高二卓越生暑假作业(八)

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高中高二语文暑假作业精选

2019中学高二语文暑假作业精选2019中学高二语文暑假作业精选一、课内双基1.下列词语中加点字的读音正确的一项是( )A.袅袅(niǎo) 得鱼忘筌(shuān)疏朗(shū) 翩翩起舞(piān)B.皎皎(jiǎo) 窸窸窣窣(suō)褐绿(h) 缠绵悱恻(min)C.灼灼(shu) 四处漂泊(b)触及(ch) 空气潮湿(rn)D.寒砧(zhēn) 冉冉升起(rǎn)凄清(qī) 笑声爽朗(shuǎn)【答案】 D(A.筌读quB.窣读sū;C.灼读zhu。

)2.这篇文章事实上是谈论诗歌语言的示意性问题，为什么把说木叶作为标题?下列说法不正确的一项是( )A.把标题定为说木叶，就可以把古诗中的意象木叶作为论题，围绕它绽开全文。

B.作者先解除古代诗人考虑文字洗练的因素，再探寻它用于秋天的情景中蕴含有落叶的因素，最终从中得出诗歌语言的示意性问题，并加以阐发。

C.从现象谈到本质，从个别谈到一般，从详细谈到抽象，既深化浅出地阐发了理论，又易于为广阔读者所接受。

D.假如把题目定为谈谈诗歌语言的示意性问题，也无不行。

因为作者考虑到读者是中学生，力求写得浅显易懂，深化浅出，所以采纳这个标题。

【答案】 D(作者写本文时并未想到它被收入课本，也不是专为中学生写的。

)3.下列对句子的理解，不精确的一项是( )A.袅袅兮秋风，洞庭波兮木叶下。

(《九歌》)自从屈原吟唱出这动人的诗句，它的显明的形象，影响了此后历代的诗人们，很多为人传诵的诗篇正是从这里得到了启发。

文章开头紧扣题目，说明木叶的来历，以及对后代诗歌产生的影响。

B.如谢庄《月赋》说：洞庭始波，木叶微脱。

陆厥的《临江王节士歌》又说：木叶下，江波连，秋月照浦云歇山。

引用这些诗句，都是为了说明古代诗人特殊宠爱运用木叶一词，因此木叶在古诗中很常见。

C.木叶是什么呢?根据字面的说明，木就是树，木叶就是树叶，这好像是不须要多加说明的。

设问开头，引出对木叶与树叶在诗歌运用上的分析。

2022高二英语暑假作业答案大全

2022高二英语暑假作业答案大全2022高二英语暑假作业答案大全1Harry is eighteen now. He studies in a middle school. His parents like himvery much and hope he can become a famous man. So they often tell him to studyhard and they do all for him. They call him at si某in the morning, afterbreakfast his father takes him to school in a car and in the afternoon, as soonas the young man comes back, the supper is ready. Of course, he never washes hisclothes or goes to buy something in the shops.Once Harry's father was sent to London on business. He would stay there forhalf a year. Leaving, he told his wife to take good care of their son. The womanhad to get up earlier and did all what her husband did before. And two monthslater she was so tired that she was ill in bed. Now the young man got intotrouble. He couldn't do any housework. He had to do as his mother told him. Evenhe didn't know where to get on the bus!Yesterday Harry's mother found his shoes were worn out and told him to buya new pair in the shop. But he didn't know how to choose. The woman had a sighand gave him a shoe pattern(鞋样) and told him to buy a pair of shoes himself.It's Saturday today and Harry doesn't go to school. With a policeman's help, hefound a shop. The shopkeeper was friendly to him. The man brought a lot of shoesand asked him to choose. When he was trying on a pair, suddenly he rememberedsomething and took them off. The man was surprised and asked, "What's thematter, young man?""I'm sorry, I've left the shoe pattern at home!"1. _______ always does some housework in the morning.A. Harry's fatherB. Harry's motherC. HarryD. Nobody2. Harry's parents do all instead of him because _______.A. he's too youngB. he has poor healthC. he's busy with his studiesD. they hope he spends all time onstudies4. In fact, _______.A. Harry wanted his mother to buy shoes for himB. Harry didn't believe himselfC. Harry wouldn't listen to his motherD. Harry was strong enough to buy shoes for himself【答案】本文讲一个只会死读书的书呆子自理能力很差，连买鞋子这么简单的事都做不了。

高二卓越生暑假作业(五)

