imath第四册答案

Unit 1 CABDD BDAAC AB Unit 2 BCBDC ACAAD BC Unit 3 CABDA CDABA CD Unit 4 ACCAB BCDAA BD Unit 5 CABAB DACBB DD Unit 6 CACCC AAADB AA Unit 7 DCABA BACDA AC Unit 8 BDABD BAABC BC Unit 9 CDBAA CABAC AD Unit 10 CAABD CBBDC AA Unit 11 AABDD DADDB DD Unit 12 CABAC CDACA AB Unit 13 ACDAC BDABC AD Unit 14 DBDCC ACCBD BD Unit 15 CADCD DBACA CA Unit 16 ABCCA DDBAB AC Unit 17 BBADA BBDCD CA Unit 18 BABCD CDCCC BA Unit 19 BBCAD AABDD BC Unit 20 BCADC CCBDB CAUnit 21 BDBBA ADDAB CAUnit 22 CDACB ADBCD ABUnit 23 CADCC DCABC ACUnit 24 AACCB CADDA CDUnit 25 DBADD CACDB CAUnit 26 CBCBA CDDAB ACUnit 27 BCDCC ACCDD DAUnit 28 ADCDA BCADA BDUnit 29 CCADD CCADA BCUnit 30 CABDD BCCAC DCUnit 31 AABAD BADDC BDUnit 32 BDCBA DBDCA BCUnit 33 BDBAD BCCDC BAUnit 34 DCACB DACDB CAUnit 35 CBCAC ABBDC CDUnit 36 ACBCC ACCDB ACUnit 37 CABAC DBCDC BDUnit 38 CAABB ACBDD ABUnit 39 BCADA BDDBD BCUnit 40 DCDAC ADDDA DB新概念英语4答案,新概念英语第四册答案Unit 41 ACACD CBBBD BC Unit 42 BCCBD BDADC AC Unit 43 DBABC CDDAC BB Unit 44 AAAAB BBBDC BA Unit 45 CADAC CACDC DC Unit 46 BBDBD ABCDA BD Unit 47 CAADB CACDB BC Unit 48 CCBCC CCDBA AB。

SectionB LESSON2&LESSON3必备知识基础练Ⅰ.单句填空1.He was on the point of saying something the phone rang.2.The spectacular sunrise made us exclaim surprise.3.But that’s not as bad a story I heard the other day.4.You might have been able to make guess at who she was.5.We helped the old clean their houses and chattedthem.Ⅱ.短语填空1.He me for not having done anything and criticised me yesterday.2.She would like this mess as soon as possible.3.Peter his job and decided to call it quits.4. ,it is important to create a positive attitude.5. the switch when anything goes wrong with the device.6. ,you have to readjust your expectations.7.A working party has been to look into the problem.Ⅲ.翻译句子1.我方领导人已经决定与敌方进行进一步的谈判。

(negotiate with)2.她周游世界,好像钱不是问题似的。

(as if)3.积极思考是处理压力的好方法之一。

(deal with)4.昨天,我向孩子承诺,如果他这次考好了就带他去海边玩。

(do well in)5.今天教授不能来了,所以我将代表他讲话。

高中第四册数学期末考试卷答案2021年高中第四册数学期末考试卷答案【】多了解一些考试资讯信息，关于先生和家长来讲十分重要，查字典数学网为大家整理了2021年高中第四册数学期末考试卷答案一文，希望对大家有协助。

一、选择题(本大题共12小题，每题4分，共48分)1.B2.C3.D4.C5.D6.C7.A 8.C 9.A 10.A 11.D 12.B二、填空题(本大题共4小题，每题4分，共16分)13.14.15. 增函数的定义16. 与该平面平行的两个平面三、解答题(本大题共3小题，每题12分，共36分)17.(本小题总分值12分)解：(Ⅰ)触及两个变量，年龄与脂肪含量.因此选取年龄为自变量，脂肪含量为因变量 .作散点图，从图中可看出与具有相关关系.┄┄┄┄┄┄┄┄┄┄┄┄6分(Ⅱ) 对的回归直线方程为当时，， .当时，， .所以岁和岁的残差区分为和 .┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄12分18 (本小题总分值12分)证明：由于，，所以只需证明 .展开得，即 .所以只需证 .由于显然成立，所以.┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄12分本文导航 1、首页2、高中第四册数学期末考试卷答案-23、高中第四册数学期末考试卷答案-34、高中第四册数学期末考试卷答案-419.20.(1) 的列联表：性别休闲方式看电视运动总计女 45 25 70男 20 30 50总计 65 55 120性别休闲方式看电视运动总计女 45 25 70男 20 30 50总计 65 55 1206分(2)假定休闲方式与性别有关 7分计算 10分由于，而， 11分所以有理由以为假定休闲方式与性别有关是不合理的。

