高一 练习 1

高一英语必修一Unit1同步练习题1（北师大版）一、教学内容：Unit 1 of Module I Period One （Lesson 1 & 2）二、教学目标与要求：1、在第一课和第二课里，我们学习了如何谈论我们的生活方式。

话题的选择贴近我们的生活，能引起同学们共鸣，激发同学们的学习动机。

2、复习一般现在时态和现在进行时态，以及它们的用法和区别。

3、进一步了解不同文化背景下，不同的个人生活方式，引导同学们树立良好的学习和生活习惯。

4、学习策略：运用听力策略对所听内容进行预测。

5、掌握重点单词、短语、句式，在练习中能灵活运用。

三、本周重难点词汇讲解：1、peaceful adj .和平的，平静的peace (n.和平)+-ful（形容词后缀）The peaceful uses of atomic energy will do good to human beings .原子能的和平利用将造福人类。

It's peaceful at home when the children are at school .孩子们在学校上学时，家里就安静了。

（1）反义词：unpeaceful adj. 不平静的，不和平的派生词：peacefully adv. 和平地，平静地（2）同义词辨析：peaceful 与calm这些形容词表明没有激动兴奋或未被打扰。

calm 隐含远离情感冲动之意；peaceful 意指未被打破的镇静。

2、relaxing adj .轻松的，放松的relax(v. 放松)+-ing(形容词后缀)All the students going for holidays, it is really a relaxing evening for the headteacher.所有的学生都度假去了，对于班主任来说这真是一个使人感到轻松的夜晚。

同根词：relaxed意为"感到轻松的"。

高一英语必修一1-5单元练习unit1一）把句子补充完整1. 你把所有的数加起来就会知道You will know the __________ when you _______ ________ all the numbers.2. 我们努力想让他平静下来，但他还是激动地大叫。

We tried to _________ him _________ but he kept __________ excitedly.3. 玛丽在医院里住了很长一段时间后，恢复了健康。

After a long stay________ _________ Mary ________4. 李鸣在这里定居后，和邻居们相处得很好。

Since Li Ming _________ here, he has ________ ________ _____<_________ his neighbours.5. 如果你不想和我在一起，你就收拾东西走人。

If you don’t want to stay with me, you can _______ _______ and go.6. 战争期间，我受了很多苦。

我用日记记下自己的经历，以便老了以后能够记住。

During the war, I ________ a lot. I wrote my diary to ________ ________ my___________, so I would __________ them when I was old.二）填入所缺的词。

1. It was quite terrible. It took me some time to c______ down myself.2. Parents are always c_______ much about their children..3. True friends always s______ their sadness and happiness with each other.4. I'm terribly sorry. I didn't do it on p__________.5. Some animals hibernate under snow, because there is much air in l______ snow.6. A_______ to the law, t_______ are not allowed to smoke or drink.7. The old man went t_______ many wars and s_____ a lot from them.8. After the terrible hurricane, the whole house was destroyed e________.9. If you have some trouble, you can go to the teacher for a_________.10. By internet, we can c_________ with people all over the world c_________.11. By now, he has formed the h______ of doing some reading before going to bed.12. The r_____ he gave for his c_____ in the exam was simple.[三）选择填空--- Mary’s got crazy and has been sent to the mental hospital. Did you tell her boss about that --- Yes, but I _____ her husband first.A. should have toldB. shouldn’t have toldC. must have toldD. needn’t have toldThere was ______ time _____ Chinese used foreign oil.A. a; whenB. a; whileD. /; while3．It was because of bad weather __________ the football match had to be put off.A. soB. so thatC. whyD. that4. ---Look! The telephone is broken. Someone damaged it ________ purpose.---That may be right. But perhaps it was broken _________ accident.A. on; by！B. by; byC. on; onD. by; on5. What great trouble we had ___________ where his house was.A. in findingB. to findC. findD. found6. Some students have trouble _____ grammar while others have difficulty______ new words.A. in; remember#B. for; to rememberC. on; rememberingD. with; remembering7．I cannot spend ________ money on the car which is ________ expensive for me.A. too much; much tooB. far too; too muchC. much too; too muchD. too many; much too8．catch the first bus, he got up very early this morning.A. In order to！B. In order thatC. So as toD. So that9. There are altogether 6 people in the room, the baby________.A. includeB. includingC. includedD. to include10. The manager of the factory told us that very little ______ was made of the waste material in the past.A. costC. useD. matter11. There is no _____ swimming-pool in this school and the students often go to swim _____.A. indoors; outdoorsB. indoor; outdoorC. indoor; outdoorsD. indoor; indoors12. It is the first time that I _______ this kind of moon cake.A. enjoyed￥B. have enjoyedC. enjoyD. enjoying13. When was it _____ your mother showed you around the West LakeA. untilB. ifC. whichD. that14．In the reading room , we found her _____ at a desk, with her attention ____ on a book.A. sitting; fixing~B. to sit; fixedC. seating; fixingD. seated; fixed15．I’m glad you’ve come; I am _______ telephoning you.A. at the point ofB. to the point ofC. on the point ofD. in the point of&Answers（一）1. result, add, up2.. calm, down, shouting3. in, hospital, recovered.4. settled, got , along, well, with5. pack, up6. suffered, set, down, experiences, remember（二）1. calm2. concerned3. share4. purpose5. loose6. according, teenagers7. through, suffered 8. entirely 9. advice 10. communicate 11. habit~12. reason, cheat（三）1-5 AADAA6-10 DAACC11-15 CBDDC高一英语必修一1-5单元练习unit2一）单项选择1 Mr. Huang will ________ in the movement.A. play a leading partB. take partsC. play leading partD. take a part2. We discussed where to go for a whole morning, but we decided to stay at home_____.：A. at the endB. by the endC. in the endD. on end3. _____ of the students who took part in the military training is 450.A. A numberB. A lotC. LotsD. The number4. Sometimes ________ English is quite different from _______ English in many ways.A. speaking, writingB. spoken, writtenC. speaking, writtenD. spoken, writing5. Can you tell me if you have found the key ________ your car.A. forB. toC. aboutD. by6. When we visited Zhou Zhuang again ten years later, we found it changed so much that we could hardly ________ it.A. rememberB. think aboutC. believeD. recognize（7. It is so nice to hear from her, _______, we last met more than 30 years ago.A. what’s moreB. that’s to sayC. in other wordsD. believe it or not8. They lived a hard life and were often made _______ for over ten hours a day.A. workB. to workC. to workingD. worked9. Do you have any difficulty ________A. on listeningB. to listeningC. for listeningD. with listening10. Please tell me the way you thought of _______ the garden.A. take care ofB. to take care ofC. taking care ofD. to take care11. Can you explain how it _______ that you missed the morning classesA. came acrossB. came toC. came upD. came about#12. China Daily is ____ a newspaper, for it can also serve as a useful textbook for English study.A. more thanB. more or lessC. less thanD. more and more13. The leader of the factory told us that very little _______ was made of the waste material in the past.A. costB. valueC. useD. matter14. The reason _____ being late for the meeting was ____ his little son fell ill this morning.A. for, thatB. why, thatC. for, becauseD. why, because15. You made the same mistake for _____ second time, dropping ____ “n” in the word “government”.A. a, the , a C. the, an D. a, an16. The president, together with his bodyguards, _____ to the nuclear station _____ there was an accident 20 minutes ago.A. have come, whichB. came, in which（C. has come, whereD. came, in where17.“Not all of the dinosaurs were dangerous”. This sentence means ____ .A. none of the dinosaurs were dangerous.B. all of the dinosaurs were not dangerous.C. few of the dinosaurs were dangerous.D. no dinosaurs were dangerous18. －He asked Tom, “Have you finished your homework”－He asked Tom ______ .A. if had he finished his homework.B. whether he had finished his homework.|C. if he had finished his homework.D. if you had finished your homework.19. He realized she was crying ________ what he had said.A. becauseB. because ofC. asD. since20. ------You haven’t done it But I tried my best and did it _____in__ the way _____that__ I think is the best.二）根据首字母提示完成句子。

