高二下第三周周末练习

110A ={x | y = log 2 x, y € Z},B ={x ^ N+|x 兰 9}AR B =A. p qB._p qC.2 二4.y =1 - 2si n (x)12JI兀A.— B.—365. (X -1)(x-2)=0x-1=0 A. B.C.6. y = x sin |x|,x二］_p qD.p qy = sin 2xJIJIC. —D. —36D.2.z (—1+3i)z=2(1+i) izA. B.C.D.3.2p : T X 0 R, X 0-2X 03 _0- 2-x = R,x - 2x 3 02 2x y =1— + 3 (3,0),7 16A.{1,2,3,4}B.{2,4,6,8}C.{1,2,4,8}D.{2,4,8}q：1.7.3, a+b 23.6 2A.-B. C. D.28.A. e 30 {a n }In 印 In a 2 In a 3 In a n3n ,「、....(n N )369 3n 2a 10 =9.100B. e 3C.e 3D. 40ex,yx-y+1 _0,x+2y+1 - 0 ,2x+y-1 - 0,1:2k=()y=k(x+1)高中数学11. 设P 为曲线f(x)=x 3+X -2上的点,且曲线在P 处的切线平行于直线y=4x-1,则P 点的坐标 为( )A . (1,0)B . (2,8)C. (1,0)或(-1,-4)D. (2,8)或(-1,-4)2 212. 已知双曲线 G 二-与=1(a0,b 0)的右焦点为抛物线 C 2：y 2=2px 的焦点F ,且点a bF 到双曲线的一条渐近线的距离为 .,3，若双曲线G 与抛物线C 2在第一象限内的交点为P(X 0,2；6)，则该双曲线的离心率等于()A.、、2B.2C.,3 D. 1.2二、 填空题：13. 在 MBC 中，B=120°, AC=7 AB=5 贝U MBC 的面积为 ___________________ 「x + 2 x 兰 014. 已知函数f(x)=Z ' ，则不等式f(x)3x 2的解集是I-x+2,x 〉015. 已知数列｛a n ｝的通项公式是a n =2n-48，则当其前n 项之和最小时n 的取值是 ________________2x16. 已知函数f (x) x ,若对任意的X 1,X 2，［-1,2］的恒有af(1)- f(xJ-f(X 2)成立，则e实数a 的取值范围是 ______________________ 三、 解答题：(1)求B(2)求 ABC 面积的最大值1 1 丄丄C.丄D.-4 3 2410.在 ABC 中， 有正弦定理：abc 定值，这个定值就是ABC 的外接sin A sin BsinC圆的直径.如图2所示，；DEF 中，已知DE = DF ，点M 在直线EF 上从左到右运动(点M 不与E 、F 重合)，对于M 的每一个位置，记 ：DEM 的外接圆面积与 面积的比值为，，那么.DMF 的外接圆DDDM EF EM FEF M(A ) ■先变小再变大C ) ■先变大再变小(B )仅当M 为线段EF 的中点时，■取得最大值(D )-是一个定值17.已知在 ABC 中，角A 、B 、C 的对边分别为a,b,c,右 22 2ab -c _22~2ac -b2sin A - sin Csin Cb=4.6x 2 2 2 218.已知命题p：方程—y—= 1表示焦点在y上的椭圆；命题q: y- —= 1离心率的2m 9—m 5 m高中数学p,q19.{a n } Sn+a n=2 n+1S n {a n }n1{a n }22 2F 1 -1,0 F 2 1,021.C:二 2 =1(a b 0) a b1 C 2F 2C ABAABF 1320.P ABCD ABCD 4 BAD=60PAD_PA=PD= 13 MN BC PA1 BNPDM 2 PAB PCDABCD1 22.f(x)=al nx —(a+1)x —— 1 a<-1f(x)2 x1g(x)=—x ——一1x>1g(x)f(x)a=1.6x1-6.CDDDBC 7-12.BBADCB 13. ^5-^ 14.[-1,1] 15.23 或 24 16. a_e ?417. (1) 60°( 2) 4J3 18. (0,-RJ[3,5) 19.略 20.(1)略(2) 60°221. （1） 2x 2 3y 2 =6 （2）-31 122. （1）当-2<a<-1时，f （x ）在（0,1）上递增，在（1, ）上递减，在（ ，•：：）递增；a+1a+1当a=-2时，在（0,址）上递增；当a<-2时，在（0, _^L ）上递增，在递减，在（1,垃） 'a+1 a+1，上递增（2）略。