即有的掌握以为休闲方式与性别有关。

12分21. (本小题总分值12分)证明：(Ⅰ)由于，所以 .由于函数是上的增函数，本文导航 1、首页2、高中第四册数学期末考试卷答案-23、高中第四册数学期末考试卷答案-34、高中第四册数学期末考试卷答案-4所以 .同理， .两式相加，得.┄┄┄┄┄┄┄┄┄┄┄┄6分(Ⅱ)逆命题：假定，那么 .用反证法证明假定，那么所以 .这与矛盾.故只要，逆命题得证.┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄12分22(本小题总分值14分)解：(Ⅰ)由于，且 .所以当时，得，故 .从而.┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄6分(Ⅱ)数列不能够为等差数列，证明如下：由，得假定存在，使为等差数列，那么，即，解得 .于是， .这与为等差数列矛盾.所以，对恣意，数列都不能够是等差数列.┄┄┄┄┄┄┄┄┄┄┄┄14分2021年高中第四册数学期末考试卷答案就为您引见完了，查字典数学网的编辑将第一时间为您整理信息，供大家参考!。

SectionⅢWritingWorkshop,ViewingWorkshop&ReadingClub一、用适当的介词或副词填空1.Self-criticism is beneficial your growth.2. addition,such a child shouldn’t be put in such a noisy place.3.It was his carelessness that resulted such a terrible accident.4.Many public places ban citizens smoking.5.The young player was taken the team because of his bad habits.6.When he was playing football with his classmates,he fella coma.7.A young man robbed the old woman her new bag the other day.8.It will take the patient a long time to returnnormal.二、用方框中所给短语的正确形式填空1.Her parents her plan to work in the remote mountain village.2.College students come from social backgrounds.3. ,teenagers should form a good habit of learning.4. ,most of his members were not in favour of him.5.It is hard for him to his family.6.What was it that such a great loss to the company?7.A good diet health.8.Selling the old house a large amount of money to him.三、阅读理解AThe elderly residents(居民) in care homes in London are being given hens to look after to stop them feeling lonely.The project was dreamed up by a local charity(慈善组织) to reduce loneliness and improve elderly people’s well-being.It is also being used to help patients suffering dementia,a serious illness of the mind.Staff in care homes have reported a reduction in the use of medicine where hens are in use.Among those taking part in the project is 80-year-old Ruth Xavier.She said: “I used to keep hens when I was younger and had to prepare their breakfast each morning before I went to school.“I like the project a lot.I am down there in my wheelchair in the morning letting the hens out and down there again at night to see they’ve gone to bed.“It’s good to have a different focus.People have been bringing their children in to see the hens and residents come and sit outside to watch them.I’m enjoying the creative activities,and it feels great to have done something useful.”There are now 700 elderly people looking after hens in 20 care homes in the North East,and the charity has been given financial support to roll it out countrywide.Wendy Wilson,eanager at 60 Penfold Street,one of the first to embark on the project,said:“Res idents really welcome the idea of the project and the creative sessions.We are looking forward to the benefits and fun the project can bring to people here.”Lynn Lewis,director of Notting Hill Pathways,said:“We are happy to be taking part in the project.It will really help connect our residents through a shared interest and creative activities.”1.What is the purpose of the project?A.To ensure harmony in care homes.B.To provide part-time jobs for the aged.C.To raise money for medical research.D.To pro mote the elderly people’s welfare.2.HowhastheprojectaffectedRuthXavier?A.Shehaslearnednewlifeskills.B.Shehasgainedasenseofachievement.C.Shehasrecoveredhermemory.D.Shehasdevelopedastrongpersonality.3.Whatdotheunderlinedwords“embarkon”meaninparagraph7?A.Improve.B.Oppose.C.Begin.D.Evaluate.4.Whatcanwelearnabouttheprojectfromthelasttwoparagraphs?A.Itiswellreceived.B.Itneedstobemorecreative.C.Itishighlyprofitable.D.Ittakesagestoseetheresults.BYoung people and older people do not always agree.They sometimes have different ideas about living,working and playing.But in one special programme in New York State,adults and teenagers live together in a friendly way.Each summer 200 teenagers and 50 adults live together for eight weeks as members of a special work group.Everyone works severalhours each day.They do so not just to keep busy but to find meaning and fun in work.Some teenagers work in the forests or on the farms near the village.Some learn to make things like tables and chairs and to build houses.The adults teach them these skills.There are several free hours each day.Weekends arefree,too.During the free hours some of the teenagers learn photo-taking or drawing.Others sit around and talk or sing.Each