高一课时作业1一、词法突破A.单词拼写1.I was _______(焦虑的)about the children when they didn’t come back home from school.2.What _______(使恼怒) me is that he won’t even listen to other people’s suggestions.3.She is not an _______(外向的)person and she doesn’t let anyone know what she truly feels.4.We felt at home with her and were _______(给……留下印象)with the depth of her knowledge.5.The appearance of a spaceship makes it possible for us to _______(探索)the moon.6.Tom arrived at school late again,which made him feel _______(令人尴尬的).7.How to do the _______(实验)has not been discussed yet.B.单句语法填空1.Your brother was so angry that we couldn’t calm him________.2.The United Nations is an international________(organize).3.You should depend on________ that he is an honest boy.4.People tend to exercise in the morning partly because the morning air is so good________(breathe).5.As a candidate,you must make a good________(impress) on everyone you meet if you want to win the election.6.When my own son was five years old, I became eager_______ another baby.7.Your spare time should be made the most of ________(practice) your spoken English.8.She got ________ a panic when she couldn’t find the tickets.9.They were very curious________ the people who lived upstairs.10.What he said at the meeting really made me________(embarrass).二、完形填空The most important lesson I learned in high school had nothing to do with maths or American history.It came at graduation,several minutes 1 , I left Miramonte High School.I was rather shy back then,content to hang around with my few friends and to concentrate on my2 .I was doing so well that by the end of senior year I had perfect3 and enough credits to go to college.But my good record soon became a fear to my well-being.In early June of senior year,the headmaster called me into his office.He asked me to give a leave-taking speech at graduation.I looked at him,my heart 4 fast.This was the reward for my hard work? I said something,but not very clearly,and hurried away from the office.I was 5 about the decision,though finally agreeing to take up the task.I wasn’t the only speaker—I would 6 the honor with five other students.Still,I was uncertain whether the task was beyondme.How in the world would I give a speech to hundreds of people?Graduation day soon arrived and,as 7 ,I was nervous.I’d been practicing my speech for days,andI had it 8 .But I had 9 been so terrified in my life.The first half hour of the 10 passed,andthen my 11 came.My name was announced.I 12 to reach the platform without falling down.But within minutes,I finished my speech, 13 back to my seat.Now I still have the 14 of that speech.My voice trembled a little,but 15 it was clear and strong.I’m proud of that tape.I achieved 16 I’d never dreamed—I spoke in front of hundreds of people.Although I didn’t realize it at the time,the successful completion of that speech gave me the 17 to participate in class at college,to give oral reports,and to eventually break free of my 18 .I never would have chosen to give a speech at graduation.But I’m 19 I did.I know it may well 20to be one of my shining moments.1.A． before B． after C． when D． while2.A． hobbies B． interests C． games D． subjects3.A． manners B．Relationship C． scores D． characters4.A． burning B. breaking C． aching D． beating5.A． doubtful B．Optimistic C． generous D． hesitant6.A． share B． bring C． spare D． give7.A． intended B． hoped C． expected D． planned8.A． thrown B． printed C． memorized D． completed9.A． ever B． never C． always D． hardly10.A． lesson B． task C． ceremony D． match11.A． moment B． day C． chance D． decision12.A． managed B． tried C． wanted D． succeeded13.A． passing B． heading C． handing D． sitting14.A． photo B． tape C． paper D． word15.A． partly B． immediately C． frankly D． mostly16.A． everything B． anything C． nothing D． something17.A． respect B． confidence C． freedom D． excuse18.A． shyness B． pride C． stupidity D． courage19.A． afraid B．Disappointed C． glad D． puzzled20.A． turn off B． turn out C． set off D． set out三、阅读理解AThis year some twenty-three hundred teenagers(young people aged from 1～7) from all over the world will spend about ten months in US homes.They will attend US schools, meet US teenagers, and form impressions of the real America. At the same time, about thirteen hundred American teenagers will go to other countries to learn new languages and gain a new understanding of the rest of the world.Here is a two-way student exchange in action.Fred,nineteen,spent last year in Germany with George’s family. In turn,George’s son Mike spent a year in Fred’s home in America.Fred,a lively young man,knew little German when he arrived,but after two months’ study the language began to come to him. School was completely different from what he had expected—much harder.Students rose respectfully when the teacher entered the room.They took fourteen subjects instead of the six that were usual in the United States.There were almost no outside activities.Family life,too,was different.The father’s word was law,and all activities were around the family rather than the individual.Fred found the food too simple at first.Also,he missed having a car.“Back home,you pick up some friends in a car and go out and have a good time.In Germany,you walk,but you soon learn to like it.”At the same time,in America,Mike,a friendly German boy,was also forming his idea.“I su ppose I should criticize American schools,” he said.“It is far too easy by our level.But I have to say that I like it very much.In Germany we do nothing but study.Here we take part in many outside activities.I think that maybe your schools are better in training for citizens.There ought to be some middle ground between the two.”1.The whole exchange program is mainly to______.A．help teenagers in other countries know the real AmericaB．send students in America to travel in GermanyC．let students learn something about other countriesD．have teenagers learn new languages2.What is particular in American schools?A． There is some middle ground between the two teaching buildings.B． There are a lot of outside activities.C． Students usually take 14 subjects in all.D． Students go outside to enjoy themselves in a car.3.What did Mike think after experiencing the American school life?A． A better education should include something good from both America and Germany.B． German schools trained students to be better citizens.C． American schools were not as good as German schools.D． The easy life in the American school was more helpful to students.4.What’s Mike’s attitude towards American education?A． Praise.B． Regret.C． Ignore.D． Accuse (指责).BMany people go to school for an education.They learn languages,history,geography,physics,chemistry and mathematics.Others go to school to learn a skill so that they can make a living.School education is very import ant and useful.Yet no one can learn everything they want to know.The teacher’s job is to show his students how to learn.He teaches them how to read and how to think.So,much more is to be learned outside school by the students themselves.It is always more important to know how to study by oneself than to memorize some facts or a formula(公式).It is usually quite easy to learn a certain fact in history or a formula in mathematics.But it is very difficult to use a formula in working out a maths problem.Great scientists,such as Einstein,Newton and Galileo didn’t get anything from school.But they were all so successful.They invented so many things for mankind.The reason for their success is that they knew how to study.They read books that were not taught at school.They worked hard all their lives,wasting not a single moment.They would ask many questions as they read and they did thousands of experiments.Above all,they knew how to use their brains.5.Many people go to school for an education.But some others go to school for_______.A． enjoying themselves B． learning subjectsC． learning a skill D． making a living6.A teacher’s job is mainly to train his students to master the ability of________.A． learning by themselves B． making a livingC． reading and thinking D． studying all the subjectsing a formula in working out a maths problem is memorizing it_________.A． much easier than B． more difficult thanC． as easy as D． as difficult as8.The scientists were successful because_________.A． they read books that were not taught at schoolB． they worked all their livesC． they wasted not a single momentD． they knew how to use their brainsCI sat in my seat as my new classmates found theirs.At the front of the class stood our new math teacher watching us,“Come on.We don’t have all day.Get settled,please.”The bell rang.