on ___me.A. helpingB. with helpC. with helpingD. to help13. ___where to go ,he asked a policeman.A. Having lost his way and not knowingB. Losing his way and didn't knowC. Having lost his way and didn't knowD. Lost his way and didn't know14. ____ her friend was badly hurt, she burst into tears.A. HearingB. Having heardC. To hearD. Heard15. ____ his team had won, his face lit up at once.A. KnowingB. When knowingC. After knowingD. When he knew专项训练3：1. They hurried back home only to find their house ___ into.A. breakB. to breakC. brokenD. breaking2. When he came to, he found himself ___ on a chair, with his hands ___ back.A. to sit; tiedB. sitting; tyingC. sat; tiedD. sitting; tied3. We do not feel ___ to enter modern buildings; everything about them seems unfriendly.A. invitedB. invitingC. to inviteD. to be invited(feel后加形容词，此处的invited 表主语we 的感受)4. I'm going to have my letters ____ tomorrow if I've got them ready by then.A. to typeB. typeC. typedD. typing5. Every great culture in the past had its own ideas of beauty ___ in art and literature.A. expressedB. to expressC. being expressedD. to be expressed答案：专项训练1：1-10 DCDBA CACDD专项训练2：:1-15 BBAAD DDADC CDDAD专项训练3：:1-5 CDACA32774 8006 耆30541 774D 睍u830988 790C 礌35368 8A28 訨37239 9177 酷8<34644 8754 蝔x27416 6B18 欘€P。
高二第二学期物理第七周周测试题和答案
城区学校理综基础训练（七）物理一、单选题（每小题4分，共60分）1.关于物体的运动，以下说法正确的是( )A.物体做平抛运动时，加速度不变B.物体做匀速圆周运动时，加速度不变C.物体做曲线运动时，加速度一定改变D.物体做匀变速直线运动时，加速度可能变也可能不变2.从地面以大小为v 1的初速度竖直向上抛出一个皮球，经过时间t皮球落回地面，落地时皮球的速度的大小为v 2。
已知皮球在运动过程中受到空气阻力的大小与速度的大小成正比，重力加速度大小为g。
下面给出时间t的四个表达式中只有一个是合理的。
你可能不会求解t，但是你可以通过一定的物理分析，对下列表达式的合理性做出判断。
根据你的判断，你认为t的合理表达式应为（）A. B. C. D.3.一轻杆一端固定质量为m的小球，以另一端O为圆心，使小球在竖直平面内做半径为R 的圆周运动，如图所示，则 ( )．A.小球过最高点时，杆所受弹力不可能大于重力B.小球过最高点时的最小速度是C.小球过最低点时，杆对球的作用力一定跟小球所受重力的方向相反D.小球过最高点时，杆对球的作用力一定跟小球所受重力的方向相反4、下列运动过程中，在任意相等时间内，物体的动量变化量不相等的是：（）A．匀速圆周运动 B．任意的匀变速直线运动C．平抛运动 D．竖直上抛运动5、在物体运动过程中，下列说法不正确的是( )A．动量不变的运动，一定是匀速运动B．若某一个力对物体做功为零，则这个力对该物体的冲量也一定为零C.、动量大小不变的运动，可能是变速运动D．如果在任何相等时间内物体所受的冲量相等(不为零)，那么该物体一定做匀变速运动6．两球A、B在光滑水平面上沿同一直线，同一方向运动，m A=1 kg，m B=2 kg，v A=6 m/s，v B=2 m/s。
当A追上B并发生碰撞后，两球A、B速度的可能值是( )A. v A′=5 m/s，v B′=2.5 m/sB. v A′=2 m/s，v B′=4 m/sC. v A′=－4 m/s，v B′=7 m/sD. v A′=7 m/s，v B′=1.5 m/s7、近年来，数码相机几近家喻户晓，用来衡量数码相机性能的一个非常重要的指标就是像素，1像素可理解为光子打在光屏上的一个亮点，现知300万像素的数码相机拍出的照片比30万像素的数码相机拍出的等大的照片清晰得多，其原因可以理解为( )A．光是一种粒子，它和物质的作用是一份一份的B．光的波动性是大量光子之间的相互作用引起的C．光具有波粒二象性，大量光子表现出光的波动性D．大量光子表现光具有粒子性8. 关于光电效应下述说法中正确的是 ( )A. 光电子的最大初动能随着入射光的强度增大而增大B. 任何一种金属都有一个极限频率，低于这个频率的光不能发生光电效应C. 在光电效应中，饱和光电流的大小与入射光的频率无关D. 只要入射光的强度足够强，照射时间足够长，就一定能产生光电效应9．如图所示，理想变压器原、副线圈的匝数比n1:n2=1:3，次级回路中联入三个均标有“36V，40W”的灯泡, 且均正常发光，那么, 标有“36V、40W”的灯泡A（）A、也正常发光B、将被烧毁C、比另三个灯暗D、无法确定10．下面对阴极射线的认识正确的是( )A．阴极射线是由阴极发出的粒子撞击玻璃管壁上的荧光而产生的B．只要阴阳两极间加有电压，就会有阴极射线产生C．阴极射线可以穿透薄铝片，这说明它是电磁波D．阴阳两极间加有高压时，电场很强，阴极中的电子受到很强的库仑力作用而脱离阴极11．关于密立根“油滴实验”，下列说法正确的是( )A．密立根利用电场力和重力平衡的方法，测得了带电体的最小质量B．密立根利用电场力和重力平衡的方法，测出了带电体的最小带电荷量C．密立根利用磁偏转的知识推测出了电子的电荷量D．密立根“油滴实验”直接验证了电子的质量不足氢离子的千分之一12．在α粒子散射实验中，选用金箔的原因下列说法不正确的是( ) A．金具有很好的延展性，可以做成很薄的箔B．金核不带电C．金原子核质量大，被α粒子轰击后不易移动D．金核半径大，易形成大角度散射13.下列说法符合历史事实的是( )A．牛顿首先建立了平均速度、瞬时速度和加速度概念用来描述物体的运动B．法拉第发现了电磁感应现象，他慨括出四类情况能够产生感应电流C．伽利略直接通过研究自由落体实验得出自由落体运动是匀变速运动D．奥斯特发现电流的磁效应时将直导线沿南北方向、平行于小磁针放置在其上方，给导线通电，发现小磁针偏转14、如图所示，把一通电直导线放在蹄形磁铁磁极的正上方，导线可以自由移动，当导线中通过如图所示方向的电流时，导线的运动情况正确的是（）A．顺时针方向转动，同时下降B ．顺时针方向转动，同时上升C ．逆时针方向转动，同时下降D ．逆时针方向转动，同时上升15.用长为L 的细绳拴着质量为M 的小球在竖直平面内作圆周运 动,则下列说法正确的是( )A.小球在圆周运动最高点时绳子的拉力一定不可能为零B.小球在圆周运动的最高点的速度一定是 glC.小球在圆周的最低点时拉力一定大于重力D.小球在圆周最高点所受的向心力一定是重力二、不定项选择题（每小题8分，漏选得4分，选错不得分。
高二英语周周练(7)新人教版