teenager chooses their own way to pass their free time.When people live together,they should have rules.In this programme the teenagers and the adults make the rules together.If someone breaks a rule,the problem goes before the whole group.They talk about it and ask,“Why did it happen?W hat should we do about it?”One of the teenagers has said something about it,“You have to stop thinking only about yourself.You learn how to think about the group.”5.In one special programme in New York State,young people and older people .A.don’t wo rk well togetherB.are friendly to each otherC.teach each other new ways of building housesD.spend eight weeks together,working as farmers6.All the members work some time every day mainly to .A.lead a busy lifeB.learn new skills of farmingC.get used to the life on the farmsD.find useful things and pleasure in work7.Living together, .A.the teenagers don’t have to obey the rulesB.the members have to obey the rules the adults makeC.the members have no free time but on weekendsD.the members should observe the rules they make together8.The best title for the passage is “”.A.Adults and teenagers live together in a friendly wayB.Life in New York StateC.Teenagers and adultsD.Free hours in the special work group四、七选五阅读理解Today it is common to see people who walk about with coloured wires hanging from their ears wherever they go.They move about in their personal bubbles,sometimes unaware of what’s happening around them. 1 Outside life is shut out.So are you one of “them”?For me,walking around in my own personal bubble is perfect.2 What’s even better,wearing earphones seems to give a signal to people which says:“I’m not available for chatting at the moment!”Suppose you’re at work and about to make an incredible breakthrough,but a colleague suddenly turns up.At this precise moment,the slightest disturbance would break your concentration.3 Once again,those wires hanging from your ears would be sure to give that “Go away!” signal.4 It’s probably part of the growing up stage when the y just want to ignore their whole family.While their mothers give themlectures about why they should do their homework,they can just turn up the volume(音量) on their MP3 player,smile,and say “Yes,Mum.” The problem is solved.Pretty soon,not only will we have pretty coloured wires hanging from our ears—but also our brains will be directly plugged into some new high-tech instrument.We’ll be in a virtualworld,communicating with everyone else,or choosing not to,as we like.In this world,we will all be permanently plugged in. 5 And they are changing our social habits along the way.In the end,there is a thin line between using technology as a tool for making life better and being a slave to it!It’s so strange—suddenly,I don’t feel like wearing my earphones any more!A.Our instruments are changing quickly.B.I also have wires hanging from my ears.C.In the home situation,teenagers love these wires.D.I don’t have to deal with the noise from the environment.E.After all,I am listening to my favourite music and would rather not be disturbed.F.Listening to music through earphones is the perfect way to ignore such interruptions.G.They walk around in their own spaces,with their personal “digital noise reduction systems”.五、语篇填空The relationship between parents and children has always been a hot topic.Many students may feel 1. (stress) because of their parents.Most parents have good intentions,2.some of them aren’t very helpful with the problems their sons and daughters have in 3. (adjust) to college,and a few of them seem to go out of their way to add to their children’s 4. (difficult).For one thing,parents are often not aware of the kinds of problems their children face.They don’t realise that the 5.(compete) is stronger,that the required standards of work are 6.(high),and that their children may not be prepared for 7. change.They may be upset by their children’s poor grades.At their kindest,they may 8.(gentle) ask why John or Mary isn’t doing better,whether he or she is trying as hard as he or she could,and so on.At their worst,they may threaten 9. (take) their children out of college or cut off living eetimes parents think it right and natural that they determine 10. their children should do with their lives.They forget that everyone is different and that each person must develop in his or her own way.六、选词创境请用本单元重点词汇完成一篇小短文。