英语第一部分阅读理解（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）2019-2020年高二下学期第三次周练英语试题含答案It all started off with five. It was raining, and my dad told me that I had to make five free throws(投球) one after another without a break before I could go home.I was ten years old at that time. So I shot(投球) until I indeed made five free throws. Pretty soon the number of free throws increased until I got to high school and I had to make seventy-five before I could leave the gym.I used to get mad when I reached the required amount and I would miss the next one, but my dad made me start over, saying that I missed it on purpose. So in high school I would usually get to 120 before I stopped. My highest ever was 175. I never expected this would ever bring me some benefit, but one game really changed my idea.Our school team was playing basketball match with Royal High School, and we lost the game by twenty points a week earlier, so this game was all about revenge (报仇). With two minutes left in the game, my team was up by six and their coach told them to foul (犯规). Our coach immediately put forward a perfect plan — giving the ball to me every time. And every time my teammates gave me the ball, the other team would foul me. Then I went to the free throw line and made two free throws successfully.I ended up going ten-for-ten that game all in the last two minutes. The final score was 57-50 and we won.1. We can learn from the first two paragraphs that .A. the author’s father was very strict with himB. the author’s father wanted him to create a recordC. the author had to make five free throws every dayD. the author could make 75 free throws at the age of 102. How many times was the author fouled?A. Ten.B. Seven.C. Six.D. Five.3. What can we learn from the text?A. The author could make fifty free throws within two minutes.B. The author’s hard work brought a good result in the game.C. The author’s coach didn’t know the author had the talent.D. Royal High School team was stronger than the author’s t eam.BHaving attended a first-aid-at-work course, Brian Cracknell soon found himself responding to two emergencies in a week.Brian was at work in his bus pany office in Weston-super-Mare on May 18 when a colleague called to say there had been an accident at a bus stop nearby. He ran to the scene with his first aid kit and found an old lady sitting at the bus stop. When boarding(上车) the bus, the old lady painfully hurt her left leg, which was bleeding.He introduced himself, and asked some basic first aid questions to get a general picture of her health. Then he put his jacket on the floor, using the lady’s coat as a pillow, and gently laid her down so he could raise her legs and apply some bandages. Bryan said, “At first I was a bit worried about remembe ring to do all the right things.I made sure she was as fortable as possible.” When he had nearly finished, he told the lady that she was his first one. The lady said he was doing a great job.Just a week later, Brian got a second call-out to help another lady at a bus stop.Having used his new skills twice within a short time, Brian has decided to sign up as a Red Cross first aid volunteer. As he said, “I just thought: what’s the point in having this knowledge if I’m not going to use it? It felt really go od to help those people. I was so proud of myself afterwards, so I’m going to join the Red Cross.”4. Before helping the old lady, Brian ..A. had given first aid on many peopleB. was thought to be a skilled first aid volunteerC. knew nothing about how to handle an emergencyD. had learnt first aid skills but hadn’t put them into practice5. What was wrong with the old lady when Brian arrived?A. Her legs were bleeding after being injured.B. Her left leg was injured and was bleeding.C. She fell onto the ground and hurt her head.D. She was knocked down by a bus and lost her legs.6. What does Paragraph 3 mainly tell us?A. The reason why Brian was asked to help.B. Brian handled two emergencies in a week.C. How Brian gave first aid on the old lady.D. How the old lady reacted to Brian’s performance.7. After using his first aid skills twice, Brian .A. was discouraged and decided to give upB. realized he still had a lot of things to learnC. decided to give up his job for the Red CrossD. decided to help more people with his first aid skillsCA Japanese pany has ordered all of its 2,700 employees to get identical (一模一样的) hairstyles. For men, the preferred cut is short on the sides and back but longer on top. For women, the pany prefers a bob with a longer fringe (刘海) that can be swept to one side. This unusual request is its effort to help the country save energy.The spokeswoman for the Tokyo-based construction firm Maeda Corporation Chizuru Inoue explained, “Our pany is eager to protect the environment and we encourage our staff to carry out many environment-friendly actions.”She added, “We are not sure of the data yet, but we believe if people have short hair, they do not need to use their hair driers for so long and they will use less water. If all our employees do this, then we may save a lot of power.” Some staff are confused about which style they must have and have been asking which salons (美容院) give the best cut.The energy-saving move is part of a national campaign to reduce energy consumption (消耗) following the Fukushima nuclear disaster. Japan has been struggling to produce enough electricity since the tsunami ended production at the Fukushima plants. The disaster resulted in a r eview of the country’s energy policy that now means less than a quarter of its remaining nuclear plants are in use. The government has talked about a move away from nuclear energy towards more sustainable(能持续的) technologies. Many government departments have taken measures to save power, including a reduced use of air conditioning in offices and schools. Many employees cannot turn down the air conditioner below 27 degrees in the hottest summer months.8. The pany gave the order of hairstyles to .A. keep the pany offices cleanB. show a good image of the businessC. make the staff look tidy and prettyD. help reduce energy consumption9. After the Fukushima nuclear disaster, Japan .A. is building more nuclear plantsB. has to rethink its energy policyC. limits people’s daily energy useD. decides to close old nuclear plants10. It can be inferred from the text that .A. nuclear power forms 1/4 of Japan’s energyB. nuclear plants will soon disappear in JapanC. the pany is not alone in saving energyD. other panies have copied the “hairstyle order”11. What would be the best title for the text?A. Sustainable power is wele in JapanB. Nuclear disaster brings bad resultsC. Short hairstyles may help save energyD. Japan is lacking in energyDIt turns out that nodding off(睡觉) in class may not be a bad idea, as a new study has shown that going to sleep shortly after learning new materials is the best way to remember them.According to US lead author Jessica Payne, a psychologist at the University of Notre Dame in Indiana, nodding off after learning something new is like “telling” the sleeping brain what to remember. Along with colleagues, she studied 207 students who slept for at least six hours per night. Students were randomly (随机地) assigned to study something declarative (陈述的) at 9 am or 9 pm, and returned for testing 30 minutes, 12 hours or 24 hours later.Declarative memory refers to the ability to consciously(有意识地) remember facts and events, and can be divided into memory for events and memory for facts about the world. People use both types of memory every day — remembering where they parked today or learning how a colleague prefers to be called.At the 12-hour retest, memory was better following a night of sleep pared to a day of wakefulness (不眠). At the 24-hour retest, with all students having received both a full night of sleep and a full day of wakefulness, students’ memories were greater when sleep happened shortly after learning rather than following a full day of wakefulness.“Our study confirms that sleeping directly after learning something new is beneficial for memory. What’s special for this study is that we have shown sleep’s influence on declarative memory,” Payne said. “Since we found that sleeping soon after learning benefited both types of memory, this means that it would be a good thing to go over any information you need to remember before going to bed. In some sense, you may be telling the sleeping brain what to consolidate (巩固).”12. What’s the main idea of the text?A. How to improve one’s memory is a difficult problem.B. Nodding off after learning something new helps remember it.C. Students should nod off in class after they learn new materials.D. The best way to remember new materials is to nod off in class.13. We can learn about the study that .A. Jessica Payne and her colleagues were testedB. 207 students were eager to take the testC. it tested students studying something declarativeD. people’s memory can be divided into two types14. Paragraph 4 mainly tells us .A. students’ memories are the best if they sleep for 12 hours each dayB. sleeping for 24 hours contributes to improving students’ memoriesC. a full day of wak efulness can make students’ memories improved greatlyD. students’ memories are better when sleep happens shortly after learning15. What suggestion does Payne give in the last paragraph?A. The more you sleep, the more you remember.B. Go over what you want to remember before going to bed.C. Teachers should allow their students to sleep in class.D. If you want to improve your memory, you should sleep.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。