“Welcome to a new school year.I’m Mr.Stevens and I’m sure I’ll learn all your names in no time.” He walked around the class handing out math books.When it was done,he returned to the front of the class and looked at us.We stared back.“What are you waiting for? Get started,” he said.We looked at him and were confused.Wasn’t he going to teach us?“Is there something wrong with your ears? You’re not all deaf,are you？”A brave boy at the back of the class asked what we all wanted to know.“Mr.Stevens,aren’t you going to teach us？”Mr.Stevens said,“You’re smart kids.Open your b ooks and get to it.If you have any trouble or any questions,raise your hand,and I’ll help you.”My friend Paul and I exchanged glances and opened our books to the first chapter(章).A competition began.Paul and I spent all our free time at home working through the lessons.Mr.Stevens,keeping his word,helped anyone who was stuck in a problem.We worked hard and finished two and one half math books the first year.It was a turning point in my life.Mr.Stevens made me realize I was good at math and also able to reach the top of any class I attended.Monty Python’s Flying Circus was a popular television show back then.The actors brought the best British humor into our Canadian lives.Mr.Stevens would often act out one of their skits in front of the class.Some thought he was strange,and I guess he was,but he knew how to make a math lesson interesting.9.What was special about Mr.Stevens,according to the author?A． He was strict with the students.B． He treated each student equally.C． He taught the students to learn on their own.D． He brought English humor into class.10.Why did the author believe being taught by Mr.Stevens was a turning point in his life?A． Because he came to like school from then on.B． Because he realized he could be a top student.C． Because he began to show interest in math.D． Because he changed his attitude towards life.11.The author’s attitude towards Mr.Stevens is that of ________.A． respect B． doubtC． misunderstanding D． disappointment12.The underlined word “skits” in the last paragraph probably means “________”.A． important lessons B． wild animalsC． famous actors D． funny performancesDAre you scared about moving up to senior high school? It can be a new experience, but you shouldn’t worry. We’ve put together a guide on how to survive the first week.You’re not aloneRemember everybody else in you year is in the same boat. They may not realize it, but they’re just as nervous as you are. Moving to senior high is an opportunity, not a problem. Things are different and all you need to do is be polite and learn the new rules.Teachers are ready to helpIf you’re unsure what to do or are worried about anything, then you had better ask for help. Teachers are probably the best people to turn to as they’re experienced in helping new students. Some senior high schools also have a “friends system”. If your school has this, then you will be paired with an older student. They will look out for you and help you if you have any problems or questions.All changeThere are lots of differences between junior high school and senior high school.You’ll have a homework diary or a student planner. You will have your lessons with different teachers in different rooms. You will have homework for different subjects on different days, so make sure you get organized. Make sure you have a copy of your school timetable written down so you know which rooms your classes are in and on which days you will have your different subjects.Other pointsIf you’ve got an older brother or sister at school, then ask them for advice.Be yourself! It sounds simple, but people will know you much better if you just act naturally.Having early nights makes a difference and you’ll find it easier to get up in the morning!13.Which of the following is closest in meaning to the underlined sentence?A． Other students have similar feelings to yours.B． Other students have to learn boating with you.C． Other students will help you solve your problems.D． Other students will teach you politeness and new rules.14.The new students turn to teachers first when having problems because .A．teachers won’t blame them as parents doB． teachers are good at helping solve problemsC． teachers are equal to every studentD． parents are too busy to help them15.What’s the purpose of the passage?A． To tell students the importance of learning.B． To warn students not to ignore friendship in senior high.C． To make a difference when moving up to senior high.D． To help new students to get used to the life in senior high.四、七选五Reading books can be a great way to pick up new vocabulary and develop your understanding of a language. __1__For beginners,I would recommend starting with something short and simple.Avoid the classics,for they often use very old English words and involve complex themes.Children's books can be a great place to start with. __2__ Dr. Seuss writes his books in rhyme and they are all very funny.Starting with something like this means you are more likely to finish the book and want to read more.__3__ The book isn't too long and if you've seen the film,it may be easier to follow.If you like reading about historical events,Anne Holm's IamDavid is a good read.If you're not quite ready to read a full book,why not try Roald Dahl's Revolting Rhymes？__4__ Or,try a very short book like one from Roger Hargreaves's MrMenand Little Miss series.Although they are intended for young children,they are a good way to pick up some more basic vocabulary.My last piece of advice is to read something that interests you.Look at the short summary of the book on the back cover and see if it looks like something that you will enjoy.Think about the type that is in your own language and find that type in English. __5__A．Dr Seuss's books are guaranteed to make you laugh.B．The key to success is choosing the right book for you.C．Reading can bring you a lot of fun as well as knowledge.D．How much you can understand a book depends on your vocabulary.E．For more advanced learners,you could try The Hobbit by J．R.R.Tolkien.F．This way,you're more likely to enjoy reading rather than see it as a headache.G．This book contains lots of short stories,based on fairy tales,all written in rhyme.五．语法填空After a long summer holiday, my new life at senior high school 26. (begin) at last. I was a little 27. (anxiety) in the morning, 28. (worry) that I would not make new friends. I was not outgoing after all. However, things turned 29. just fine. Both my teachers and classmates made a good 30. (impress) on me. There were friendly and helpful. In fact, one of my classmates was so talkative 31. he kept talking to me over the experiment! Maybe he was just trying to impress me, but I felt 32. (annoy) because I couldn’t concentrate. I was too frightened 33. (tell) him to leave me alone. It would be awkward if I did. The classes were much more difficult than 34. at junior high school. There is a lot for me 35. (explore). I hope I can fit in soon.六、应用文写作假如你是李华,你的朋友Tom给你来信说近期由于饮食问题而身体不适,影响了学习和生活。