ContentsUnit One Music WorldDialoguePassage A Influential Classic Rock Bands and Performers (I) Passage B Influential Classic Rock Bands and Performers (II) Grammar 非谓语动词–动词现在分词和过去分词四级新题型练习Unit Two Childhood MemoryDialoguePassage A Investing in MemoriesPassage B TomboyGrammar 非谓语动词–动词不定式和动名词四级新题型练习Unit Three MiraclesDialoguePassage A Wonders of the World: the Building of 2006Passage B The Great PyramidGrammar 省略和倒装四级新题型练习Unit Four PlantsDialoguePassage A The Importance of Plans and Plant CommunitiesPassage B What Is a Tree?Grammar 虚拟语气（一）四级新题型练习Unit Five MilitaryDialoguePassage A West PointPassage B Special Operations Forces – An NCO Perspective Grammar 虚拟语气（二）四级新题型练习Unit Six LanguagesDialoguePassage A Did You Hear about?Passage B Language & Geographical EnvironmentGrammar 定语从句四级新题型练习Unit Seven BeautyDialoguePassage A Is Beauty in the Eye of the Beholder?Passage B Hair Care: Beautiful HairGrammar 名词性从句（一）四级新题型练习Unit Eight VirtuesDialoguePassage A The Importance of Being HonestPassage B How to Face ChallengesGrammar 名词性从句（二）四级新题型练习Unit Nine MediaDialoguePassage A Mass MediaPassage B The Influence of the MediaGrammar 状语从句四级新题型练习Unit Ten HistoryDialoguePassage A Ancient Chinese ReligionPassage B HistoryGrammar 动词的时态四级新题型练习Unit Eleven Cities and VillagesDialoguePassage A Theories of City LivingPassage B Illusions of Pastoral PeaceGrammar 形容词和副词四级新题型练习Unit Twelve ServicesDialoguePassage A The Art of Customer ServicePassage B A New Service on Its WayGrammar 动词的语态四级新题型练习Unit One Music WorldExercises to the textI. Answer the following questions:1. Elvis Presley is the first singer to expose mainstream America to something other than traditional family music.2. B ecause Elvis‟ songs sounded “too Negro” for white stations to air.3. Elvis‟ sound and his performance made him a controversial singer.4. they are John Lennon, Paul McCartney, Ringo Star, and George Harrison.5. They began their career in England, and when they came to America, they were already a huge success in the United States.6. In 1966, the touring days of the Beatles ended.7. Their very loud stance on drug use and war made them a controversial group.8. The Beatles were more popular than Jesus Christ.II. Fill in the blanks with the right forms of the given words:1. fundamental2. influential, influential3. successful4. opposition5. hesitation6. inspiration7. suggestive 8. innovative 9. loyalty 10. admirationIII. Put the following sentences into Chinese, paying attention to the meanings of the italic words:classic1. 我刚读过一本最佳的小说.adj. 经典的, 最优秀的2. 这是一个营养不良的典型病例.adj. 典型的3. 跑步是体育运动日程表中传统比赛项目之一.adj. 传统的4. 那场足球比赛堪称典范.n. 优秀的典范trace1. 警察不能发现歹徒的任何踪迹.n. 踪迹2. 他说话时毫不动感情.n. 极微的量3. 我查不到你提到的那封信.v. 查出4. 他追踪自己的世系上溯至一个古老的诺曼家族.v. 找出某事的根源while1. 我很快会返回.n. 一段时间2. 我们在机场阅读杂志消磨时间.v. 逍遥自在地度过(一段时间)3. 他做着功课就睡着了.conj. 当…的时候4. 我爱喝清咖啡而他喜欢奶油的.conj. 而(用于表示对比或相反的情况) certain1. 他一定同意.adj. 无疑;确信2. 他们除非今天获救, 否则必死无疑.adj. 一定会来到, 发生; 有把握的3. 恐怖分子只有在某些条件下才释放人质.adj. 某种4. 她对我的态度有点冷淡.adj. 稍微有点act1. 帮助盲人过马路是做好事.n. 行为;举动2. 今晚有一场杂技表演.n. 表演3. 议会通过了一项法案, 规定这些娱乐是非法的.n. 法案4. 没有时间再说了, 我们必须采取行动.v. 做某事;采取行动credit1. 本商店不能赊购.n. 赊购2. 我不能接受任何荣誉, 所有的工作都是别人做的.n. 成绩;奖赏;称赞3. 谣言越传越真.n. 相信;信任;信赖4.英语课的学分很难取得.n. 学分IV. Complete the following sentences, using the expressions in the brackets:1. be traced back to a childhood accident2. had a great impact3. stand at the forefront of the computer software4. other than to ask me for something5. It is in the place that6. managed to take hold of the jug7. make this place a really beautiful roomV. Translate the following sentences into English:1. He denied any connections with the robbery.2. If one parent died, the family was likely to break up.3. I sat at the front of the cinema, but someone sat right in front of me and I could n‟t see anything.4. W hile I can understand what you said, I can‟t go along with you.5. It was on Saturday afternoon that we had the match.Passage BComprehension checkChoose the best answer to each of the following questions/ sentence(s):1. B2. D3. B4. B5. AGrammarExercisesI. Fill in the blanks with the right forms of the given words:1. done, involved2. invited, engaging3. escaped4. trying5. standing6. disappointed7. teaching, learning 8. assumed, having 9. working10. reported, knownII. Choose the best answer from the four choices to complete each of the following sentences:1. B2. B3. A4. A5. C6. B7. C8. A9. B 10. A11. D 12. B 13. C 14. B 15. D16. B 17. B 18. D 19.B 20. C四级新题型练习ClozeDirections: There are 20 blanks in the following passage. For each blank there are four choices marked A, B, C and D. You should choose the ONE that best fits into the passage.1. C2. A3. B4. C5. D6. B7. C8. C9. B 10. A11. B 12. A 13. D 14. B 15. A16. A 17. B 18. C 19. A 20. DUnit Two Childhood MemoryExercises to the textI. Answer the following questions:1. Because his uncle has died and the rest of the paragraph is the author‟s memory about his childhood.2. He might be seventy years old.3. They used to go to the sea to have their trips.4. He used to buy the railway tickets and write special programmes long before the day arrived so we began to look forward to the trip.5. For example, they had the annual ladies vs. gentlemen football match and so on.6. It would be an old sporting cup from a local junk shop.7. Neighbors and their children would also be invited.8. Because it is investing in memories.II. Fill in the blanks with the right forms of the given words:1. investment2. memorized3. behaviour4. wonderful5. humorous6. invitation7. choice 8. puzzled 9. complaint 10. competitionIII. Put the following sentences into Chinese, paying attention to the meanings of the italic words:cover1. 她双手掩面。