高二卓越生暑假作业（五）单选完型单选练习(1)1．______ strong and powerful China will certainly benefit ______ whole world．A．A; a B．The; a C．The; the D．A; the2．----What ______ do you focus on when choosing a mobile phone for personal use?----Its functions and stand-by time．A．features B．signs C．symbols D．brands3．Johnson was much depressed as he didn’t sell half as many computers as he thought he____．A．will B．did C．was D．would4．______ it is true that a student’s most important goal is to do well in his or her studies, it doesn’t need to be the only goal．A．When B．As C．While D．Before5．It is required that all traffic participants should ______ the traffic rules to make traffic safer and faster．A．perform B．possess C．observe D．support6．Obama says he is angry about policies that always favor the wealthy and powerful over ______ Americans and insists that opportunities be opened up to all．A．average B．intelligent C．competitive D．original7．______, a small advertisem ent held my attention, which read “Easy job．Good wages．No experience necessary．”A．Looking through the newspaperB．While I was looking through the newspaperC．To look through the newspaperD．I was looking through the newspaper8．After the earthquake, the Haitian（海地的）people needed to be helped ______．A．occasionally B．anxiously C．practically D．urgently9．This is a difficult and stressful job, but one ______ you can really help people．A．that B．where C．which D．of which10．Tom was so wild about computer games that he would stay online for ten hours ______every day．A．in the end B．in particular C．on end D．on purpose11．______has recently been done to provide more buses for the people, a shortage of public vehicles remains a serious problem．A．Despite that B．Despite of whatC．In spite of what D．Though what12．The most important words in this sentence have been ______, so it doesn’t make any sense．A．left out B．held out C．set out D．made out13．----How do you find the concert in the Beijing Grand Theatre last night?----_______．But the conductor was perfect．A．I couldn’t agree more B．I don’t think much of itC．I was crazy about it D．I really like it14．It is in this very village _______ she will build her first school, _______ inspires everyone to help her．A．where; that B．that; which C．that; that D．which; that15．Mary failed the driving test again．If she ______ harder, she ______ the test easily．A．practiced; would pass B．had practiced; would passC．had practiced; would have passed D．should practice; should have passed 16．Steven’s exam results put him the top ten students in his grade.A．among B．between C．in D．at17．Ballet is amazing; you go ,you are likely to find yourself going again and again.A．as B．once C．unless D．while18．Both of the sofas they ordered online arrived, but fit through the doorway.A．none B．nor C．neither D．either19．If transport costs into consideration at the beginning , the factory would have been built far from its present place.A．will be taken B．were taken C．had been taken D．were being taken 20．—What do you think about dress in the shop window?—Oh, it’s beautiful. You may give it to Linda as birthday present.A．a; a B．the ;a C．a ;the D．the ;the21. My friend’s birthday is coming soon. I would like to go to store, or some place close by to buy him present.A. the; theB. a ; theC./;aD. the; a22. You may depend on that they will look after your daughter when you are away for the meeting.A. itB. thisC. herD. them23. Five of the twelve bronze animal heads to China till now, with seven other ones still missing.A. returnB. had returnedC. have been returnedD. returned24. Don’t look down upon the little creature. In a few weeks, it will a butterfly.A. turn upB. turn intoC. turn offD. turn in25. Jane came to know that beneath the calm surface is a man of fierce temper，so she decided to break up with her boyfriend.A. abruptlyB. apparentlyC. increasinglyD. absolutely26.When she was in trouble, I did what I could to help her. my help, she wrote me a letterof thanks.A. In honor ofB. In case ofC. In terms ofD. In return for27.Nancy enjoyed herself very much last week she visited her friends is Sydney.A. whichB. thatC. whereD. when28.John was dismissed last week because of his attitude towards his job.A. casualB. informedC. determinedD. admirable29.Once new difficulties in your work, it’s always important to use your brains.A. raiseB. ariseC. arouseD. rise30.About 187 passengers were reported the shipwreck which happened last month.A. to have been survivedB. having survivedC. to have survivedD. to survive31.Don’t interrupt me, Kevin. You force me to tell you the truth right now?A. MightB. ShouldC. MustD. Would32. the audience were particular about was that Dong Qing made a small mistake when conducting the party for the Spring Festival 2009.A. ThatB. WhichC. WhatD. When33. One thousand dollars a month is not a fortune but would help cover my lining .A. billsB. expensesC. pricesD. charges34. Cheer up! Everyone may have periods in their lives everything seems tough.A. whenB. whereC. whichD. that35.—Tim, you are leaving for Jiuzhaigou tomorrow. Why not pack your clothes and food up now?—。