高一生物遗传练习题1、某种鼠中，毛的黄色基因Y对灰色基因y为显性，短尾基因T对长尾基因t为显性，且基因Y或T在纯和时都能使胚胎致死，这两对基因是独立分配的，现有两只黄色短尾鼠交配，他们所生的后代表现型为A．9∶3∶3∶1 B．4∶2∶2∶1 C．3∶3∶1∶1 D．1∶1∶1∶12、血友病是一种伴X染色体隐性遗传病，某对表现正常的夫妇均有一个患病的弟弟，但家庭的其他成员均不患病，他们的子女患病的概率为A．0 B．1/2 C．1/4 D．1/83、.大约在70个表现正常的人中有一个含白化基因的杂合体。

一个双亲正常但有白化病弟弟的正常女子，与一无亲缘关系的正常男子婚配。

问她所生的孩子患白化病的概率是多少？A. 1/140B. 1/280C. 1/420D. 1/5604、.基因型为YyRr的黄色圆粒豌豆，其自交后代中至少有一对基因为显性纯合的个体占A.3/16B.5/16C.7/16D.9/165、.下边四图各基因控制的性状都为完全显性，有关的说法不正确的是A．细胞图为A的个体，其自交后代的表现型有4种，其比例为9：3：3：1B．细胞图为B的个体，其自交后的表现型有2种，其比例为3：1C．细胞图为C的个体，其测交后代的表现型有4种，其比例为1：1：1：1D．细胞图为D的个体，其测交后代的表现型有4种，其比例为1：1：1：16、已知某环境条件下某种动物的AA和Aa个体全部存活，aa个体在出生前会全部死亡，现该动物的一个大群体，只有AA、Aa两种基因型，其比例为1：2.假设每对亲本只交配一次且成功受孕，均为单胎。

在上述环境条件下，理论上该群体随机交配产生的第一代中AA和Aa的比例是：A．1:1 B. 1:2 C. 2:1 D. 3:17、．右图表示某动物正在进行减数分裂的细胞，等位基因A和a位于染色体的位置（不考虑互换和突变）可能是A．A位于①上，a则可能位于⑤上B．A位于⑤上，a位于⑦上C．该细胞只有A，分别位于②和⑥上8、果蝇被广泛地应用于遗传学研究的各个方面。