SectionⅡLesson2DealingwithConflict&Lesson3WarMemories一、用适当的介词或副词填空1.I don’t know how the young man will respond the news.2.She had an accident and was injured the left leg.3.My mother always reminds me to concentrate my lessons.4.Before I picked the phone,he had left the room.5.I will attend the grand party behalf of my parents.6.The boy,together his classmates,went to greet the famous scientist.7.My son is fed up his study.What should I do to help him?二、用所给单词的适当形式填空1.These measures are (firm) supported by environmental groups.2.A lot of visitors enjoyed the paintings (display) in the gallery.3.The ship began to shake (violent) when the wind got stronger.4.He used the money (withdraw) from the bank to buy some books.5.One of the (represent) came to visit the injured in the accident.三、完成句子1.The old professor was walking along the road,(他的宠物狗跟在他后面).2.Don’t worry!I will(让人把货送到你家) as soon as possible.3.This award is given (为感谢) her huge contribution to the film business.4.The team decides(钱如何分配) among the poor people.5.It is natural that people will (陷入恐慌) at such terrible news.四、阅读理解AFarmer John and Farmer Bob were neighbours.For more than 30 years,they had been getting along very well.Then their good relationship broke.It began with a small thing,then bitter words,and then weeks of silence.One morning Farmer John woke up to find a stream between the two farms.“It must be Bob,” John thought.Then one day there was a knock on John’s door.He opened it to find a carpenter standing at the doorway.“I’m looking for a few days’ work,” the carpenter said.“I do have a job for you,” John said.“Look across the stream at that farm.That’s my neighbour Bob.He dug a stream between the two farms.I want you to build a fence—an 8-foot fence.I don’t want to see his place or his fa ce any more.I don’t have such a neighbour!”The carpenter said,“I think I know what to do,sir,and I’ll be able to do a job that pleases you.”Farmer John helped the carpenter get the materials ready and then he was off for the day.When the farmer returned,the carpenter had just finished his job.The farmer’s eyes opened wide.There was no fence there at all!It was a bridge!And the neighbour,Bob,was coming across,with his hand outstretched(伸出).“Hi,John!You’re quite a fellow to build this bridge!”Then they m et in the middle,taking each other’s hands.“I’m terribly sorry for what I have said and done.We should be good to each other,” said Farmer Bob.Then they turned to see the carpenter,who was ready togo.“No,wait!Stay a few days.I have a lot of other jobs for you,” said Farmer John.“I’d love to stay,” the carpenter said,“butI have more bridges to build.”1.Just before the carpenter came, John and Bob each other.A.didn’t speak toB.got along well withC.often fought withD.never had bitter words with2.Farmer John asked the carpenter to build a fencebecause .A.he wanted to protect his farmB.he didn’t intend to do it himselfC.he would like to avoid BobD.he planned to find him something to do3.What does the underlined sentence “You’re quite a fellow to build this bridge!” mean?A.John was great to build this bridge.B.John was not good at building bridges.C.John was foolish to build such a bridge.D.John should have built the bridge earlier.4.What is the best title for the passage?A.What a big fence!B.A strong bridge over the streamC.Three kind menD.A fence or a bridge?BFor many parents,raising a teenager is like fighting a long war,but years go by without any clear winner.Like a border conflict between neighbouring countries,the parent-teen war is about boundaries: Where is the line between what I control and what you do?Both sides want peace,but neither feels it has any power to stop the conflict.In part,this is because neither is willing to admit any responsibility for starting it.Fr om the parents’ point of view,the only cause of their fight is their adolescents’ complete unreasonableness.And of course,the teens see it in ee way,except oppositely.Both feel trapped.In this article,I’ll describe three no-win situations that commonly arise between teens and parents and then suggest some ways out of the trap.The first no-win situation is quarrels overunimportant things.Examples include the colour of the teen’s hair,the cleanliness of the bedroom,the preferred style of clothing,the child’s failure to eat a good breakfast before school,or his tendency to sleep until noon onweekends.Second,blaming:the