吉林省长春市实验中学高二英语周周练（7）新人教版I.单项填空1．________， I think, and you will settle the problem.A．So long as you keep up your spirits B．If you make your effort C．Making great efforts D．A bit more effort2．The football player had ________ gift for football when he was a child.Now he is ________ second to none in the football field.A．the; the B．the; a C．a; the D．a; /3．To our disappointment, the trip we had been looking forward to ________ in the pouring rain.A．starting B．start C．to start D．started4．—________ you called yesterday evening?—My sister.Why?A．Who it is that B．Who is it thatC．Who was it that D． Who it was that5．—Why didn't you come to the cinema with us last Saturday?—Oh，sorry.But I________the film.A．see B．saw C．have seen D．had seen6．Li Na returned to Wuhan after the Games，________，as is knownto us，she had been brought up and trained to be a gold medalist of tennis.A．when B．that C．there D．where7．Do you think that bridge ________ 2,000 meters long? It doesn't appear ________ long.A．measures; that B．is measured; soC．is measured; such D．measures; much8．Look at the sweat on her face.She________the house since she got upthis morning.A．is cleaning B．has been cleanedC．was cleaning D．has been cleaning9．The research mainly deals with the difficulty the students have ________their attention on their study all the time.A．to focus B．to be focused C．focusing D．focused10．It's wise of you to ________ your father's advice when you come toany difficulty.A．ask B．seek C．try D．attempt11．Their mother ________ dinner at the kitchen when a quarrel________ amongthe children.A．was preparing；was broken out B．prepared；was broken outC．was preparing；broke out D．prepared；broke out12．It has been announced recently that all the schools________ not havethe students attend school if the students have high temperatures.A．need B．shall C．could D．ought to13．—Mom，may I play computer games just for a while?—________！ Dad is writing his paper.A．Help yourself B．It's up to you C．Behave yourself D．Go ahead14．He lost both of his parents in the big earthquake, but ________ for him, a kind couple adopted him and took good care of him.A．suddenly B．Naturally C．obviously D．luckily15．His health ________ because his business broke up.A．broke out B．broke down C．broke off D．broke intoII. 改错： AMy hometown is a pretty city, so people there are kind andpolite.With coming of spring, grass and trees turn green, and flowers grew in many colors. In summer, the sea under the blue sky is even much beautiful.After autumn arrives, the city looks as an old man with leaves fallen from the trees.In winter, a lot of white birds come to my cityfor food.I can wait more patiently above the sea for quite a longtime.While they find fish coming to the surface, they fly down immediate and catch them without delay.That is my city, and I love it so much.BTime and tide wait no man. My mother is becoming a middle-age womanquietly. She had been busy running after us all the years. Myfather is very busy every day outside. But the heavy burden falls on my mother’s shoulder. Because my school is far from my home, I have to go to school by the train and my mother sees me off at the station every time. I often choose a seat where is close to the window, so I can see her. However, I always can’t help run tears from my eyes. All the buildings and people outside the window disappear. I wave gentle to mymother and I look at her till the view of her back disappears . Up to now, even if he is busy, she still does it as usual.The view of my mother’s back will never change in my heart.。
第二高级中学高二数学下学期周练(七)理(2021年整理)
河南省正阳县第二高级中学2017-2018学年高二数学下学期周练（七）理编辑整理：尊敬的读者朋友们：这里是精品文档编辑中心，本文档内容是由我和我的同事精心编辑整理后发布的，发布之前我们对文中内容进行仔细校对，但是难免会有疏漏的地方，但是任然希望（河南省正阳县第二高级中学2017-2018学年高二数学下学期周练（七）理）的内容能够给您的工作和学习带来便利。