高一必修一第一、二章练习1、已知函数f(x)＝lg(1＋x)＋lg(1－x)．(1)求函数f(x)的定义域；(2)判断函数f(x)的奇偶性；(3)若f(x)＝lg g(x)，判断函数g(x)在(0,1)内的单调性并用定义证明． 1、设函数()212xxa f x =+-（a 为实数）（1）当a ＝0时，若函数()y g x =的图象与()f x 的图象关于直线x =1对称，求函数()y g x =的解析式；（2）当a <0时，求关于x 的方程()f x ＝0在实数集R 上的解.解：（1）当a =0时，()21xf x =- 设()yg x =图像上任意一点P （x 、y ），则P 关于x =1的对称点为P /（2－x ，y ） 由题意P /（2－x ，y ）在()f x 图像上,所以, 221xy -=-,即2()21xg x -=-;（2）()0f x =,即2102xxa +-=,整理，得：2(2)20x xa -+=所以11422x a ±-=，又a<0，所以14a ->1 所以11422x a +-=，从而2114log 2a x +-=3、已知函数xx a b y 22++=(a 、b 是常数且a>0，a ≠1)在区间[－23，0]上有y max =3，y min =25，试求a 和b 的值.解：令u =x 2+2x =(x +1)2－1 x ∈[－23，0] ∴当x =－1时，u min =－1 当x =0时，u max =0.233222223225310)2222531)1011⎪⎪⎩⎪⎪⎨⎧==⎩⎨⎧==⎪⎪⎩⎪⎪⎨⎧==⎪⎩⎪⎨⎧=+=+<<⎩⎨⎧==⎪⎩⎪⎨⎧=+=+>--b a b a b a a b a b a b a a b a b a 或综上得解得时当解得时当 4、已知函数f (x )=lg (a x 2+2x +1)（1）若f (x )的定义域是R ，求实数a 的取值范围及f (x )的值域；（2）若f (x )的值域是R ，求实数a 的取值范围及f (x )的定义域.解：（1）因为f (x )的定义域为R ，所以a x 2+2x +1>0对一切x ∈R 成立．由此得⎩⎨⎧<-=∆>,044,0a a 解得a >1. 又因为ax 2+2x +1=a (x +a 1)+1－a 1>0，所以f (x )=lg (a x 2+2x +1) ≥lg (1－a1)，所以实数a 的取值范围是(1,+ ∞) ，f (x )的值域是⎪⎪⎭⎫⎢⎣⎡+∞⎪⎭⎫ ⎝⎛-,11lg a ( 2 ) 因为f (x )的值域是R ，所以u =ax 2+2x +1的值域⊇(0, +∞).当a =0时，u =2x +1的值域为R ⊇(0, +∞)；当a ≠0时，u =ax 2+2x +1的值域⊇(0, +∞)等价于⎪⎩⎪⎨⎧≤->.0444,0aa a解之得0<a ≤1. 所以实数a 的取值范围是[0.1] 当a =0时，由2x +1>0得x >－21,f (x )的定义域是(－21,+∞)； 当0<a ≤1时，由a x 2+2x +1>0 解得aa x aa x --->-+-<1111或f (x )的定义域是⎪⎪⎭⎫⎝⎛+∞---⎪⎪⎭⎫⎝⎛-+-∞-,1111,a aa a5、已知函数f(x)是11102-+=xy （x ∈R ）的反函数，函数g (x )的图象与函数21+-=x y 的图象关于直线x =－2成轴对称图形，设F(x )=f (x )+g (x ). （1）求函数F(x )的解析式及定义域；（2）试问在函数F(x )的图象上是否存在两个不同的点A,B ，使直线AB 恰好与y 轴垂直？若存在，求出A,B 坐标；若不存在，说明理由.解：(1)F(x )定义域为(－1,1) (2)设F(x )上不同的两点A(x 1，y 2)，B(x 1 y 2),－1< x 1< x 2<1则 y 1-y 2 =F(x 1)-F(x 2)==+-+--+++-2111lg2111lg222111x x x x x x ⎪⎪⎭⎫ ⎝⎛+-++⎪⎪⎭⎫ ⎝⎛-+⋅+-21211111lg 212211x x x x x x=)2)(2(1111lg 21122112++-+⎪⎪⎭⎫ ⎝⎛--⋅++x x x x x x x x . 由－1< x 1< x 2<1 得,0)2)(2(,0,111,11121122112>++>->-->++x x x x x x x x 所以,0)2)(2(,01111lg 21122112>++->⎪⎪⎭⎫ ⎝⎛--⋅++x x x x x x x x y 1> y 2， 即F(x )是(-1,1)上的单调减函数， 故不存在A,B 两点，使AB 与y 轴垂直.6、已知26{|4},{|0},{||3|3}1x A x x B x C x x x-=≥=≥=-<+，若U R =，（1）求()()U U C B C C ，（2）求()U A C B C7、不等式321x x +≤+的解集为A ，不等式[(1)](2)0,(1)x a a x a -+-><的解集为B（1）求集合A ；（2）若B A ⊆，求实数a 的取值范围解：31201111x x x x x x +-≤⇔≥⇔<-≥++或 }11|{≥-<=x x x A 或（2）a a a 21,1>+∴< }12|{+<<=a x a x B2211112,-≤≥⇒-≤+≥∴⊆a a a a A B 或或又1<a ，所以a 的范围是1212<≤-≤a a 或8、212222f{f[f(3)]}.42x x x x x x π⎧≤-⎪⎪-<<⎨⎪-≥⎪⎩已知：f(x)=求9、如图所示,在边长为4的正方形ABCD 的边上有一点P,沿着折线BCDA 由点B(起点)向点A(终点)运动.设点P 运动的路程为x,△ABP 的面积为y. (1)求y 与x 之间的函数关系式; (2)画出y=f(x)的图象.解：(1)当P 点在BC 上，即0≤x ≤4时，S △ABP=1/2×4×x=2x;当P 点在CD 上时，S △ABP=1/2×4×4=8; 当P 点在AD 上时，S △ABP=1/2×4×(12-x).(2)画出y=f(x)的图象，如右图所示.10、已知函数f (x )＝mx 2＋23x ＋n是奇函数，且f (2)＝53.(1)求实数m 和n 的值；(2)判断函数f (x )在(－∞，0)上的单调性，并加以证明． 解 (1)∵f (x )是奇函数，∴f (－x )＝－f (x )， ∴mx 2＋2－3x ＋n ＝－mx 2＋23x ＋n ＝mx 2＋2－3x －n.比较得n ＝－n ，n ＝0. 又f (2)＝53，∴4m ＋26＝53，解得m ＝2.即实数m 和n 的值分别是2和0.(2)函数f (x )在(－∞，－1]上为增函数，在(－1,0)上为减函数．证明如下：由(1)可知f (x )＝2x 2＋23x ＝2x 3＋23x.设x 1<x 2<0，则f (x 1)－f (x 2)＝23(x 1－x 2)⎝⎛⎭⎫1－1x 1x 2＝23(x 1－x 2)·x 1x 2－1x 1x 2. 当x 1<x 2≤－1时，x 1－x 2<0，x 1x 2>0，x 1x 2－1>0，∴f (x 1)－f (x 2)<0，即f (x 1)<f (x 2)，∴函数f (x )在(－∞，－1]上为增函数；当－1<x 1<x 2<0时，x 1－x 2<0，x 1x 2>0，x 1x 2－1<0，∴f (x 1)－f (x 2)>0，即f (x 1)>f (x 2)， ∴函数f (x )在(－1,0)上为减函数．所求的函数关系式为⎪⎩⎪⎨⎧≤<+-≤<≤≤=12x 8242x 8x 484x 02x y11、(12分)已知函数f (x )＝ax 2＋bx ＋3a ＋b 为偶函数，其定义域为[a －1,2a ]，求f (x )的值域．解 ∵f (x )是偶函数，∴定义域[a －1,2a ]关于原点对称．∴⎪⎩⎪⎨⎧≤+-≥-+≥-a a a a a 1,312,112∴a ＝13，b ＝0.∴f (x )＝13x 2＋1，x ∈⎣⎡⎦⎤－23，23.∴f (x )的值域为⎣⎡⎦⎤1，3127.物理单元练习1、一颗自由下落的小石头，经过某点时的速度是10m/s ，经过另一点时的速度为30m/s ，求经过这两点的时间间隔和两点间的距离。

Unit 1 TEENAGE LIFE1.1 Reading and Thinking一、基础巩固I．单词拼写1. I'm still the t________ I once was, without the slightest change in my heart.2. When I was little, my parents used to bring home many of these picture books. I a___________ grew up reading these.3. Dancers of the National B_______ of China performed at the NCPA, the first live shows since Jan 19 early in 2020.4. The province has seen a lot of rain and the water c_______ in the soil is high.5.Industry insiders p______ that the unmanned delivery（运送）market Is expected to be worth 100 billion yuan.6. Many U.S. healthcare workers face COVID-19 safety c__________.7. From birth to three years old, children have two very important areas for development: m_________ and language.8.A worker walks through rows of roses in a g___________ while wearing a mask（口罩）to help fight against the CONVID- 19 in Kenya.9. Li and his v____________ friends saved many milu deer from the flood and let them back into the wild.10.He thinks wildlife is neither s________ nor right to raise as pets.II.单词正确形式填空1. It is strongly_________________ (recommend) that the machines should be checked every year.2. 5G will be widely__________ (use) in audio-visual media.3. The Export-Import Bank of China's 570 billion yuan in new loans can also be used ___________________(support ) qualified key foreign-funded companies.4. The guidelines also recommend that theatergoers _____________ (wear) facial masks during shows.5. I know it's hard to understand and it's _____________ (confuse)6.We sincerely wish you and everyone in Annapolis continued good health and great courage during this _____________ (challenge) period.7. China is doing well, much better than the West, and it is clear and ______________(obviously).8. After more than a decade in Guangdong, she __________(quit) her job to return home in 2013.9. "The app is a useful tool for tourists to make holiday plans," said Li Chaoyi, a high school____________ (graduate) in Taiyuan, capital city of the province.10. The__________ (topics) of the lectures always advance with the times, Zhu said, and they are chosen to beclosely related to domestic and international developments.III.短语填空heated debate, prefer to, be suitable for, be responsible for, be confused about,get used to, on schedule, keep up with, used to sign up for1. Do you think the suit I wear for work is suitable for the party?2. Whether to wear masks has become a source of______________3. If you_______________ anything, phone my office.4. Not only you but also he _________________ this unfortunate incident.5. She said with confidence that she could complete the project _______________.6. Two-thirds ______________ teach classes remotely rather than in-person because of the virus.7. More and more villagers who ___________ work outside are returning home.8. More people ______________ online consumption (消费).9. The Chinese government will_____________ the latest news about the COVID-19 outbreak and give out information.10. “I _____________ the tea art class. I feel the tea art classes helped me calm my mind.” she saysIV.翻译1. 他宁愿待在家里也不愿去看电影。