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江西省上饶市横峰县2016-2017学年高二数学下学期第三周周练试题 理一、选择题1、函数2ln ||()x f x x x=+的大致图象为（ )2、定义在R 上的函数()f x 满足：'()1()f x f x >-，(0)6f =，'()f x 是()f x 的导函数,则不等式()5x x e f x e >+（其中e 为自然对数的底数)的解集为（ ）A ．(0,)+∞B ．(,0)(3,)-∞+∞C ．(,0)(1,)-∞+∞D ．(3,)+∞3、已知R a ∈,若xe x a x xf )()(+=在区间（0，1）上只有一个极值点，则a 的取值范围为（ ）A ．0>aB ．1≤aC ．1>aD ．0≤a二、填空题4、已知函数()()3261f x x mx m x =++++既存在极大值又存在极小值，则实数m 的取值范围是 ．5、若曲线x x x f ln 21)(2+-=在其定义域内的一个子区间)2,2(+-k k 内不是单调函数，则实数k 的取值范围是______.三、解答题6、设函数()()8613223+++-=ax x a x x f ，其中R a ∈．已知()x f 在3=x 处取得极值．（1)求()x f 的解析式;(2)求()x f 在点A(1，16)处的切线方程．7、已知x a x x x f +-+=42)(2.(1）若4=a ，求)(x f 的单调区间；（2）若)(x f 有三个零点，求a 的取值范围.8、已知函数()()212g x f x x bx =+-，函数()ln f x x a x =+在1x =处的切线l 与直线20x y +=垂直．（Ⅰ）求实数a 的值；（Ⅱ）若函数()g x 存在单调递减区间，求实数b 的取值范围; （Ⅲ）设()1212x x x x <，是函数()g x 的两个极值点，若72b ≥，求()()12g x g x -的最小值．参考答案一、单项选择1、D2、A3、A 二、填空题4、【答案】36m m <->或【解析】原命题等价于()()23260f x x mx m =+++=有两个解2412(6)0m m ⇒=-+>⇒36m m <->或．． 5、【答案】32<<k【解析】x x x f ln 21)(2+-=的定义域为()0,+∞,由(2,2)k k -+⊆()0,+∞得2k >,因为x x x f ln 21)(2+-=,所以()()()21111'x x x f x x x x x -+-=-+==，因为0x >,所以由()'0f x >得()f x 在()0,1上递增，由()'0f x <得()f x 在()1,+∞上递减，所以1x =是函数的极小值点，要使曲线x x x f ln 21)(2+-=在区间)2,2(+-k k 内不是单调函数，则函数在)2,2(+-k k 必有极值点,因为函数在定义域内只有一个极值点1x =,所以必有21212k k k -<⎧⎪+>⎨⎪>⎩，得32<<k ,故答案为32<<k 。