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河南省正阳县第二高级中学2017-2018学年下期高二理科数学周练（七）一.选择题:1.已知集合{|11}M x x =-<，22{|log (23)}N y y x x ==++,则M N =（ ）1.{|12}x x ≤< B.{|02}x x << C. {|02}x x << D.∅2。
已知i 为虚数单位，则复数2(1)1i i+-的虚部等于（ ） A 。
-1 B 。
— i C. i D.13.已知向量(cos ,sin )a θθ=，(3,1)b =，则a b -的最大值是（ ）A 。
1B 。
3 C.3 D 。
94。
等差数列{}n a 的前n 项的和为n S ，81126a a =+，则9S =（ ）A 。
54B 。
45 C.36 D.275.下列四个命题中的真命题是( )A.x R ∃∈，使得sinx+cosx=1.5 B 。
,x R ∀∈总有2230x x --≥C 。
,x R ∀∈2,y R y x ∃∈< D. x R ∃∈，,y R ∀∈y.x=y6.要得到函数cos(2)3y x π=-的图象,只需将函数y=sin2x 的图象（ ）个单位 A 。
河北省保定市高阳中学2013-2014学年高二上学期第七次周练 语文试题 word版含答案
高二语文周练七1．下列词语中加点的字，读音全都正确的一组是( )A．恐吓．(hè)伎俩．(liǎ)沐猴而冠．(ɡuàn) 拈．轻怕重(niān)B．款识．(zhì) 悖．逆(bèi)滂．沱大雨(pānɡ) 胼手胝．足(zhī)C．澎湃．(pài) 痼．疾(ɡù)暴戾恣睢．(suī) 歃．血为盟(chà)D．脐．带(qí) 箭镞．(cù)钟鼓馔．玉(zhuàn) 不分畛．域(zhěn)2．下列各句中，加点的成语使用不恰当的一项是( )A．中国的城市化道路和房地产政策，不是小修小补的问题，而是要整体反思，改弦易辙．．．．，跳过中等收入陷阱，顺利实现城市化、现代化，同时又保持贫富差距逐步缩小的趋势。
B．2011年上海游泳世锦赛混合接力赛中，美国队实力强大，特别是第二棒的索尼和第四棒的富兰克林，她们在比赛中完全甩开了其他选手，让现场观众叹为观止．．．．。
C．北约对利比亚的军事行动已经持续了4个多月，但战局依然处于胶着状态，卡扎菲部队与反对派武装此起彼伏．．．．，卡扎菲压力不断增加，反对派至今没有强劲的进攻力。
D．政府角色是否公正？政府措施是否得当？甚至包括政府公布的信息中，是否存在虚假？这些质疑后来都被证实了。
与之对应的是，政府的信用一落千丈．．．．3．下列各句中，没有语病的一句是( )A．2011年8月12日晚上8时，第26届世界大学生夏季运动会正式开幕。
开幕式以仪式为主线，共有6个篇章：《鲜花礼赞》、《开门鼓舞》、《激情之夜》、《春天的故事》、《与书共舞》、《绿道英姿》。
B．此次“秀城市，寻明星”选拔活动，是2012年CCTV网络春晚三大线下选拔活动之一，继续了首届网络春晚广受好评的“零门槛、零距离、草根性、原则性”特性。
C．杭州女工吴菊萍徒手接住坠楼的女孩，这一事迹不仅感动了世界，美联社、法新社等欧美媒体都报道了她的事迹，而且感动了国人，大家通过各种方式表达对吴菊萍的敬意。
华科附中2024届高二上数学周测训练(7)(教师版)
华科附中2024届高二（上）数学周测(7)一、单项选择题(每小题5分，共40分.每小题只有1个正确选项.)1.直线tan 4x π=-的倾斜角是（ ）A. 0B.2π C.34π D.4π 【解析】Btan4x π=-=-1，直线与x 轴垂直，故倾斜角为2π，选B. 2．已知方程221104x y t t +=--表示的曲线是椭圆，则t 的取值范围（ ）A ．()4,7B ．()()4,77,10⋃C ．()7,10D ．()4,10【解析】B因为方程221104x y t t +=--表示的是椭圆，则⎪⎩⎪⎨⎧-≠->->-41004010t t t t 即10774<<<<x x 或，故选B.3.抛掷一颗质地均匀的骰子，记事件A 为“向上的点数为1或4”，事件B 为“向上的点数为奇数”，则下列说法正确的是（ ）A ．A 与B 互斥 B ．A 与B 对立C ．()23P A B +=D ．()56P A B += 【解析】C当向上的点数为1时，事件A 与事件B 都发生，则A 与B 不互斥也不对立；3264)(==+B A P ，故选C. 4．向量()2,1,a x =，()2,,1b y =-，若5a =，且a b ⊥，则x y +的值为（ ） A ．1- B ．1C ．4-D ．4【解析】C 因为5a =ab ⊥，所以⎩⎨⎧-==⎩⎨⎧=-+=++4045142y x x y x 解得，因此4-=+y x ，选C.5.下列命题中不正确的是（ ）A ．一组数据1,2,3,3,4,5的平均数，众数，中位数相同B ．有A ，B ，C 三种个体按3∶1∶2的比例分层抽样调查，如果抽取的A 个体数为9，则样本容量为30 C ．若甲组数据的方差为5，乙组数据为5,6,9,10,5，则这两组数据中较稳定的是乙D ．一组数6,5,4,3,3,3,2,2,2,1的85%分位数为5 【解析】B1,2,3,3,4,5的平均数、众数、中位数都为3，故选项A 正确；A ，B ，C 三种个体按3∶1∶2的比例分层抽样调查，如果抽取的A 个体数为9，则样本容量应该为1821339=++÷，故选项B 错误；乙组数据的方差为4.4，4.4>5，则数据乙较稳定，故选项C 正确；6,5,4,3,3,3,2,2,2,1从小到大进行排列为1，2，2，2，3，3，3，4，5，6，因为108.585%10=⨯，则85%分位数为第9位数，为5.故选项D 正确. 6．若样本12,,,n a x a x a x +++的平均值是5，方差是3，样本1212,12,,12n x x x +++的平均值是9，标准差是b ，则（ ） A ．1,6a b == B ．2,6a b ==C ．2,3a b ==D ．1,23a b ==【解析】D 因为样本12,,,na x a x a x +++的平均值是5，方差是3，样本1212,12,,12nx x x +++的平均值是9，标准差是b ，则32,132921522==⎪⎩⎪⎨⎧=⋅=+=+b a b x x a 解得故选D7．已知椭圆2222:1(0)x y C a b a b +=>>的离心率为63，直线0ax by -=与圆221:04M x y mx +-+=相切，则实数m 的值是（ ）A ．±1B ．2±C ．4±D ．8± 【解析】B圆221:04M x y mx +-+=转化为标准方程为414)2222-=+-m y m x （（12>m ），由题意知解得2±=m ，故选B 8.如图，在正方体1111ABCD A B C D -中，O 是AC 中点，点P 在线段11A C 上，414236222222-=+⋅==+=m ba ma a c e cb a若直线OP 与平面11A BC 所成的角为θ，则sin θ的取值范围是（ ）． A ．23,33⎡⎤⎢⎥⎣⎦B ．11,32⎡⎤⎢⎥⎣⎦C ．33,43⎡⎤⎢⎥⎣⎦D ．11,43⎡⎤⎢⎥⎣⎦【解析】A如图，设正方体棱长为1，()11101A PAC λλ=≤≤，则111A P AC λ=， 以D 为原点，分别以DA ，DC ，1DD 所在直线为x ，y ，z 轴 建立空间直角坐标系．则()()111,0,0,0,1,0,,,022A C O ⎛⎫⎪⎝⎭，故()111,1,0AC AC ==-，()1,,0A P λλ=-，又()11,0,1A ，则()1,,1P λλ-，所以11,,122OP λλ⎛⎫=-- ⎪⎝⎭．在正方体1111ABCD A B C D -中，可知体对角线1B D ⊥平面11A BC ， 所以()11,1,1DB =是平面11A BC 的一个法向量，所以1222111122sin cos ,1113163222OP DB λλθλλλ⎛⎫⎛⎫-+-+ ⎪ ⎪⎝⎭⎝⎭===⎛⎫⎛⎫⎛⎫⨯-+-+-+ ⎪ ⎪ ⎪⎝⎭⎝⎭⎝⎭．所以当12λ=时，sin θ取得最大值33，当0λ=或1时，sin θ取得最小值23． 所以23sin ,33θ⎡⎤∈⎢⎥⎣⎦. 