高二英语暑假作业(人教版选修8,共40页带答案)

Book 8Unit 1 A land of diversityⅠ词汇运用（请根据语义及提示写出单词）1. The of the students wish to in computer at university. (majority)2. He was excited because he was chairman in the . (elect)3. As the wages were low, there were few for the job. He was one of the persons who filled out an form to for the job because he needed a job badly. (apply)4. It became that she was going to die. , her son was very sad. (apparent)5. What p of babies die of this disease every year？(percent)6. Research i that eating habits are changing fast.7. Why did you buy such a shabby car at such a high price? If I were you, I would have ha car.8. The r (改革) and open policy has brought us Chinese people a rich and prosperous life.9. After i the disc into the player, a menu will appear that allows you to choose any music you like on it.10. He has a good g of the English grammar.Ⅱ短语回忆（请根据提示写出短语）1. live 继续存在；继续生存2. by means …用……办法；借助……3. keep 坚持；维持；沿袭(风俗、传统等)4. team up 与……合作或一起工作5. take 包括；吸收6. apply 申请；请示得到7. a great / good 许多；很多8. mark 画线；标出界限9. make a 习惯新的生活方式、工作等10. back back 背靠背Ⅲ佳句联想（请根据提示翻译句子）16. 警察把她说的每一句话都记了下来。

高二卓越生暑假作业(二)