高二年级英语周考试题I.阅读ACold weather can be hard on pets, just like it can be hard on people. Sometimes owners forget that their cats are just as used to the warm shelter (住所) as they are. Some owners will leave their animals outside for a long period of time, thinking that all animals are used to living outdoors. This can put their pets in danger of serious illness. There are things you can do to keep your animal warm and safe.Keep your pets inside as much as you can when the weather is bad. If you have to take them out, stay outside with them. When you’re cold enough to go inside, they probably are too. If you must leave them outside for a long time, make sure they have a warm, solid shelter against the wind, thick bedding, and plenty of non-frozen water.If left alone outside, dogs and cats can be very smart in their search for warm shelter. They can dig into snow banks or hide somewhere. Watch them closely when they are left outdoors, and provide them with shelter of good quality. Keep an eye on your pet’s water. Sometimes owners don’t realize that a water bowl has frozen and their pet can’t get anything to drink. Animalsthat don’t have clean and unfrozen water may drink dirty water outside, which may contain something unhealthy for them.1. What do we learn about pets from Paragraph 1?A. They are often forgotten by their owners.B. They are used to living outdoors.C. They build their own shelter.D. They like to stay in warm places.2. Why are pet owners asked to stay with their pets when they are out in coldweather?A. To know when to bring them inside.B. To keep them from eating bad food.C. To help them find shelters.D. To keep them company.3. If pets are left on their own outdoors in cold weather, they may ___.A. run short of clean waterB. dig deep holes for funC. dirty the snow nearbyD. get lost in the wild4. What is the purpose of this text?A. To solve a problem.B. To give practical advice.C. To tell an interesting story.D. To present a research result.BYou may think that sailing is a difficult sport, but it is really not hard to learn it. You do not need to be strong. But you need to be quick. And you need to understand a few basic rules about the wind.First, you must ask your self, “Where is the wind coming from? Is it coming from ahead or behind or from the side?〞 You must think about this all the time on the boat. The wind direction tells you what to do with the sail.Let’s start with the wind blowing from the behind. This me ans the wind and the boat are going in the same direction. Then you must always keep the sail outside the boat. It should be at a 90° angle (角度) to the boat. Then it will catch the wind best.If the wind is blowing from the side, it is blowing across the boat. In this case, you must keep the sail half way outside the boat. It should be at a 45° angle to the boat. It needs to be out far enough to catch the wind, but it shouldn’t flap (摆动). It shouldn’t look like on a flagpole. If it is flapping, it is probably out too far, and the boat will slow down.Sailing into the wind is not possible. If you try, the sail will flap and the boat will stop. You may want to go in that direction. It is possible, but you can’t go in a straight line. You must go first in one d irection and thenin another. This is called tacking. When you are tacking, you must always keep the sail inside the boat.5. What should you consider first whilesailing?A. Sailors’ strength.B. Wave levels.C. Wind directions.D. Size of sails.6. What does the word “It〞underlined in Paragraph 4 refer to?A. The boat.B. The wind.C. The sail.D. The angle.7. What do you have to do when sailing against the wind?A. Move in a straight line.B. Allow the sail to flap.C. Lower the sail.D. Tack the boat.8. Where can you probably find the text?A. In a popular magazine.B. In a tourist guidebook.C. In physics textbook.D. In an official report.CMoney MattersParents should help their children understand money. 11 So you may start talking about money when your child shows an interest in buying things, candy or toys, for example.1.The basic function of moneyBegin explaining the basic function of money by showing how people trade money for goods or services. It is important to show your child how money is traded for the things he wants to have. If he wants to have a toy, give him the money and let him hand the money to the cashier(收银员). 12 When your child grows a bit older and understands the basic function of money, you can start explaining more complex ways of using money.2.Money lessonsApproach money lessons with openness and honesty. 13 If you must say no to a child’s request to spend money, explain, “ You have enough toy trucks for now.〞 Or, if the request is for many different things, s ay, “ You have to make a choice between this toy and that toy.