故选：A.二．多选题( 每小题5分，共20分 )9.给出以下命题，其中不正确的是（ ）A ．直线的方向向量为()0,1,1a =-，平面α的法向量为()1,1,1n =--，则⊥B ．平面、的法向量分别为()10,1,3=n ，()21,0,2=n ，则∥C ．平面经过三个点A (1，0，-1)，B (0，-1，0)，C (-1，2，0)，向量()1,,=n u t 是平面的法向量，则D ．直线的方向向量为()1,1,2a =-，直线的方向向量为12,1,2⎛⎫=- ⎪⎝⎭b ，则与垂直【解析】ABC因为0=⋅n a ，故αα⊂l l 或//，故选项A 错误；l l ααβαβαα1=+t u l m l m因为Rn n ∈≠λλ，21，所以两直线不平行，因此两平面不平行，故选项B 错误；设平面α的法向量为),,(t u x n =，因为35,34,31,1,0,122-11-1-=+===⎪⎩⎪⎨⎧=⋅=⋅==t u t u x n AC n AB AC AB 所以解得令则），，（），，，（，故C 选项错误因为0=⋅b a ，所以m l ⊥，故选项D 正确.10.一个正八面体，八个面分别标以数字1到8，任意抛掷一次这个正八面体，把它与地面接触的面上的数字记为X ，则{}1,2,3,4,5,6,7,8X ∈，定义事件：{}{}1,2,3,4A X X =∈，事件：{}{}1,5,6,7B X X =∈，事件：{}{}1,5,6,8C X X =∈，则下列判断正确的是（ ） A ．()1P A B +=B ．()38P BC =C ．()()()()P ABC P A P B P C =D ．A ，B ，C 两两相互独立【解析】BC87)(=+B A P ,A,B,C 两两不相互独立，显然.故选BC. 11．已知直线l ：()()121440m x m y m -+--+=和圆C ：22(2)(1)9x y -+-=，下列说法正确的是（ ） A ．直线l 恒过定点()4,0B ．圆C 被x轴截得的弦长为C ．直线被圆截得的弦长存在最大值，且最大值为4 D ．直线被圆截得的弦长存在最小值，且最小值为4【解析】AD由()()121440m x m y m -+--+=，得()2440m x y x y +---+=，联立24040x y x y +-=⎧⎨--+=⎩，得40x y =⎧⎨=⎩，无论m 为何值，直线l 恒过定点()4,0，故A 正确；在22(2)(1)9x y -+-=中，令0y =，得2x =±C 被x轴截得的弦长为B 错误； 当直线l 过圆心C (2,1)时，直线被圆截得的弦长最大，最大值为6，此时直线方程为122y x =-+，故C 错误；设(4,0)P ，易知P 在圆内，当直线l PC ⊥时，直线l 被圆截得的弦长最小，且最小值为4=，故D 正确. 故选：AD12．已知点P 是椭圆C ：22116x y +=上的动点，Q 是圆D ：()2211x y ++=上的动点，则（ ）A ．椭圆C 15B ．椭圆C 的短轴长为1C ．椭圆C 的右焦点为F ，则FQ 152D ．PQ 的最小值为2 【解析】AC在椭圆C ：22116x y +=中，长半轴长4a =，短半轴长1b =，半焦距2215c a b -，椭圆C 的离心率15e =，短轴长22b =，A 正确，B 不正确； 椭圆C 的右焦点为(15,0)F ，圆D 的圆心(1,0)D -，半径1r =，而点Q 在圆D 上，于是得max ||||152FQ FD r =+，C 正确；由2222(1)1116x y x y ⎧++=⎪⎨+=⎪⎩消去y 得22(1)16x x +=，解此方程得1244,53x x =-=-，因此，椭圆C 与圆D 有公共点，于是得PQ 的最小值为0，D 不正确. 故选：AC三．填空题（每小题5分，共20分）13.已知椭圆2214x y m +=的焦距等于2，则实数m 的值为 。
广西省贵港市桂平市第五中学2019-2020学年高二第七次周考历史试题 解析版
广西省贵港市桂平市第五中学2019-2020学年高二第七次周考历史试题一、单选题1．西周初年，分封的大国多在边远地区，如晋、齐、燕等国，远离周王室统治的中心地带。
这一布局旨在A．加强对外开疆拓土B．促进边远地区开发C．构筑边疆安全屏障D．防范异姓诸侯叛乱2．楚国是活跃在汉水和长江流域的一个国家。
楚国君主的心病是，在周朝的政治体系中他们的封号太低，与其强大的国力并不相称。
第六代楚君熊渠曾说：“我蛮夷也，不与中国之号谥。
”由此可知A．楚国在军事上已经具备问鼎中原的实力B．周楚两国征战给双方都带来深刻的影响C．楚国“不服周”的态度纯属夜郎自大D．商周沿袭而来的“天下观”在传播中受阻3．西周春秋时期，讲究、学习礼仪，从事国家治理活动是贵族世袭的特权。
孔子突破了“礼不下庶人”的限制，将周礼中用来调节统治阶级内部关系的礼延伸到老百姓，将只有统治阶级才有资格学习的礼传授给普通老百姓。
这A．扩大了统治的社会基础B．维护了社会等级秩序C．巩固了分封宗法制D．有助于突破世卿世禄制度4．春秋时期的著名商人范蠡指出：“贸易货物时，容易腐败变质的食用货物不要滞留，更不要囤积待贵。
”由此可知，他主张A．国家要加强食物安全监察B．食物商品应禁止进入市场C．市场秩序应得的法律规范D．商品贸易应该注重时效性5．下表是不同史籍关于汉代刺史的记载。
据此能够认定的历史史实是，汉代刺史记载出处“诏书旧典，刺史班宣，周行列国，省察治状，黜陟能否，断治冤狱，以六条问事，非条所问，即不省”《汉书》“武帝元丰五年，初分十三州，刺史假印绶，有常治所……到所部，郡国各谴一吏迎之界上，所察六条”《汉旧仪》“孝武之末，始置刺史，监纠非法，不过六条，传车周流，匪有定镇”《后汉书》A．位卑权重B．行使监察职责C．居无常所D．权限不断扩大6．1926年，王国维先生作《桐乡徐氏印谱序》指出，近代出土的兵器、陶器、玺印、货币等古物上的六国文字（见下图）与殷周的古文、秦国的文字和秦统一后的小篆不同，这实际是那时当地的通用文字。
2019-2020年高二上学期第七次周练 英语试题 含答案
2019-2020年高二上学期第七次周练英语试题含答案专项训练1：1. ___ poor at English, I'm afraid I can't make myself ___.A. To be; understandB. I'm ;to understandC. Being ;understandingD. Being; understood2. I have had my bike ___ ,and I'm going to have somebody ___ my radio tomorrow.A. repair; to repairB. repairing; to be repairedC. repaired; repairD. to repair; repairing3. You must get the work ___ before Friday.A. doB. to doC. doingD. done4. ___ the room, the nurse found the tape-recorder ___.A. Entering; stealingB. Entering; goneC. To have entered; being stolenD. Having entered; to be stolen5. We are pleased to see the problem ___ so quickly.A. settledB. having been settledC. be settledD. settling6. Mrs. Brown was much disappointed to see the washing machine she had had ____ went wrong again. (上海xx）A. itB. it repairedC. repairedD. to be repaired7. It is wise to have some money ___ for old age. (NMET1996)A. put awayB. keep upC. give awayD. laid up (put away 放好, 储存. . . 