goal of a blaming battle is to make the other admit that his bad attitude is the reason why everything goes wrong.Third,needing to be right.It doesn’t matter what the topic is—politics,the laws of physics,or the proper way to break an egg—the point of these arguments is to prove that you are right and the other person is wrong,for both wish to be considered an authority and therefore to command respect.Unfortunately,as long as parents and teens continue to assume that they know more than the other,they’ll continue to fight these battles forever and never make any real progress.5.Why does the author compare the parent-teen war to a border conflict?A.Both can continue for generations.B.Both are about where to draw the line.C.Neither has any clear winner.D.Neither can be put to an end.6.What does the underlined part in Paragraph 2 mean?A.The teens blame their parents for starting the conflict.B.The teens agree with their parents on the cause of the conflict.C.The teens accuse their parents of misleading them.D.The teens tend to have a full understanding of their parents.7.Parents and teens want to be right because they want to .A.give orders to the otherB.know more than the otherC.gain respect from the otherD.get the other to behave properly8.What will the author most probably discuss in the paragraph that follows?A.Causes of the parent-teen conflicts.B.Examples of the parent-teen wars.C.Solutions to the parent-teen problems.D.Future of the parent-teen relationship.五、语篇填空Like most people,I was brought up to look upon life as progress of getting.It was not until in my later thirties 1. I made this important discovery:giving away things 2. (make) life so much more eade about giving away is that it is almost impossible to give away anything in this world without 3.(get) something back,though the return often comes in 4.une.One Sunday morning the local post office delivered a letter to my home,though it 5. (address) to me at my office.I wrote the postmaster a note of 6.(appreciate).More than a year later I needed a post office box for a new business I was starting.I was told at the window that there were no boy name would have to go on a long waiting list.As I was about to leave,the postmaster appeared in the doorway.He had overheard our conversation.“Wasn’t it you that wrote us a letter a year ago about a special 8.(deliver) to your home?”I said yes.“Wel l,you are 9. (certain) going to havea boake one for you.You don’t know 10. a letter like that means to us.We usually get nothing but complaints.”六、七选五阅读理解AFewTipsforSelf-AcceptanceWe all want it...to accept and love ourselves.But at times it seems too difficult and too far out of reach. 1 Here are a handful of ways that will set you in the right direction.● 2 Do not follow the people who make you feelnot-good-enough.Why do you follow them?Are you hoping that eventually you will feel empowered because your life is better than theirs?Know that your life is your own;you are the only you in this world.●Forgive yourself for mistakes that you have made.We are often ashamed of our shortcomings,our mistakes and our failures. 3 You will make mistakes,time and time again.Rather than getting caught up in how you could have done better,why not offer yourself a compassionate(有同情心) response?“That didn’t go as planned.But,I tried my best.”●Recognize all of your strengths.Write them down in a journal.Begin to train your brain to look at strength before weakness.List all of your accomplishments and achievements.You have a job,earned your degree,and you got out of bed today. 4●Now that you’ve listed your strengths,list your imperfections.Turn the page in your journal.Put into words why you feel unworthy,and why you don’t feel good enough.Now,read these words back to yourself. 5 Turn to a page in your journal to your list of strengths and achievements.See how awesome you are?A.Feeling upset again?B.Where do you start?C.Nothing is too small to celebrate.D.Remember,you are only human.E.Set an intention for self-acceptance.F.Stop comparing yourself with others.G.When does the comparison game start?SectionⅡLesson2DealingwithConflict&Lesson3WarMemories一、1.to 2.in 3.on 4.up 5.on 6.with7.with二、1.firmly 2.displayed 3.violently 4.withdrawn5.representatives三、1.with his pet dog following him 2.have your goods delivered to your house 3.in appreciation of4.how the money is distributed5.get into panic四、1.A 细节理解题。