〞3.14Begin at the grocery store. Pick out two similar brands of a product--- a name-brand butter and a generic (无商标产品)，for example. You can show your child how to make choices between different brands of a product so that you can save money. 15 If he chooses the cheaper brand, allow him to make another purchase with the money saved. Later, you may explain how the more expensive choice leaves less money for other purchases.A. Wise decisionsB. The value of moneyC. Permit the child to choose between them.D. Tell your child why he can –or cannot --- have certain things.E. Ask yourself what things that cost money are most important to youF. Talk about how the money bought the thing after you leave the toy store.G. The best time to teach a child anything about money is when he shows aninterest.II.完型There are times when people are so tired that they fall asleep almost anywhere. We can see there is a lot of sleeping on the bus or train on the __16____home from work in the evenings. A man will be__17____the newspaper, and seconds later it __18___ as if he is trying to ___19__it. Or he will fall asleep on the shoulder of the stranger___201___ place where unplanned short sleep __22__ is in the lecture hall where a student will start snoring〔打鼾〕so ___23____that the professor has to ask another student to___24___ the sleeper awake. A more embarrassing〔为难〕situation occurs when a student starts falling into sleep and the ___25___ of the head pushes the arm off the___26___, and the movement carries the__27___ of the body along. The student wakes up on the floor with no___28___ of getting there. The worst time to fallasleep is when __29___ . Police reports are full of ___30___ that occur when people fall into sleep and go__31_____ the road. If the drivers are ___32____ , they are not seriously hurt. One woman's car, ___33____ , went into the river. She woke up in four feet of __34____ and thought it was raining. When people are really ___35_____，nothing will stop them from falling asleep-----no matter where they are.16. A. way B. track C. path D. road17. A. buying B. folding C. delivering D. reading18. A. acts B. shows C. appears D. sounds19. A. open B. eat C. find D. finish20. A. lying B. waiting C. talking D. sitting21. A. Next B. Every C. Another D. One22. A. goes on B. ends up C. lasts D. returns23. A. bravely B. happily C. loudly D. carelessly24. A. leave B. shake C. keep D. watch25. A. size B. shape C. weight D. strength26. A. cushion B. desk C. shoulder D. book27. A. action B. position C. rest D. side28. A. memory B. reason C. question D. purpose29. A. thinking B. working C. walking D. driving30. A. changes B. events C. ideas D. accidents31. A. up B. off C. along D. down32. A. lucky B. awake C. calm D. strong33. A. in time B. at first C. as usual D. for example34. A. dust B. water C. grass D. bush35. A. tired B. drunk C. lonely D. lazyIII. 语法填空How Learning Habits Influence On Learning Results. It’s useful and necessary to discuss learning habits. There is a famous saying “Good habits lead to good endings.〞, 1 shows the importance of habits.“An apple a day keeps doctor away .〞also shows how a healthy everyday habit helps to build up our body. 2 , good learning habits can help us gain great learning results 3 (include) high scores and abundant knowledge. At first, learning habits form our ways of thinking and attitudes 4 the content of our learning. Obviously, a good habit can help us to speedup to reach our destinations. 5 we can see, cultivating a good habit isso important 6 I would like to introduce one kind of good learning habits----keep a learning diary every day. We can start the habit by 7(write) learning summary and remember to record something impressive and 8 (mean). Keep it in mind, and gradually we can gain this good learning habit and benefit from it.What’s more, I find out that I still have some bad learning habits as we ll.I can 9 concentrate on reading for a short time and I 10 ( conquer) this problem by spending more effort on concentration practice.I believe that through my efforts, I can gain good learning results by having good habits.1___________ 2_________ __ 3__________4__________ 5___________6___________ 7____________8__________9__________ 10__________IV.改错My swimming experience is extreme interesting. There was a time when I swim like a rock. This went on till one day when I was fishing with a friend of mineat nearby pond. I slipped into one. Had my friend not come to my rescue, I would have been drowned. Ever since then, I had come to know the importance of learning to swim. I didn’t attend at any training class but learned i t all by myself. Strange to say, I have difficult swimming at all now. Though the way I swim look awkward (笨拙的), at least it can keep me from floating. Thinking of this, I feel quiet satisfied.励志赠言经典语录精选句；挥动**，放飞梦想。