备用, 处理掉, 放弃, 抛弃)8. I don't want the children ___ out in such weather.A. takeB. to takeC. takenD. taking9. I'm afraid that I can't make myself ___ be cause of my poor English.A. understandB. understandingC. to understandD. understood10. The murderer was brought in, with his hands ___ behind his back.A. being tiedB. having tiedC. to be tiedD. tied (表动作完成）专项训练2：1. We found her greatly ___.A. improvingB. changedC. to helpD. having disturbed2. Jane got her bad tooth ___ at the dentist's.A. to put inB. pulled outC. pushed outD. drawing out3. When ____ ,the museum will be open to the public next year. (上海xx)A. pletedB. pletingC. being pletedD. to be pleted4. With a lot of difficulties ___ ,they went to the seashore and had a good rest.A. settledB. settlingC. to settleD. being settled5. The research is so designed that once ___ nothing can be done to change it. (NMETxx)A. beginsB. having begunC. beginningD. begun( once begun 在句中作状语，begin 为及物动词:“着手”）6. ___ ,they went home,___.A. Their work had been finished; singing and laughingB. They had finished their work; sang and laughedC. Their work finished; singing and laughingD. after their work finished; singing and laughing7. Before he came to London, he had never heard a single English word ___A. speakingB. speakC. spokenD. to speak8. ____ more attention, the trees could have grown better.A. GivenB. To giveC. GivingD. Having given9. ___ from space, the earth with water ___70％of its surface looks like a "blue blanket".A. Seen ;coveredB. Being seen; coversC. Seeing; coveringD. Seen; covering10. ____,the experiment will be successful.A. If carefully doingB. If it done carefullyC. If carefully doneD. If doing carefully11. The girl wrote a position without ___.A. askB. askingC. being askedD. to be asked12. He finished his homework and then went on ___me.A. helpingB. with helpC. with helpingD. to help13. ___where to go ,he asked a policeman.A. Having lost his way and not knowingB. Losing his way and didn't knowC. Having lost his way and didn't knowD. Lost his way and didn't know14. ____ her friend was badly hurt, she burst into tears.A. HearingB. Having heardC. To hearD. Heard15. ____ his team had won, his face lit up at once.A. KnowingB. When knowingC. After knowingD. When he knew专项训练3：1. They hurried back home only to find their house ___ into.A. breakB. to breakC. brokenD. breaking2. When he came to, he found himself ___ on a chair, with his hands ___ back.A. to sit; tiedB. sitting; tyingC. sat; tiedD. sitting; tied3. We do not feel ___ to enter modern buildings; everything about them seems unfriendly.A. invitedB. invitingC. to inviteD. to be invited(feel后加形容词，此处的invited 表主语we 的感受)4. I'm going to have my letters ____ tomorrow if I've got them ready by then.A. to typeB. typeC. typedD. typing5. Every great culture in the past had its own ideas of beauty ___ in art and literature.A. expressedB. to expressC. being expressedD. to be expressed答案：专项训练1：1-10 DCDBA CACDD专项训练2：:1-15 BBAAD DDADC CDDAD 专项训练3：:1-5 CDACA。
2021年高二下学期数学第7次周测试题 含答案
2021年高二下学期数学第7次周测试题含答案1．命题：“a 、b都是偶数，则a+b是偶数”的逆否命题是（）A．a 、b都不是偶数，则a+b不是偶数 B.a 、b不都是偶数，则a+b不是偶数C．a+b不是偶数，则a 、b都不是偶数 D.a+b不是偶数，则a 、b不都是偶数2．若方程x2+ky2=2表示焦点在y轴上的椭圆，则实数k的取值范围为（）A．（0，+∞）B．（0，2）C．（1，+∞） D．（0，1）3．过双曲线左焦点F1的弦AB长为6，则（F2为右焦点）的周长是（）A．28 B．22 C．14 D．124．已知A，B，C三点不共线，对平面ABC外的任一点O，下列条件中能确定点M与点A，B，C一定共面的是( )A. B.C. D.5．与双曲线有共同的渐近线，且过点（2，2）的双曲线方程为（）A． B．C．D．6．抛物线截直线所得弦长等于（）A． B． C． D．157．若点A的坐标为（3，2），为抛物线的焦点，点是抛物线上的一动点，则取得最小值时点的坐标是（）A．（0，0） B．（1，1） C．（2，2） D．8．椭圆上的点到直线的最大距离是（）A．3 B． C． D．9．如图，过抛物线的焦点F的直线交抛物线于A、B，交其准线于点C，若且,则此抛物线的方程为（）A． B． C． D．10．过点M（－2，0）的直线m与椭圆交于P1，P2，线段P1P2的中点为P，设直线m的斜率为k 1（），直线OP 的斜率为k 2，则k 1k 2的值为 （ ）A ．2B ．－2C ．D ．－11．若椭圆(a ＞b ＞0)的左、右焦点分别为F 1、F 2，线段F 1F 2被抛物线y 2=2bx 的焦点分成5∶3的两段，则此椭圆的离心率为（ ）A ．B ．C ．D ．12．过抛物线的焦点F 作一直线交抛物线于P ，Q 两点，若线段PF 与FQ 的长分别是，则=（ ）A ．B ．C ．D ．13．与椭圆4 x 2 + 9 y 2= 36 有相同的焦点,且过点(－3，２)的椭圆方程为______________．14．直线与双曲线相交于两点，则=_ _________________．15．过点且被点平分的双曲线的弦所在直线方程为 _.16．（本小题满分10分）已知圆与直线交于、两点，若线段的中点（1）求直线的方程；（2）求弦的长．17．（本小题满分12分）已知有两个不等的负根， 无实根，若p 、q 一真一假，求m 的取值范围。