高二卓越生暑假作业<二）阅读表达专练AEvery year, whenever Spring Festival arrives, a lot of Chinese people cannot wait to go home. They queue for long hours in front of the ticket offices in railway stations, or do whatever they can in order to get a ticket. They tolerate the long journey on the train only to want to ____________ with their near and dear ones.b5E2RGbCAPAccording to The Beijing Youth Daily, most Chinese celebrate the Spring Festival not only because they want to follow tradition, there are also some practical reasons to explain Chinese people's fever for the holiday. Compared with one's workplace, home provides a more humane environment for one to relax oneself.p1EanqFDPwSociety may do with or without you, but at home, you become unique and indispensable. You may be the father or mother, daughter or son, grandfather or grandmother in the family and the family will be incomplete if anyone is absent, because every member in the family is bound together, and everyone in the family is pleased with the feeling that he or she is unique and irreplaceable.DXDiTa9E3dIn addition, family provides an ideal environment for one to fully relax oneself. At home, one can take one's time do whatever he or she wants, and one can spend money whenever one likes. In society, however, one needs to do everything fast and with high efficiency, because society always requires efficiency and maximum profits. Such company principles make people merely a tool in modern society.RTCrpUDGiTChinese people's strong desire for Spring Festival shows that they feel oppressed and have a sense of predicament(困境> of existence in modern society. The Spring Festival provides a chance for them to escape from such anxiety and treasure the long-lost tradition of community spirit. With the Spring Festival, people can find back the warm, family atmosphere often seen in days gone by.5PCzVD7HxA1. What's the passage mainly talking about? (Please answer within 10 words.>jLBHrnAILg________________________________________________________xHAQX74J0 X2. Fill in the blanks with proper words or phrases to complete the sentence. (Please answer within 10 words. >LDAYtRyKfE_________________________________________________________Zzz6ZB2L tk3. Which sentence in the passage can be replaced by the following one?dvzfvkwMI1You may not be a necessary part in society, but in your family, you are very important and no one else can take the place of you.rqyn14ZNXI_________________________________________________________EmxvxOtO co4. Do you think home is important for Chinese to celebrate the Spring Festival? Why or why not? (Please answer within 30 words.>SixE2yXPq5_________________________________________________________6ewMyirQ FL5. Translate the underlined sentence in the last paragraph into Chinese.kavU42VRUsBIn the modern society there is a great deal of argument about competition. Some value it highly ,believing that it is responsible for social progress and prosperity(繁荣>. Others say that competition is bad ,that it sets one person against another, that it leads to unfriendly relationship between people.y6v3ALoS89I have taught many children who held the belief that their self-worth relied on how well they performed at tennis and other skills. For them, playing well and winning are often life-and death affairs. In their single-minded pursuit of success, the development of many other human qualities is sadly forgotten.M2ub6vSTnPHowever, while some seem to be lost in the desire to succeed, others take an opposite attitude. In a culture which values onlythe winner and pays no attention to the ordinary players, they strongly blame competition. Among those who complain most are youngsters who have suffered under competitive pressures from their parents or society. Teaching these young people, I often observe in them a desire to fail. They seem to seek failure by not trying to win or achieve success. By not trying, they always have an excuse: "I may have lost, but it doesn't matter be cause I really didn't try. "What is not usually admitted by them is the belief that if they had really tried and lost, ________________ . Such a loss would be the measure of their worth.0YujCfmUCw Clearly, this belief is the same as that of true competitors who try to prove themselves. Both are based on the mistaken belief that one's self-respect relies on how well one performs in comparison with others. Both are afraid of not being valued. Only as this basic and often troublesome fear begins to dissolve(缓解> can we discover a new meaning in competition.eUts8ZQVRd1. What does this passage mainly talk about? (Please answer within 15 words. >sQsAEJkW5T____________________________________________________GMsIasNXkA2. Which sentence in the passage can be replaced by the following one?TIrRGchYzgAlthough it seems that some are dying to succeed, others think differently.7EqZcWLZNX_______________________________________________3. Please fill in the blank in the 3rd paragraph with proper words or phrases to complete the sentence. (Please answer within 10 words.>lzq7IGf02E_______________________________________________________zvpgeqJ 1hk4. What's your attitude toward competition? (Please answer within 30 words. >NrpoJac3v1___________________________________________________1nowfTG4KI5. Translate the underlined sentence in the 3rd paragraph into Chinese.fjnFLDa5Zo_______________________________________________________tfnNhnE 6e5CAmerica is a country on the move．In unheard-of numbers, people of all ages are exercising their way to better health．According to the latest figures，59 percent of American adults exercise regularly—up 12 percent from just two years ago and more than double the figure of 25 years ago．Even non-exercisers believe they would be more attractive and confident if they were more active．HbmVN777sLIt is hard not to get the message．The virtues of physical fitness are shown on magazine covers，postage stamps，and television ads for everything from beauty soaps to travel books．Exercise as a part of daily life did not catch on until the late 1960s when research by military doctors began to show the health benefits of doing regular physical exercises．Growing publicity for races held in American cities helped fuel a strong interest in the ancient sport of runningAlthough Americans have also discovered other forms of exercise<such as walking and swimming），running________________________________________．V7l4jRB8HsAs the popularity of exercise continues to increase．so does scientific evidence of its health benefits．The key to fitness is exercising the major muscle group vigorously enough to approximately double the heart rate and keep it doubled for 20 to 30 minutes at a time．Doing such physical exercises three times or more a week will produce considerable improvements in physical health in about three months．83lcPA59W976．What is the best title for the passage?<Please answer within 10 words．）mZkklkzaaP____________________________________________ __ _____AVktR43bpw77．Which sentence in the passage can be replaced by the following one?ORjBnOwcEdThere are a lot of people of all ages who seek for better health through exercise．2MiJTy0dTT_______________________________________________78．Please fill in the blank in the second paragraph with proper words or phrases to complete the sentence．<Please answer within 10 words．）gIiSpiue7A___________________________________________________uEh0U1Yfmh79．What is the author’s purpose in writing the last paragraph?<Please answer within 30 words．）IAg9qLsgBX_________________________________ ___________ _______WwghWvVhPE80．Translate the underlined sentence in the last paragraph into Chinese．asfpsfpi4k_________________________________________________ __ ___ooeyYZTjj1高考作文万能模版(一>段首句1. 关于……人们有不同的观点。