江西省上饶市横峰县2016-2017学年高二数学下学期第三周周练试题文编辑整理：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（江西省上饶市横峰县2016-2017学年高二数学下学期第三周周练试题文）的内容能够给您的工作和学习带来便利。

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江西省上饶市横峰县2016—2017学年高二数学下学期第三周周练试题 文一、单项选择题1、已知中心在原点的椭圆C 的右焦点为(1,0)F ，离心率等于21，则C 的方程是（ ）A 。

14322=+y x B.13422=+y x C 。

12422=+y x D.13422=+y x 2、已知21,F F 是椭圆)0(12222>>=+b a by a x 的两个焦点,AB 是过1F 的弦,则2ABF ∆的周长是（ )A.a 2B.a 4C.a 8D.b a 22+3、已知c 是椭圆2222x 1(a b 0)y a b+=>>的半焦距，则(b c)/a +的取值范围为（ )A 。

(1,)+∞B 。

(2,)+∞C 。

(1,2) D.(1,2] 二、填空题4、已知1F 、2F 是椭圆1:2222=+by a x C (a ＞b ＞0）的两个焦点，P 为椭圆C 上一点,且21PF PF ⊥.若21F PF ∆的面积为9，则b =____________.5、直线1y x =-与椭圆22142x y +=相交于,A B 两点，则AB =三、解答题6、已知椭圆()2222:10x y C a b a b+=>>的焦距为42，短半轴的长为2,过点()2,1P -斜率为1的直线l 与椭圆C 交于A B 、两点． (1）求椭圆C 的方程; （2）求弦AB 的长．7、设椭圆()222210x y a b a b+=>>的左焦点为F ，离心率为22，椭圆与x 轴与左焦点与点F 的距离为21-． （1）求椭圆方程；（2）过点()0,2P 的直线l 与椭圆交于不同的两点,A B ，当OAB ∆面积为22时，求AB ．8、设12,F F 分别是椭圆C:22221(0)x y a b a b+=>>的左,右焦点，M 是C 上一点且2MF 与x 轴垂直。

高二年级下学期(xuéqī)第三次双周练英语(yīnɡ yǔ)试卷第一局部：听力〔一共(yīgòng)两节，满分是30分〕第一节〔一共(yīgòng)5小题，每一小题1.5分，满分是7.5分〕听下面5段对话。

每段对话后有一个小题，从题中所给的A、B、C三个选项里面选出最正确选项，并标在试卷的相应位置。

听完每段对话后，你都有10秒钟的时间是来答复有关小题和阅读下二小题。

每段对话仅读一遍。

1.Where is the man’s brother?A.At homeB. In the hospitalC. In the office2.What is the probable relationship between the two speakers?A.Husband and wifeB. Waiter and customerC. Teacher and student3.Who is the man?aA.The woman’s husbandB. The woman’s bossC. The woman’s teacher4.What is the girl going to do next?A.Go to schoolB. Have breakfastC. Pack her school bag5.What will the woman do at about ten o’clock?A.Have a meetingB. Call Mr.Johnson againC. Go to Siemens第二节〔一共15小题，每一小题1.5分，满分是22.5分〕听下面5段对话或者单独。