M1 1.一般现在时2.现在进行时1. The fact that so many people still smoke in public places that we may need a nationwide campaign to raise awareness of the risks of smoking.A. suggestB. suggestsC. suggestedD. suggesting2. Look at the pride on Tom’s face. He to have been praised by the manager just now.A seemed B. seems C. had seemed D. is seeming3. —Joan, what in your hand?—Look! It’s a birthday gift for my grandma.A. had you heldB. are you holdingC. do you holdD. will you hold4. Linda, make sure the tables before the guests arrive.A. be setB. setC. are setD. are setting5. hard? Why don’t they stop working?A. Isn’t it rainingB. Hasn’t it rainedC. Won’t it rainD. Wasn’t it raining6. It seldom here but it heavily these days.—When she , I’ll let you know.A. snows; snowsB. snows; is snowingC. is snowing; is snowingD. is snowing; snows7. —How did you like the lectures?—I thought they were .A. interestedB. interestC. interestingD. of interests8. She said nothing. And tears came to her eyes.A. tiredB. tiringC. excitingD. excited9. Mr Smith is a teacher. Everybody is to get close to him.A. frightening; frighteningB. frightened; frightenedC. frightened; frighteningD. frightening; frightened10.The story he told us was very and we were .A. moving; moved deeplyB. moved; moving deeplyC. moving; moved deepD. moved; moving deep11. Though to see us, the professor gave us a warm welcome.A. surprisingB. was surprisedC. surprisedD. being surprised12. He is too careless and he keys.A. always lostB. always losesC. is always losingD. will always lose1-5.BBBCA 6-10.BCDDA M2. 后接V-ing形式作宾语的动词及动词短语1. The thief didn’t admit my bike at first.A. to stealB. to have stolenC. stealingD. to stealing2. Don’t take the medicine. It can’t help rid of your cold.A. gotB. to getC. gettingD. to getting3. Mr Reed made up his mind to devote all he had to some schools for poor children.A. set upB. have set upC. setting upD. having set up4. The foreign friends you referred to looking forward to around our school.A. are; being shownB. being; being shownC. being; showingD. are; be shown5. You should avoid such mistakes next time.A. makingB. to makeC. to makingD. make6. I think he really enjoys English Literature.A. to teachB. teachC. teachingD. with teaching7. I practiced English every morning at university.A. to speakB. speakingC. in speakingD. being spoken8. I spend a lot of time on the Internet every day.A. to goB. goingC. with goingD. go9. Do you have any trouble my house.A. to findB. findingC. with findingD. on finding10. If you without my permission, you’ll be punished.A. insist to goB. insist on goingC. insist goingD. insist go11. As a new driver, I have to practise the car in my small garage again and again.A. so fewB. such fewC. so littleD. such little12. –The are quiet, aren’t they?--Yes. They are accustomed at meals.A. to talkB. to not talkC. to talkingD. to not talking1-5.CBCAA 6-10.CBBBB 11-12AD.M3. 1. 过去分词作定语2.过去时态的表达1. The Town Hall in the 1880’s was the most distinguished building at the time.A. to be completedB. having been completedC. completedD. being completed2. Five people won the “China’s Green Figure” award, a title to ordinary people for their contributions to environmental protection.A. being givenB. is givenC. givenD. was given3. Throughout history, the language by a powerful group spreads across a civilization.A. speakingB. spokenC. to speakD. to be spoken4. —Can those at the back of the classroom hear me?—No problem.A. seatB. sitC. seatedD. sat5. I know a little about Italy as my wife and I there several years ago.A. are goingB. had beenC. wentD. have been6. The flowers were so lovely that they in no time.A. soldB. had been soldC. were soldD. would sell7.—Has your father returned from Africa yet?—Yes, but he there for only three days before his company sent him to Australia.A. wasB. has beenC. will beD. would be8.—Did you tidy your room?—No, I was going to tidy my room but I visitors.A. hadB. haveC. have hadD. will have9. They two free tickets to Canada, otherwise they’d never have been able to afford to go.A. had gotB. gotC. have gotD. get10. With the government’s aid, those by the earthquake have moved to the new settlements.A. affectB. affectingC. affectedD. were affected11. The players from the whole country are expected to bring us honor in this summer game.A. selectingB. to selectC. selectedD. having selected12. When I got on the bus, I I had left my wallet at home.A. was realizingB. realizedC. have realizedD. would realizeBCC 6-10.CAABC 11-15. CBM4. 现在完成时1. This is the first time we a film in the cinema together as a family.A. seeB. had seenC. sawD. have seen2. The population of Jiangsu to more than twice what it was in 1949. The figure is now approaching 74 million.A. has grownB. have grownC. grewD. are growing3. –What do you think of the coffee?--It doesn’t taste like what I before.A. tastedB. have ever tastedC. was tastingD. had ever tasted4. With the help of high technology, more and more new substances in the past years.A. discoveredB. have discoveredC. had been discoveredD. have been discovered5. –How are you today?--Oh, I as ill as I do now for a very long time.A. didn’t feelB. wasn’t feelingC. don’t feelD. haven’t felt6. –How long at this job?.--Since 1990.A. were you employedB. have you been employedC. had you been employedD. will you be employed7. With the rapid growth of population, the city in all directions in the past five years.A. spreadsB. has spreadC. spreadD. had spread8. How can you possibly miss the news? It on TV all day long.A. has beenB. had beenC. wasD. will be9. The old couple have been married for 40 years and never once with each other.A. they had quarreledB. they have quarreledC. have they quarreledD. had they quarreled10. She has set a new record. That is, the sales of her latest book 50 million.A. have reachedB. has reachedC. are reachingD. had reached11. –I didn’t ask for the name list. Why on my desk.--I put it there just now in case you needed itA. does it landB. has it landedC. will it landD. had it landed12. Up to now, the program thousands of children who would otherwise have died.A. would saveB. savesC. had savedD. has saved13. Every year a flood of farmers arrive in Shenzhen for the money-making jobs they before leaving theirhometowns.A. promisedB. were promisedC. have promisedD. have been promised14. Progress so far very good and we are sure that the work will be finished on time.A. wasB. had beenC. has beenD. will be1-5.DABDD 6-10.BBACA 11-15.BDDCM5 比较等级结构1. What a table! I’ve never seen such a thing before. It is it is long.A. half not as wide asB. wide not as half asC. not half as wide asD. as wide as not half2. In my view, London’s not as expensive in price as Tokyo but Tokyo is in traffic.A. the most organizedB. more organizedC. so organized asD. as organized as3. Alan is a careful driver, but he drives of my friends.A. more carefullyB. the most carefullyC. less carefullyD. the least carefully4. There are two buildings, stands nearly a hundred feet high.A. the largerB. the larger of themC. the larger one thatD. the larger of which5. Though he started late, Mr Gao played the piano as well as, if , Mr Zhang.A. not better thanB. not betterC. no better thanD. no better6. The watermelon the Smiths served at dinner would have tasted if it had been put in the fridge for a little while.A. goodB. betterC. bestD. well7. With April 18’s rail way speed up, highway and air transport will have to compete with service for passengers.A. goodB. betterC. bestD. the best8. Work gets done when people do it together, and the rewards are higher too.A. easilyB. very easyC. more easilyD. easier9. The school’s music group will be giving a big show tomorrow night and two on the weekend.A. moreB. otherC. elseD. another10. It looks like the weather is changing for . Shall we stick to our plan?A. the worseB. worseC. the worstD. worst11. During these years travel agencies have succeeded in selling us the idea that the farther we travel, .A. our holiday will be betterB. our holiday will be the betterC. the better our holiday will beD. the better will our holiday be12. —How was your recent trip to Sichuan?—I’ve never had one before.A. a pleasantB. a more pleasantC. a most pleasantD. the most pleasant13. According to statistics, a man is more than twice as likely to die of skin cancer a woman.A. thanB. suchC. soD. as14. — The film is, I have to say, not a bit interesting.—Why? It’s than the films I have ever seen.A. far more interestingB. much less interestingC. no more interestingD. any less interesting1-5.CBDDA 6-10.BBCAA 11-15.CBDAM6 1.合成词2.冠词1. This area experienced heaviest rainfall in month of May.A. /; aB. a; theC. the; theD. the; a2. Washing machines made by China have won worldwide attention and Haier has becomepopular name.A. a; theB. /; aC. /; theD. the; a3. I don’t understand what the engineer means, but I’ve got rough idea of project plan.A. the; aB. /; theC. the; /D. a; the4. What I need is book that contains ABC of oil painting.A. a; /B. the; /C. the; anD. a; the5. It is not good idea to drive for four hours without break.A. a; aB. the; aC. the; theD. a; the6. Students should be encouraged to us Internet as resource.A. /; aB. /; theC. the; theD. the; a7. – I am so sorry to have come late for the meeting.-- It’s not your fault. With rush-hour traffic and heavy rain, it is no wonder you were late.A. a; aB. the; theC. /; /D. /; a8. Have you heard news? The price of petrol is going up again!.A. the; theB. /; theC. the; /D. /; /9. apple fell from the tree and hit him on head.A. An; theB. The; theC. An; /D. The; /10. My neighbor asked me to go for walk, but I don’t think I’ve got energy.A. a; /B. the; theC. /; theD. a; the11. In many places in China, bicycles is still popular means of transportation.A. a; theB. /; aC. the; aD. the; the12. We went right round to the west coast by sea instead of driving across continent.A. the; theB. /; theC. the; /D. /; /13. – Could you tell me the way to Johnsons, please?-- Sorry, we don’t have Johnson here in the village..A. the; theB. the; aC. /; theD. the; /14. walk is expected to last all day, so bring packed lunch.A. A; aB. The; /C. The; aD. A;/ a15. – How about Christmas evening party?-- I should say it was success.A. a; aB. the; aC. a; /D. the; /16. In most countries, a university degree can give you flying start in life.A. the; aB. the; /C. /; /D. /; a17. Everything comes with price; there is no such thing as a free lunch in the world.A. a; aB. the; /C. the; aD. a; /18. If we sit near front of the bus, we’ll have better view.A. /; theB. /; aC. the; aD. the; the1-5.CBDDA 6-10.DBCAD 11-15.CBBCB 16-18. DDC。