高中第四册数学期末试题答案解析2021年高中第四册数学期末试题答案解析【】查字典数学网高中频道的编辑就为您预备了2021年高中第四册数学期末试题答案解析一、选择题(每题5分，共60分，以下每题所给选项只要一项契合题意，请将正确答案的序号填涂在答题卡上)1.下面事情：①延续两次掷一枚硬币，两次都出现正面朝上;②异性电荷，相互吸引;③在规范大气压下，水在100℃结冰，是随机事情的有 CA.②;B.③;C.①;D.②、③2. 是的 AA.充沛不用要条件B.必要不充沛条件C.充要条件D.既不充沛又不用要条件3.以下各数中最小的数是 DA.85(9)B.210(6)C.1000(4)D.111111(2)4.数据a1，a2，a3，，an的方差为A，那么数据2a1，2a2，2a3，，2an的方差为 DA.A/2B.AC.2AD.4A5.在长为10 cm的线段AB上任取一点P，并以线段AP为边作正方形，这个正方形的面积介于25 cm2与49 cm2之间的概率为 BA. B. C. D.6.某校高中生共有900人，其中高一年级300人，高二年级200人，高三年级400人，现采用分层抽样抽取一个容量为45的样本，那么高一、高二、高三各年级抽取人数区分为 D A.15，5，25 B.15，15，15 C.10，5，30 D.15，10，20n=0while n100n=n+1n=n*nwendprint nend7.运转右图顺序时,WHILE循环体内语句的执行次数是 BA.5B.4C.3D.98.命题P：，那么为 AA. B.C. D.9.设圆C与圆外切，与直线y=0相切，那么C的圆心轨迹为 AA.抛物线B.双曲线C.椭圆D.圆10.设双曲线的渐近线方程为，那么的值为 ( C)A.4B.3C.2D.111.F是抛物线的焦点，A，B是该抛物线上的两点， ,那么线段AB的中点到y轴的距离为 ( B)A. B. 1 C. D.12.某人射击5枪，命中3枪，3枪中恰有2枪连中的概率为( A )A. B. C. D.第二卷(非选择题共90分)二.填空题(本大题共4个小题，每题5分，共20分)13.用秦九韶算法计算当x=5时多项式f (x)=5 +4 +3 +2 +x+1的值 18556 .14 .对某电子元件停止寿命追踪调查，状况如下.寿命(h) 100～200 200～300 300～400 400～500 500～600 个数 20 30 80 40 30估量元件寿命在100～400 h以内的在总体中占的比例 0.6515.命题为假命题，那么实数的取值范围为16.从装有5只红球、5只白球的袋中任意取出3只球，有事情：① 取出2只红球和1只白球与取出1只红球和2只白球② 取出2只红球和1只白球与取出3只红球③ 取出3只红球与取出3只球中至少有1只白球④ 取出3只红球与取出3只白球.其中是统一事情的有 3三.解答题(共6各小题，第17题10分，其他12分，共70分)17.求证：ABC是等边三角形的充要条件是a2+b2+c2=ab+ac+bc， (a,b,c是ABC的三条边.)证：充沛性：假定ABC是等边三角形，那么有a=b=c成立，左边=3a2=左边必要性：假设有a2+b2+c2=ab+ac+bc，那么两边同乘以2得2a2+2b2+2c2= 2ab+2bc+2ca，整理得(a-b)2+(b-c)2+(c-a)2=0故有a=b=c成立，即三角形是等边三角形18.(本小题总分值12分)某迷宫有三个通道，进入迷宫的每团体都要经过一扇智能门.初次抵达此门，系统会随机(即等能够)为你翻开一个通道.假定是1号通道，那么需求1小时走出迷宫;假定是2号、3号通道，那么区分需求2小时、3小时前往智能门.再次抵达智能门时，系统会随机翻开一个你未到过的通道，直至走出迷宫为止.(1)求走出迷宫时恰恰用了l小时的概率;(2)求走出迷宫的时间超越3小时的概率.解：(1)设A表示走出迷宫时恰恰用了1小时这一事情，那么 .(2) 设B表示走出迷宫的时间超越3小时这一事情，那么 .19. 对甲、乙两名自行车赛手在相反条件下停止了6次测试，测得他们的最大速度(m/s)的数据如下表.甲 27 38 30 37 35 31乙 33 29 38 34 28 36(1)画出茎叶图，由茎叶图你能取得哪些信息?(2)区分求出甲、乙两名自行车赛手最大速度(m/s)数据的平均数、中位数、规范差，并判别选谁参与竞赛更适宜. 解：(1)画茎叶图，中间数为数据的十位数?从这个茎叶图上可以看出，甲、乙的得分状况都是散布平均的，只是乙更好一些;乙的中位数是35，甲的中位数是33.因此乙发扬比拟动摇，总体得分状况比甲好.?(2) =33， =33; =3.96， =3.56;甲的中位数是33，乙的中位数是35. 综合比拟选乙参与竞赛较为适宜.20.假定关于某设备的运用年限x和所支出的维修费用y(万元)，有如下表的统计资料：运用年限x 2 3 4 5 6维修费用y 2.2 3.8 5.5 6.5 7.0假定由资料可知y对x呈线性相关关系，试求：(3) 线性回归直线方程;(4) 估量运用年限为 10年时，维修费用是多少?Y=1.23x+0.08 12.38万21.椭圆C的左右焦点区分是( ，0)，( ，0)，离心率是，直线y=t与椭圆C交于不同的两点M,N，以线段MN为直径作圆P，圆心为P.(1)求椭圆C的方程(2)假定圆P与x轴相切，求圆心P的坐标.解：(Ⅰ)由于，且，所以所以椭圆C的方程为(Ⅱ)由题意知由得所以圆P的半径为解得所以点P的坐标是(0， )22.(本小题总分值12分)斜率为1的直线与双曲线交于两点，的中点为 . (I)求的离心率;(II)设的右顶点为 ,右焦点为 , ,证明：过的圆与轴相切.(Ⅰ)由题设知，的方程为：，代入C的方程，并化简，得，设，那么①由为BD的中点知，故即，②故所以C的离心率(Ⅱ)由①②知，C的方程为：，故无妨设，又，故，解得，或 (舍去)，故，连结MA，那么由，知，从而 ,且轴，因此以M为圆心，MA为半径的圆经过A、B、D三点，且在点A处与轴相切，所以过A、B、D三点的圆与轴相切.只需大家用心学习，仔细温习，就有能够在高考的战场上考取自己理想的效果。