每段对话或者独白后有几个小题，从题中所给的A、B、C三个选项里面选出最正确选项，并标在试卷的相应位置。

听每段对话或者独白前，你将有时间是阅读各个小题，每一小题5秒钟；听完后，各小题将给出5秒钟的答题时间是。

2021年高二下学期周末训练数学（理）试题（3） Word 版含答案一、填空题(本大题共14小题，每小题5分，共70分．请把答案填写在答题纸．．．相．应位置上．．．．．) 1. 若 ,则 ．2. 实数满足，则的值是 ．3. 随机变量的概率分布如下，则 ．4. 已知A,B,C,D 四点，其中任意三点不在一条直线上，从中取出两点作直线，共能作出 条直线.5. 的展开式中含的项的系数为 ．6. 被5除所得的余数为 ．7. 由0, 1,2,3,4,5这6个数字可以组成 个没有重复数字的三位偶数8. 若443322104)32(x a x a x a x a a x ++++=+，则的值为 ．9. 三个人独立地翻译密码，每人译出此密码的概率依次为，，，则恰有两人译出密码的概率为 ．10. 设复数满足条件，那么的最大值是．11．抛掷两颗质地均匀的骰子各1次，在向上的点数之和为7的条件下，其中有1个的点数为4的概率是．12. 已知,则集合．13. 已知，对于满足，则．14．在中，两直角边分别为、，设为斜边上的高，则，由此类比：三棱锥中的三条侧棱、、两两垂直，且长度分别为、、，设棱锥底面上的高为，则．二、解答题（本大题共6小题，共计90分．请在答题纸．．．指定区域．．．．内作答，解答时应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）实数取何值时，复数（1）是实数；（2）是纯虚数；（3）对应的点位于复平面的第一象限．16. （本小题满分14分）已知的展开式中第3项的系数与第5项的系数之比为．（1）求的值；（2）求展开式中的常数项．17. （本小题满分14分）某医院有内科医生6人，外科医生4人.（1）现要选派4名医生参加赈灾医疗队，内科医生和外科医生都要有人，不同的选派方法有多少种？（2）现要选派6名医生参加3个不同地方的赈灾医疗队，要求每个地方由一名外科医生和一名内科医生组成，不同的选派方法有多少种？18. （本小题满分16分）某次乒乓球比赛的决赛在甲乙两名选手之间举行，比赛采用五局三胜制，按以往比赛经验，甲胜乙的概率为．（1）求恰好比赛三局甲获胜的概率；（2）求甲获胜的概率；19. （本小题满分16分）某中学有4位学生申请A，B，C三所大学的自主招生．若每位学生只能申请其中一所大学，且申请其中任何一所大学是等可能的．（1）求恰有2人申请A大学的概率；（2）求被申请大学的个数X的概率分布列和数学期望．20.（本小题满分16分）已知数列满足且（1）计算的值，由此猜想数列的通项公式，并给出证明；（2）求证：当时，26983 6967 楧122518 57F6 埶22603 584B 塋,f27876 6CE4 泤34574 870E 蜎37699 9343 鍃24027 5DDB 巛8qo28323 6EA3 溣>。

高二下学期语文周末练习题一、阅读下面的文字，完成1—3题（共9分）:寻找暗物质云凡绝大多数天文学家均接受这样一个令他们困惑的事实：宇宙中看不见的物质在数量上要远远超过我们能够看到的。