高一生物必修1练习题及答案：细胞器作者为大家整理的高一生物必修1练习题及答案：细胞器文章,供大家学习参考！更多最新信息请点击高一考试网一、挑选题1．将白鼠肝细胞磨碎后，放进离心管内高速旋转离心，分成A、B、C、D四层，发觉其中C层中含有呼吸酶，则C层极可能主要由下列哪种成分组成()A．细胞核B．线粒体C．核糖体 D．质体答案：B解析：细胞核是遗传信息库，是细胞代谢和遗传的控制中心，是细胞结构中最重要的部分。

科学研究表明，凡是无核的真核细胞，既不能生长也不能分裂。

核糖体是蛋白质的合成场所；质体是植物细胞中普遍存在的一类细胞器，其中含有叶绿素的质体是叶绿体，不含色素的质体呈白色，叫做白色体；线粒体是活细胞进行有氧呼吸的主要场所，含有大量的呼吸酶。

2．在下列细胞中，含高尔基体和核糖体较多的是()A．肌细胞 B．汗腺细胞C．神经胶质细胞 D．胰腺外分泌部细胞答案：D解析：此题考核高尔基体和核糖体的功能。

核糖体是合成蛋白质的场所，高尔基体与分泌物的形成有关，含两者较多的细胞一定是分泌蛋白质类物质的细胞。

胰腺外分泌部细胞能分泌胰液，其中含多种消化酶，属蛋白质。

而汗腺细胞也有分泌功能，但其分泌物汗液的主要成分是水、无机盐、尿素等，无蛋白质。

肌细胞和神经胶质细胞无分泌功能。

3．在高等植物的叶肉细胞中不存在的细胞器是()A．线粒体 B．高尔基体C．中心体 D．液泡答案：C解析：线粒体和高尔基体存在于所有真核细胞中；中心体存在于动物细胞和低等植物细胞中，高等植物细胞中不存在；液泡在成熟的植物细胞中和某些低等单细胞动物中明显存在，如变形虫细胞质中的食品泡，草履虫中的伸缩泡，高等动物细胞中并不明显。

4．树叶在秋季由绿色变为橙黄色，其原因主要是()A．叶绿体中的色素被破坏B．叶绿素的色彩由绿色变为橙黄色C．原有的色素被破坏，新形成了胡萝卜素D．叶绿体中的叶绿素含量着落，类胡萝卜素的色彩显露了出来答案：D解析：秋季气温降落，叶绿素的合成遭到阻碍，而叶绿素的破坏却与日俱增，为类胡萝卜素在叶片中显露色彩创造了条件。