2021年高二上学期数学第七周双休练习含答案
2021年高二上学期数学第七周双休练习含答案姓名 班级 成绩一、填空题：（每小题5分，共70分）1.经过点P （4，-2）的抛物线标准方程为2.过椭圆C ：的焦点引垂直于轴的弦，则弦长为3.过点（3，-2）且与有相同焦点的椭圆方程是4．椭圆 的焦点为，点P 在椭圆上，如果线段的中点M 在y 轴上，那么点M 的纵坐标是 5．双曲线的两条渐进线互相垂直，那么该双曲线的离心率是6．点Ｐ是椭圆上一点，以点Ｐ以及焦点为顶点的三角形的面积等于１，则点Ｐ的坐标为 7．P 是椭圆上的一点，F 1和F 2是焦点，若， 则的面积为 8.已知圆O ：，从这个圆上任意一点P 向y 轴作垂线段（在y 轴上），M 在直线上且，则动点M 的轨迹方程是9．抛物线y=x 2（a ≠0）的焦点坐标是10．抛物线上任一点与其焦点连线的中点的轨迹方程为11．过抛物线焦点F 的直线与抛物线相交于A 、B 两点，若A ，B 在抛物线准线上的射影是A 1，B 1，则∠A 1FB 1=12．已知抛物线y 2=x ，直线L 过点（0，1）且与抛物线只有一个公共点，则直线L 方程 是13.我们把离心率等于黄金比的椭圆称为“优美椭圆”。
设是优美椭圆，F 、A 分别是它的左焦点和右顶点，B 是它的短轴的一个端点，则∠ABF 等于 14．如图，已知是椭圆 的左、右焦点，点在椭圆上，线段与圆相切于点，且点为线段的中点，则椭圆的离心率为一中高二数学秋学期第七周双休练习答题卡1、__________________ 6、__________________ ________________2、__________________ 7、__________________ 12、________________3、__________________ 8、__________________ 13、________________4、_________________ 9、_________________ 14、________________5、_________________ 10、_________________二、解答题：本大题共6小题，共90分.写出必要的文字说明、证明过程或演算步骤. 15.(本小题满分14分)如图，A 、B 是椭圆x 2a 2＋y 2b2=1(a >b >0)的两个顶点，F 1P 为椭圆上一点，并且满足PF 1⊥OX ，OP ∥AB 。
钟祥一中高二(下)生物周练7
高二生物周练7（满分90分）1．下列关于基因工程和蛋白质过程的叙述错误的是①基因表达载体包括启动子、标记基因、复制远点、终止密码②采用反转录的方法得到的目的基因有启动子、终止子③用同种限制酶处理质粒和含目的基因的DNA，可产生相同的黏性末端而形成重组DNA分子④番茄的叶肉细胞可作为受体细胞⑤基因工程就是改造基因的分子结构，蛋白质工程就是改造蛋白质的分子结构⑥基因工程能创造出自然界根本不存在的基因，蛋白质工程能创造出自然界根本不存在的蛋白质⑦基因工程和蛋白质过程都是分子水平上的操作A．①②⑤⑥B．①②④⑤⑥C．②③④⑤D．①②④⑥⑦2．目前科学家把兔子血红蛋白基因导入大肠杆菌细胞中，在大肠杆菌细胞中合成了兔子的血红蛋白，下列哪一项不是这一先进技术的理论依据()A．所有生物共用一套遗传密码B．基因能控制蛋白质的合成C．兔子血红蛋白基因与大肠杆菌的DNA都是由四种脱氧核苷酸构成，都遵循相同的碱基互补配对原则D．兔子与大肠杆菌有共同的原始祖先3．在基因工程技术中，需要用氯化钙处理的步骤是()A．目的基因的提取B．目的基因与载体结合C．将目的基因导入受体细胞D．目的基因的检测与表达4．日本下村修、美国沙尔菲和钱永健因在发现绿色荧光蛋白(GFP)等研究方面作出突出贡献，获得2008年度诺贝尔化学奖。
GFP在紫外光的照射下会发出绿色荧光。
依据GFP的特性，你认为该蛋白在生物工程中的应用价值是()A．作为标记基因，研究基因的表达B．作为标记蛋白，研究细胞的转移C．注入肌肉细胞，繁殖发光小白鼠D．标记噬菌体外壳，示踪DNA路径5．如果科学家通过转基因工程，成功地把一位女性血友病患者的造血干细胞进行改造，使其凝血功能恢复正常。
那么，她后来所生的儿子中()A．全部正常B．一半正常C．全部有病D．不能确定6．猪的胰岛素用于人体时降血糖效果不明显，原因是猪胰岛素分子中有一个氨基酸与人的不同。
为了使猪胰岛素用于治疗人类糖尿病，用蛋白质工程的蛋白质分子设计的最佳方案是A．根据人的胰岛素设计制造一种全新的胰岛素B．将猪胰岛素和人胰岛素进行拼接组成新的胰岛素C．将猪和人的胰岛素混合在一起治疗糖尿病D．对猪胰岛素进行一个氨基酸的替换7．下列对愈伤组织的叙述，不正确的是()A．是高度液泡化的、呈无定形状态的一群薄壁细胞B．是失去分裂能力、高度分化的一群细胞C．既有分裂能力又有分化能力的一群细胞D．具有发育成一个完整植物体的潜能8．下列关于植物细胞工程的叙述，正确的是()A．叶肉细胞离体培养时，可以表现出全能性B．叶肉细胞经再分化过程可形成愈伤组织C．融合植物叶肉细胞时，应先去掉细胞膜D．叶肉细胞脱分化后可形成具有一定形状的薄壁细胞9．下列关于植物组织培养技术产生新个体的叙述错误的是()A．属于无性生殖B．主要理论依据是植物细胞具有全能性C．培养过程中由于人工培养基含大量营养，不需光照就能发育成完整植株D．人工培养基中含植物生长发育所需的全部营养物质，包括矿质元素、糖、维生素等10．植物细胞工程常采用的技术手段有植物组织培养和植物体细胞杂交等。
高二上学期英语第七次周练
2014年高二上学期第七次英语周练（11－28）命题人：吴聪第一节阅读理解（共4小题；每小题2分，满分8分）APeople have always been wondering about what our future will look like. Go on reading this text, and you will know what will happen in the next fifty years.How can we know what the future will look like? To be able to understand the future, you must know the past. What has taken us to where we are today and what has changed along the way? The world has changed a lot in the last 150 years, but we humans are driven by the same basic needs as we were 150 years ago. Will this change in the next 150 years? No.What inventions have really made a difference in the last 150 years? In the past years, the inventions that have affected most people around the world for everyday living are the telephone, electricity, radio, television, computer, the car and