宇宙中的暗物质比构成我们普通世界的原子物质多得多。

在阅读这段文字时，每秒将有100万暗物质粒子穿过你的小指。

人们却看不到它们，因为它们不发射任何光，它们不带电荷，与原子物质的相互作用很少。

暗物质没有电磁场，这也就意味着几乎无法借助任何常规科学测量设备探测到它们的存在。

但人们知道它们是存在的，因为如果它们不存在，就无法解释宇宙的结构。

1915年，爱因斯坦根据他的相对论得出推论：宇宙的形状取决于宇宙质量的多少。

他认为宇宙是有限封闭的。

如果是这样，宇宙中物质的平均密度必须达到每立方厘米5×10-30克。

但是，迄今可观测到的宇宙的密度，却比这个值小100倍。

也就是说，宇宙中的大多数物质“失踪”了，科学家将这种“失踪”的物质叫“暗物质”。

谁最先发现了暗物质呢？20世纪30年代，瑞士天文学家茨威基发表了一个惊人的言论：在星系团中，看得见的星系只占总质量的1%以下，而99％以上的质量是看不见的。

茨威基首先发现了暗物质的存在，但当时许多人并不相信茨威基的结果。

万物之间存在万有引力，太阳系的八大行星围绕太阳旋转，越往外其转动的速度越低。

20世纪70年代初，科学家在观测宇宙其他一些星系中的恒星运行速度时就发现，越往外，围绕中心的速度并不都是衰减下去，而是和内圈恒星的速度差不多。

这与越往外，物质越少，引力也越小，速度也应该越低的常规不符。

科学家们大胆地猜测：宇宙中一定有某些物质没有被我们的天文观测所发现，这些物质被称为“暗物质”。

科学家认为，通过测量物体围绕星系转动的速度可以找到暗物质存在的证据。

计算的结果发现，星系的总质量远大于星系中可见星体的质量总和，推算的结果：星系中的暗物质约占宇宙物质总量的20％～30％。

如何“网”住暗物质？科学家们也想了很多办法。

卜人入州八九几市潮王学校高二理科数学周练〔三〕一.选择题：2{|log ,},{|9}A x y x y Z B x N x +==∈=∈≤，那么A B =〔〕A.{1,2,3,4}B.{2,4,6,8}C.{1,2,4,8}D.{2,4,8}z 满足(13)2(1)i z i -+=+〔i 为虚数单位〕，那么z 在复平面内对应的点位于〔〕 “2000:,230p x R x x ∃∈-+≤〞的否认是“2,230x R x x ∀∈-+>221716x y +=〕A.p q ∧ B.p q ⌝∧ C.p q ⌝∨ D.p q ∨212sin ()12y x π=--的图象，可以将函数sin 2y x =的图象〔〕个5.“(1)(2)0x x --=〞是“x-1=0〞的〔〕条件6.函数],[|,|sin ππ-∈+=x x x y 的大致图象是〔A 〕〔B 〕〔C 〕〔D 〕3363,.,22a ab a b ==+=，那么向量a 在b 上的投影是〔〕A.12{}n a 满足312ln ln ln ln 3........()36932n a a a a n n N n +=∈，那么10a =〔〕 A.30e B.1003eC.1103eD.40e9.实数x,y 不等式组x-y+10≥,x+2y+10≥,2x+y-10≤,假设直线y=k(x+1)把不等式组表示的平面区域分成上下两局部的面积之比为1:2，那么k=()M M M F F F E E E DD DA.14B.13C.12D.3410.在ABC ∆中，有正弦定理：sin sin sin a b cA B C ===定值，这个定值就是ABC ∆的外接圆的直径．如图2所示，DEF ∆中，DEDF =，点M在直线EF 上从左到右运动〔点M 不与E 、F 重合〕，对于M 的每一个位置，记DEM ∆的外接圆面积与DMF ∆的外接圆面积的比值为λ，那么 〔A 〕λ先变小再变大〔B 〕仅当M 为线段EF 的中点时，λ获得最大值 〔C 〕λ先变大再变小〔D 〕λ是一个定值 图211.设P 为曲线f(x)=x 3+x-2上的点,且曲线在P 处的切线平行于直线y=4x-1,那么P 点的坐标为()A ．(1,0)B ．(2,8)C ．(1,0)或者(-1,-4)D ．(2,8)或者(-1,-4) 22122:1(0,0)x y C a b a b-=>>的右焦点为抛物线22:2C y px =的焦点F ，且点F 到双曲线的一条渐近3，假设双曲线1C 与抛物线2C 在第一象限内的交点为0(,26)P x ，那么该双曲线的离心率等于〔〕23D.12+二、填空题：ABC ∆中，B=120°，AC=7，AB=5，那么ABC ∆的面积为_______________ 2,0()2,0x x f x x x +≤⎧=⎨-+>⎩，那么不等式2()f x x ≥的解集是_____________ {}n a 的通项公式是248n a n =-，那么当其前n 项之和最小时n 的取值是________ 2()xx f x e=，假设对任意的12,[1,2]x x ∈-的恒有12(1)()()aff x f x ≥-成立，那么实数a 的取值范围是__________________ 三、解答题：ABC ∆中，角A 、B 、C 的对边分别为a,b,c,假设2222222sin sin sin a b c A Ca cb C+--=+-，b=4(1)求B(2)求ABC ∆面积的最大值22129x y m m +=-2215y x m -=离心率的取值在 {}n a 满足21n n S a n +=+，其中n S 是数列{}n a 的前n 项和〔1〕写出此数列前四项并以此归纳出{}n a 的通项公式〔2〕试用数学归纳法证明你的结论 —ABCD 中，底面ABCD 为边长为4的菱形，∠BAD=60°，面PAD ⊥面ABCD ，，M 、N 分别为BC 、PA 的中点〔1〕求证：BN ∥平面PDM ；〔2〕求平面PAB 与平面PCD 所成锐二面角的大小2222:1(0)x y C a b a b +=>>的左右焦点分别为1F 〔-1,0〕，2F 〔1,0〕〔1〕求C的方程〔2〕过2F 的直线交椭圆C 于A 、B ，求1ABF ∆面积的最大值1()ln (1)f x a x a x x =-+-〔1〕当a<-1时，讨论f(x)的单调性〔2〕当a=1时，假设1()1g x x x=---，求证：当x>1时，g(x)的图象恒在f(x)的图象上方 参考答案：4.[-1,1]13或者2416.2ae ≥17.〔1〕60°〔2〕5(0,][3,5)29.略20.〔1〕略〔2〕60°21.〔1〕22236xy +=〔2 22.〔1〕当-2<a<-1时，f(x)在(0,1)上递增，在1(1,)1a -+上递减，在1(,)1a -+∞+递增；当a=-2时，在(0,)+∞上递增；当a<-2时，在1(0,)1a -+上递增，在1(,1)1a -+递减，在(1,)+∞上递增〔2〕略。