必修一unit 1 Friendship词汇学习与应用分层作业（30分钟，共31分）一、基础过关：语境填词（共10小题，每小题1分，满分10分）1.I think it’s wrong of you to i___________ the teacher’s opinion.2.As far as I am c____________, I can’t agree with what you have said.3.I came back to school for the ____________ (目的) of being admitted to a better university.4.She suffered from the loss of her pupils’ respect, which ___________ (使不安) her.5.All children like to play ____________ (在户外) instead of staying indoors when the weather is fine.6.Within a few days Mary had become seriously ill, __________ (遭受) great pain.7.I am g___________ to you for your timely help.8.John got married and finally s down in Australia.9.To tell the truth, that’s e_________ what I want.10.After a few days of fever, he began to r___________.二、能力提升：短语活用（共15小题，每小题1分，满分15分）fall in love with, get along with, set down, go through, be concerned about, are tired of, a series of, on purpose, in order to, face to face, calm down, pack up, suffer from, add to, recover from1.The fine day _____________ our pleasure. We had a good time in the country.2.I know there are those in the west who __________________ human rights and religious freedom in China.3.The boy ___________ terribly __________ a heavy fever in the summer.4.We’ve chatted online for some time but we have never met __________________.5.You see, he is so excited. It is hard for him to ___________________.6.The Greens _________________ hard times before liberation.7.It took her a long time to ________________ her heart operation.8.Without giving us a chance to explain, she _______________ and left.9.I _______________ everything that has happened.10.They met at Tom’s party and later on ________________ each other.11._________________ get a good mark I worked very hard before the exam.12.They city is attractive. I _________________ it the first time I visited it.13.You can find _________________ English reading materials in the school library.14.The students ____________________ the examinations, because they are held once a week.15.She sometimes does things ________________ just to annoy me.三、拓展应用：翻译句子（共2小题，每小题3分，满分6分）1.当她听到这个消息时，她激动得什么也不能使她平静下来。

集合的练习题高一数学必修1集合练习题集合是高一数学的基本概念之一，学生需要通过练习深入知道集合内容，才能够在高一数学期末考试中获得好成绩。

下面是作者给大家带来的高一数学必修1集合练习题，期望对你有帮助。

高一数学必修1集合练习题一、挑选题1.下列各组对象能构成集合的有( )①美丽的小鸟;②不超过10的非负整数;③立方接近零的正数;④高一年级视力比较好的同学A.1个B.2个C.3个D.4个【解析】①③中美丽接近零的范畴太广，标准不明确，因此不能构成集合;②中不超过10的非负整数有：0,1,2,3,4,5,6,7,8,9,10共十一个数，是肯定的，故能够构成集合;④中比较好，没有明确的界限，不满足元素的肯定性，故不能构成集合.【答案】 A2.小于2的自然数集用罗列法可以表示为( )A.{0,1,2}B.{1}C.{0,1}D.{1,2}【解析】小于2的自然数为0,1，应选C.【答案】 C3.下列各组集合，表示相等集合的是( )①M={(3,2)}，N={(2,3)};②M={3,2}，N={2,3};③M={(1,2)}，N={1,2}.A.①B.②C.③D.以上都不对【解析】①中M中表示点(3,2)，N中表示点(2,3)，②中由元素的无序性知是相等集合，③中M表示一个元素：点(1,2)，N中表示两个元素分别为1,2.【答案】 B4.集合A中含有三个元素2,4,6，若a A，则6-a A，那么a为( )A.2B.2或4C.4D.0【解析】若a=2，则6-a=6-2=4 A，符合要求;若a=4，则6-a=6-4=2 A，符合要求;若a=6，则6-a=6-6=0 A，不符合要求.a=2或a=4.【答案】 B5.(2013 曲靖高一检测)已知集合M中含有3个元素;0，x2，-x，则x满足的条件是( )A.x 0B.x -1C.x 0且x -1D.x 0且x 1【解析】由x2 0，x2 -x，-x 0，解得x 0且x -1.【答案】 C二、填空题6.用符号或填空(1)22________R,22________{x|x(2)3________{x|x=n2+1，n N+};(3)(1,1)________{y|y=x2};(1,1)________{(x，y)|y=x2}.【解析】 (1)22 R，而22=8 7，22 {x|x 7}.(2)∵n2+1=3，n= 2 N+，3 {x|x=n2+1，n N+}.(3)(1,1)是一个有序实数对，在座标平面上表示一个点，而{y|y=x2}表示二次函数函数值构成的集合，故(1,1) {y|y=x2}.集合{(x，y)|y=x2}表示抛物线y=x2上的点构成的集合(点集)，且满足y=x2，(1,1) {(x，y)|y=x2}.【答案】 (1) (2) (3)7.已知集合C={x|63-x Z，x N}，用罗列法表示C=________.【解析】由题意知3-x= 1， 2， 3， 6，x=0，-3,1,2,4,5,6,9.又∵x N ，C={1,2,4,5,6,9}.【答案】 {1,2,4,5,6,9}8.已知集合A={-2,4，x2-x}，若6 A，则x=________.【解析】由于6 A，所以x2-x=6，即x2-x-6=0，解得x=-2或x=3.【答案】 -2或3三、解答题9.挑选适当的方法表示下列集合：(1)绝对值不大于3的整数组成的集合;(2)方程(3x-5)(x+2)=0的实数解组成的集合;(3)一次函数y=x+6图像上所有点组成的集合.【解】 (1)绝对值不大于3的整数是-3，-2，-1,0,1,2,3，共有7个元素，用罗列法表示为{-3，-2，-1,0,1,2,3};(2)方程(3x-5)(x+2)=0的实数解仅有两个，分别是53，-2，用罗列法表示为{53，-2};(3)一次函数y=x+6图像上有无数个点，用描写法表示为{(x，y)|y=x+6}.10.已知集合A中含有a-2,2a2+5a,3三个元素，且-3 A，求a的值.【解】由-3 A，得a-2=-3或2a2+5a=-3.(1)若a-2=-3，则a=-1，当a=-1时，2a2+5a=-3，a=-1不符合题意.(2)若2a2+5a=-3，则a=-1或-32.当a=-32时，a-2=-72，符合题意;当a=-1时，由(1)知，不符合题意.综上可知，实数a的值为-32.11.已知数集A满足条件：若a A，则11-a A(a 1)，如果a=2，试求出A中的所有元素.【解】∵2 A，由题意可知，11-2=-1由-1 A可知，11--1=12由12 A可知，11-12=2 A.故集合A中共有3个元素，它们分别是-1，12，2.高一数学必修1集合知识点集合的含义：集合这个词第一让我们想到的是上体育课或者开会时老师常常喊的全部集合。