the ability to communicate through the Internet. Then we of course have a lot of inventions that have made life easier, like new medicine, faster transports etc. In general, human beings have been working hard in the last 150 years to make the inventions so that they will be able to get control of the time and the world. Since there is still much to do in this area, this will be the focus at least for the next 150 years.Why do we need to predict the future? Predicting the future is important for two reasons first we need to start to think about what kind of future we would like for ourselves and to pass on to the next generation, and then we need to know what decisions we need to make today that will give the best result in the future.1. What does the author try to tell us in the second paragraph?A. The world is quite different from what it was.B. Our basic needs will not change in the future.C. Humans will no longer enjoy food in the future.D. The world will be completely changed tomorrow.2. Our past inventions have made .A. it easy for us to liveB. our daily life more stressfulC. our work easily doneD. us work less time3. What will humans do in order to keep the world under control?A. To produce more cars for transportation.B. To focus on making more inventions.C. To work much harder to achieve their goals.D. To spend more time working on the Internet.4. What is the main idea of the last paragraph?A. What result we’ll receive in the futrue.B. The decisions we make for our future.C. The importance of predicting the future.D. The two reasons of predicting the future.第二节（共5小题；每小题2分，满分10分）根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。
高二四川省雅安市天全中学高二上学期第7周周考语文
天全中学2015—2016学年上期高二第7周周考语文试题班级：姓名：成绩：一．基础知识（9分，每小题3分）1下列有关文学常识的表述，不正确．．．的一项是( )A．厄纳斯特·海明威，英国现代作家。
1954年获诺贝尔文学奖。
代表作有《老人与海》《太阳照样升起》《永别了，武器》《丧钟为谁而鸣》等。
B．李白，字太白，号青莲居士，盛唐诗坛的代表作家之一，是我国文学史上继屈原之后又一伟大的浪漫主义诗人，存诗九百九十余首。
其诗风格飘逸、豪放。
C．《祝福》以一个淳朴善良的农村妇女为主角，把人物放在一个复杂的社会关系里，通过对祥林嫂的塑造，为劳动妇女的悲惨命运提出强烈的控诉。
D．杜甫，字子美，他的诗，反映了唐代动乱的现实，揭示了人民的痛苦生活，称为“诗史”。
在艺术上，为古代诗歌开辟了现实主义广阔道路，创建了沉郁顿挫的艺术风格。
2．下列语句中，标点使用正确的一项是（）A．我在路上遇到不少人，可他们都不知道前面是何处？前面是否有旅店？B．他把汽车开得那么快，我敢从驾驶室爬到后面去吗？于是我就说：“算了吧。
”C．我已经上了年纪，不能拿棍子把鲨鱼给打死。
但是，只要我有桨、有短棍、有舵把，我一定要想法去揍死它们。
D．“啊，”他说，“我照旧是个老头儿。
不过我不是赤手空拳罢了”。
3．列句子中句意明确，没有语病的一句是（）A．在张大爷住院治疗一段时间后，感到体力和思维都大不如以前了。
B．蔡校长说：“李虎对张林的批评是有充分准备的，我相信他们会处理好这件事。
”C．“低保政策”体现了党和政府对困难群众的关爱，但要把关爱落到实处，却远不是划几条标准那么简单。
D．山东大学积极采取措施，培养新入校的大学生，力争在较短时间内解决史学界后继乏人的状况。
二下面是一则有关“五丁开山”传说（13分）五丁开山蜀国弱，然道难，秦强收不能得之。
秦王诈，责匠凿五牛，朝坠金于其后，曰：牛便金。
许于蜀。
蜀王贪，欲五牛。
时蜀有五力士，千斤力，无人敌。
王遣五丁开山迎牛。
2012-2013学年高二下学期英语周末辅导试卷(第7周)Unit 4 Sharing
2012-2013学年高二下学期英语复习题（第07周）姓名：______________ 成绩：_______________Unit 4 Sharing一、定语从句一般由关系代词和关系副词引导1、关系代词：who, whom, whose, which, that, as2、关系副词：when, where, why3、关系代词和关系副词的用法：指出关系代词（副词）在定语从句中的成份：1.The man (who) came to our school is Mr. Wang.( )2.The girl (whom) I met is Lucy. ( )3.A child (whose) parents are dead is called Tom. ( )4.I like the book (which) you bought yesterday. ( )5. His parents wouldn’t let him marry anyone (whose) family was poor. ( )6. We shall never forget the days (that) we spent together. ( )二、限制性定语从句与非限制性定语从句1、限制性定语从句：从句与主句关系密切，去掉从句，主句意义不完整，甚至不合逻辑。
e.g. I was the only person in our office who was invited.（去掉定语从句，意思就不完整）2、非限制性定语从句：从句对先行词关系不密切，去掉定从句，意思仍然完整。
形式上用逗号隔开，不能that用引导。
e.g. Tom’s father, who is over sixty, still works hard day and night.（who引导非限制性定语从句，整个句子可分成两句来翻译）三、使用定语从句时特别注意的几个问题1、that与which的区别。
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肇庆一中高二第7周周末练
直线的方程
一、选择题
1．直线123
x y -=-在y 轴上的截距是 A ．2 B ．3 C ．2- D ．3-
2．已知直线l 过点(1,0)M -，并且斜率为1，则直线l 的方程是
A ．10x y ++=