SectionⅡLearning About Language一、完成句子1.问题是你想做什么。

.,ILast night she didn’t go to the dancehas been worked out.You mustn’t forceHe is reading an.on time.1.By the end of the century,we will have discovered other places in our solar system suitable for living and we will have discovered ways to go further into space.【翻译】【句式分析】【句式分析】本句是由并列连词and连接的并列句,By引导时间状语,suitable for living做other places的后置定语,to go further into space做ways的后置定语。

2.In today’s world,winners are celebrated and treated as heroes,but if doping and genetherapy continue to affect the outcomes of major sporting events,the word “hero” will have lost all meaning.【翻译】【句式分析】【句式分析】本句是由转折连词but连接的并列复合句,第二个分句中包含一个if引导的条件状语从句。

3.Treatments for jellyfish stings and snakebites have also been developed and in the last five years there have been only three deaths from jellyfish stings and about the same number from snakebites.【翻译】【句式分析】【句式分析】本句是由并列连词and连接的并列句,第一个分句运用了现在完成时的被动语态。

外研版（2019）高中英语必修选择性第四册Unit 4 同步练习题(限时：65分钟)Ⅰ.完形填空When Brian and Lauren got married last November, one very important person was missing: Brian's 91-year-old grandmother, Peg.After breaking her ankle, she was unable to __1__ it to the couple's special day.Peg was living for this wedding.__2__ being at the hospital, she dressed up in an amazing outfit that day.About 2 hours before the ceremony, the couple decided to visit Peg.I, as their photographer, asked them if they wanted me to __3__ them.At first, I really felt that it was their personal __4__ and I didn't want to __5__ in any way.But they wanted me to come and __6__ the moment.When they walked into that room, Peg was so __7__ to see the couple.She kept saying “I can't believe you're here! ”I was closely following Lauren and Brian into the room，__8__ I didn't miss Peg's every __9__．Upon seeing them, her face just __10__．There wasn't a dry eye in the room.This is what __11__ are all about —family and love.On their big day, the couple spared time to visit Peg and made her the __12__ grandma in the world.This was __13__ an amazing moment and I'm thankful to photograph them.Just a month later, Peg __14__．On that day, I realized what I had done was really special for this family.Being able to give the family something that they can look back on, I am __15__ with the occupation I have chosen.1．A.explain B．makeC．admit D．prepare2．A.In spite of B．In case ofC．In consequence of D．In terms of3．A.invite B．persuadeC．encourage D．accompany4．A.question B．occasionC．opportunity D．agreement5．A.disturb B．cheatC．worry D．complain6．A.memorize B．enjoyC．capture D．acknowledge7．A.weak B．surprisedC．lucky D．relieved8．A.so that B．even ifC．unless D．though9．A.suggestion B．promiseC．reaction D．conclusion10．A.swelled up B．cleaned upC．turned up D．lit up11．A.manners B．conversationsC．experiments D．weddings12．A.nicest B．most considerateC．happiest D．most intelligent13．A.possibly B．regularlyC．hardly D．absolutely14．A.moved away B．drove awayC．passed away D．broke away15．A.content B．strictC．concerned D．patientⅡ.语法填空Go (围棋) is a board game for two players, in which the aim is to surround more territories than the competitor.The game __1__(invent) in China more than 4，000 years ago and is believed to be the __2__ (old) board game continuously played to the present day.A survey found that there are over 60 million current players in the world, the majority of __3__ live in East Asia.The playing pieces are called “stones”．One player uses the white stones and __4__ other black.The players take __5__ (turn) to place the stones on the vacant intersections (交点) of a board.Once __6__ (place) on the board, stones may not be moved, but stones are removed __7__ the board if “captured (捕获)”．Capture happens when a stone is surrounded by opposing ones on all points.The game goes on until neither player wishes to make another move.When a game __8__ (come) to an end, the winner is determined by __9__ (count) each player's surrounded territories along with captured stones and komi (贴目).A teacher might __10__ (simple) the explanation by saying to a student “you may place your stone on any point on the board, but if I surround that stone, I will remove it”．III写作强化增分专练——练规范第一节假定你是李华，你校最近举办了一场邀请留学生参加“感受中国传统文化”的活动，请你给某英文报社写一篇新闻稿进行投稿。

Structure 句型Lesson 15 in some part of the world people are still____b__ to writeA incapable b impotent c enable d unable6 they can preserve their history _____d_ down legendsA by hand b by handing c to hand d in hand7the ____a__ why these legends are useful is that they tell us about migrationsA cause b effect c why d reason8 there weren't ___a___ of then who could write down what they did.A any b none c no one d noLesson 25 it would ____a__ impossible for us to live in this world if insects had no enemies.A make it b stay c be d have it6 we owe __c____ to the birds and beast who eat insects.A a great deal b a lot of c a great many d much of7 how many spiders are involved _____a_ this work on our behalf?A at b for c in d to8 there are many different ___a___ spidersA sort of b kind of c type of d kindsLesson 35 earlier climbers liked summits ____c__ had never been climbed before.A which b which they c that they d unless they6 _____d_ single aim was getting to the topA they're b there c their d theirs7 ___a___ Zermatt and Chamonix,most places were unknown.A except b unless c without d apart from8 ____b__ were generally dirty and flea-ridden.A the few inns that existed b inns like thisC such inns d few innsLesson 45 several cases have been reported in Russia recently of people ____b__ can readA whom b that c which d they6 one day she came into his office and put her hands on the door of the safe ____c__A as it happened b by chance c perhaps d intentionally7 _d_____ these tests were being conducted ,she was able to read a newspaper.A during b on occasion c while d as if8 Vera couldn't see with her skin ____a__ she was blindfold .A only b except c as if d unlessLesson 55 the problem,if there is one, __d____ by older peopleA created b is created c creates d is creating6 for one thing ,if you ___a___ a problem,you have a certain identity.A were b being c had d are7 ____c__ to be linked with life ,and the origin of things.A they seem b it seems c this seems d what seems8 it is ___b___ they are conceited and ill-manneredA necessary b permissible c possible d likelyLesson 65 if only ____a_ possible for the common people to meet each other.A it would be b it could be c it were d it might be6 you play __a__ winA in order to b in order that c so that d for7 the village green is the _a__ you pick sides.A the place b the time c the reason d the cause8 ____d__ the question of national prestige arisesA the moment b just c as long as d provedingLesson 75 not __b____ sound made by animals serves as languageA every b each c the whole d the entire6 we have only to turn to that extraordinary discovery of echo-location in bats to seea case ____a__ the voice plays a strictly utilitarian roleA which b where c when d though7 __c____ he shout in the vicinity of a wall, an echo will come back.A should b if c when d though8 ___d___ the echo-sounding apparatus was born.A such b the way c that's how d like thisLesson 85 american farmers can't export chickens to europe ___b___ differences in national regulations.A through b according to c in respect of d because of6 an electric razor from the eu __a____ sold in the us unless it meets us standards.A oughtn't to be b can't be c shouldn't be d doesn't have to be7 america and the eu ____a__ to reach a dealA are still trying b slways try c tried d were trying8 the details are __b____ that they may be hard-pressed to get a deal.A so complex b enough complex c such complexity d too complex。