B ．10x y -+=
C ．10x y +-=
D ．10x y --=
3．直线l 过(,)a b 、(,)b a 两点，其中a 与b 不相等，则
A ．l 与x 轴垂直
B ．l 与y 轴垂直
C ．l 过一、二、三象限
D ．l 的倾斜角为
34
π 4．在ABC ∆中，点(4,1)A -，AB 的中点为(3,2)M ，重心为(4,2)P ，则边BC 的长为
A ．5
B ．4
C ．10
D ．8
5.如果两直线(1)2x m y m ++=-，280mx y ++=重合，则
A ．1m =
B ．2m =
C ．1m =或2m =-
D ．2m =-
6．下列各方程表示的图形是一条直线的是
A ．lg lg 1x y -=
B 1=
C ．tan()1x y -=（0x y π<-<）
D ．22
1x y x y -=+ 7．一直线在y 轴上的截距为10，且原点到它的距离为8，其方程为
A ．43400x y --=
B ．34400x y -+=
C ．45400x y +-=
D ．54400x y --=
8．对于直线90x y a +-=（0a ≠），以下结论正确的是
A ．恒过定点，且斜率和纵截距相等，
B ．恒过定点，且横截距恒为定值，
C ．恒过定点，且为不与x 轴垂直的直线，
D ．恒过定点，且与x 轴平行的直线
9．若方程0Ax By C ++=表示直线，则必然有
A ．A 、
B 、
C 不全为0 B ．A 、B 不全为0 C ．A 、B 、C 都不为0
D ．A 、B 都不为0
10．如果方程0Ax By C ++=表示的直线是y 轴，则系数A 、B 、C 满足
A ．0BC =
B ．0A ≠
C ．0BC =且0A ≠
D ．0A ≠且0B C ==
11．已知直线1l 的方程为30Ax y C ++=，直线2l 的方程为2340x y -+=，若1l 、2l 的交点在y 轴上，则C 的值为
A ．4
B ．4-
C ．4±
D ．与A 有关
12．两条直线230x y m +-=和120x my -+=的交点在x 轴上，那么m 的值是
A ．24
B ．6
C ．24-
D ．6-
A ．直线0Ax By C ++=有横截距
B ．直线0Ax By
C ++=有纵截距
C ．直线0Ax By C ++=既有横截距又有纵截距
D ．以上都不正确
14．若方程0Ax By C ++=表示与两条坐标轴都相交的直线，则
A ．000A
B
C ≠⎧⎪≠⎨⎪≠⎩
B ．00A B ≠⎧⎨≠⎩
C ．00B C ≠⎧⎨≠⎩
D ．00A C ≠⎧⎨≠⎩ 15．两条直线0nx my mn --=与0mx ny mn --=(0m ≠，0n ≠)的图形可能是下图中的
16．过11(,)x y 和22(,)x y 两点的直线的方程是
A ．112121y y x x y y x x --=--
B ．112112
y y x x y y x x --=-- C ．211211()()()()0y y x x x x y y -----= D ．211211()()()()0x x x x y y y y -----=
17．直线0ax by c ++=（0ab ≠）在两坐标轴上的截距相等，则a 、b 、c 满足的条件是
A ．a b =
B ．a b ||=||
C ．a b =且0c =
D ．0c =或0c ≠且a b =
18．若直线l 的横截距与纵截距都是负数，则
A ．l 的倾斜角为锐角且不过第二象限
B ．l 的倾斜角为钝角且不过第一象限
C ．l 的倾斜角为锐角且不过第四象限
D ．l 的倾斜角为钝角且不过第三象限
19．直线1ax by +=（0ab ≠）与两坐标轴围成的面积是
A ．12ab
B ．12ab ||
C ．12ab
D ．12ab || 20．过点(5,2)，且在x 轴上的截距（直线与x 轴交点的横坐标）是在y 轴上的截距的2倍的直线方程是
A ．2120x y +-=
B ．2120x y +-=或250x y -=
C ．210x y --=
D ．290x y +-=或250x y -=
21．集合{}A =直线的斜截式方程，集合{}B =一次函数的解析式，则集合A 、B 间的关系是
A ．A
B = B ．A B ⊃
C ．B A ⊃
D ．以上都不对
22．直线3260x y ++=的斜率为k ，在y 轴上的截距为b ,则有
A ．32k =-
,3b = B ．32k =-,2b =- C ．32k =-,3b =- D ．32k =-,2b = 二、填空题
1．已知(3,)P m 在过(2,1)M -和(3,4)N -的直线上，则m 的值是 。
2．纵截距为4-,与两坐标轴围成三角形的面积为20的直线的一般式方程为 。
3．一根铁棒在030C 时长10.508m ，在060C 时长10.514m ，已知长度1（m ）和温度0t C 的关系可以用直线方程来表示，则这根铁棒在090C 时的长度为 ，当铁棒长为10.511m 时的温度是 。
4．将直线2)y x =-绕点(2,0)按顺时针方向旋转030所得直线的方程
是 。
5．某房地产公司要在荒地ABCDE (如图所示)上划出一块长方形地面(不改变
方位)建造一幢8层楼公寓，问如何设计才能使公寓占地面积最大?并求出最大
面积(精确到21m )。
三、解答题
1．过原点作一条直线，使它与直线120x y -+=，290x y ++=围成的三角形面积为
32
面积单位，求这条直线的方程。
2．求经过(3,4)P -，且横纵截距相等的直线方程.
3．求过直线4210x y --=与直线250x y -+=的交点且与两点1(0,4)P 、
2(2,0)P 距离相等的直线方程。
4．已知直线l 在y 轴上的截距为3-,且它与两坐标轴围成的三角形的面积为6，求直线l 的方程。
5．ABC ∆的三个顶点为(0,4)A 、(2,6)B -、(8,2)C ，求此三角形各边上中线所在直线的方程。
6．直线l 过点(1,2)和第一、二、四象限，若直线l 的横截距与纵截距之和为6，求直线l 的方程。
7．已知直线l ：4y x =和点(6,4)P ，在直线l 上求一点Q ，使过PQ 的直线与直线l 及x 轴在第一象限内围成的三角形的面积最小。
8．ABC ∆的顶点(3,4)B ，AB 边上的高CE 所在直线方程为23160x y +-=，BC 边上的中线AD 所在直线方程为2310x y -+=，求AC 的长。
9．一直线被两直线1l ：460x y ++=，2l ：3560x y --=截得的线段的中点恰好是坐标原点，求该直线方程。
10．一根弹簧，挂5公斤的物体时，长10cm ，挂8公斤的物体时长16cm ，已知弹簧长度1cm 和所挂物体的重量W (公斤)的关系可以用直线方程来表示，用两点式表示这个方程，并且根据这个方程，求弹簧长为12cm 时所挂物体的重量。
11．若m R ∈，则直线(21)(3)(11)0m x m y m -++--=是否恒过定点，若过请求出定点的坐标.若不过，请说明理由。
12．已知过原点O 的一条直线与函数8log y x =的图象交于A 、B 两点，分别过点A 、B 作y 轴的平行线与函数2log y x =的图象交于C 、D 两点。
(1)求证点C 、D 和原点O 在同一条直线上；
(2)当BC 平行于x 轴时，求点A 的坐标。
肇庆一中高二第7周周末练答案
一、选择题
1．B 2．B 3．D 4．A 5．D 6．C 7．B 8．C 9．B
10．D 11．B 12．C 13．D 14．B 15．C 16．C 17．D
18．B 19．D 20．D 21．B 22．C
二、填空题
1．2- 2．25200x y --=或25200x y ++= 3．10.52m ；045C 4．2x =
5．50(5,)3
P ,26017m 三、解答题 1．所求的直线方程为2325y x =-或12y x =- 2．43
y x =- 10x y ++= 3．3210x y -+=和42150x y +-=
4．334
y x =±- 5．3140x y +-=，2100x y +-=，4y =
6．240x y +-=和30x y +-=
7．(2,8)Q
8．AC ||=
9．直线l 的方程为60x y +=
10．弹簧长为12cm 时所挂物体的重量为6公斤
11．过定点(2,3)
12．A 坐标为8。