2021年高二暑假作业(八)英语

2021年高二暑假作业（八）英语一、选择题1. Later in this chapter cases will be introduced to readers ______ consumer plaints have resulted in changes in the law.A. whereB. whenC. whoD. which2.We’d like very much to join in the activities, _______ we could municate and exchange lots of information.A. thatB. whichC. whatD. where3. Bungee jumping is an adventurous sport, popular with young adults, ______courage matters more than strength.A. whoseB. thatC. of whichD. where4．I shall never forget the days _____ the Olympic Game was held in Beijing, _____ has a great effect on my life.A. when ; whichB. that ;whichC. when; thatD. which; that5．When deeply absorbed in work, ______ he often was，he would forget all about eating or sleeping.（xx北京卷）A. thatB. whichC. whereD. when6. –What do you think of teaching, Bob?–I find it fun and challenging. It is a job ___ you are doing something serious but interesting. A. where B. Which C. When D. that7. It’s helpful to put children in a situation they can see themselves differently. A. that B. when C. which D. where8. In our class there are 46 students, _____ half wear glasses.(xx 四川卷)A. in whomB. in themC. of whomD. of them9. Gun control is a subject Americans have argued for a long time.A. of whichB. with whichC. about whichD. into which10. Mozart’s birthplace and the house ______ he posed ‘The Magic Flute’ are both museums now.A. whereB. whenC. thereD. which二、完形填空A man hired a taxi outside the airfield．The cab had a woolen carpet with 1 lace edges．On the glass partition that 2 the driver's seat was a copy of a famous painting．Its windows were all clean．The customer was very much 3 and said to the driver，“I've never seen a nicer 4 ．”“Thank you for your praise．”the driver answered 5 ．“The car isn't mine，”said the driver．“It belongs to the pany．I used to be a 6 of cabs．When they returned，all of them were as 7 as garbage cans with cigarette butts and rubbish 8 here and there．On the seats and door-handles could be found something 9 like peanut sauce or, chewing gum．Why so? I thought if the car itself were very clean the passengers would most 10 be considerate and refrain from littering．”“So when I got a 11 to be a taxi-driver，I began 12 my idea into practice-to tidy and 13 the car．Now before a new passenger gets on my car，I'd make a check and be sure it is in good order.When my car 14 after a day's work，it always remains 15 ．”When doing a thing，one makes efforts and wants to see the result．To change others，one has to make twice the 16 but get half the result．To change oneself is the other way round-more fruit with less effort．One had better ask oneself why one makes 17 on others much more than on oneself． 18 you take enough care to do as best you can for other people's sake，your efforts will yield results，If you 19 the inner world of your own，examine yourself and wipe out the dust and dirt，instead of fixing your eyes on other people，you will find a cheerful 20 for yourself and create a pleasant environment for others．1．A．ugly B．exciting C．brilliantD．favorite2．A．separated B．covered C．protectedD．prevented3．A．moved B．annoyed C．disappointed D．surprised4．A．seat B．carpet C．garage D．cab 5．A．naturally B．smilingly C．hopefully D．firmly 6．A．driver B．cleaner C．repairer D．customer 7．A．attractive B．pleasant C．dirty D．clean 8．A．spread B．extended C．dotted D．1eft 9．A．funny B．busy C．sticky D．clumsy 10．A．likely B．willingly C．extremely D．regularly 11．A．permit B．1icense C．certificateD．passport12．A．put B．take C．make D．get 13．A．provide B．drive C．decorate D．describe 14．A．speeds B．leaves C．arrives D．returns 15．A．spotless B．pretty C．bright D．dirty 16．A．progress B．effort C．attempt D．trial 17．A．suggestions B．ments C．demandsD．decisions18．A．Though B．While C．As D．If19．A．look into B．look for C．look up D．lookthrough20．A．spirit B．mood C．mind D．sense三、阅读理解ABeing a teacher is one of the best ways to make a difference in the life of a child and even older students. Here are some great scholarships and grant opportunities to get the ball rolling on your dreams of being a teacher.Straightforward Teacher ProgramThis is one of the most popular and unique scholarships available for students working towards being teachers. The foundation offers their scholarships every three months as opposed to each year. During each payment, four students receive a $500 scholarship.Prezell Robinson Scholarship ProgramWhile this scholarship is available only to students in the state of North Carolina, it is so incredibly helpful that many students choose to study in the state for the only purpose of receiving it. It is offered to college students who e from low-ine high schools or families that are interested in pursuing a long term career in education at any level.New York State Scholarship ProgramOfficials in the state of New York founded this program to award students who want to give back to their munity through their ability to teach. The catch for this scholarship is that the students must be pursuing a teaching career in mathematics or science at the secondary level.Also, because the program was designed to improve the education system in New York, the candidates must sign a service contract agreeing to work full time within the state for at least five years after graduation.Coca-Cola ScholarshipsYou may have many opportunities for grants and scholarships through The Coca Cola Foundation. There is the Coca Cola Teaching Foundation that will provide free money for students pursuing an education in the teaching field. This is the most obvious for teachers, but do not be afraid to check out their other offers.Funds For TeachersNot all scholarships or grants are for students entering or already in college. The Funds for Teachers scholarships are for graduates whoare already working in the field, but want to improve their possibilities, skills and education in an effort to increase their ability to teach the students that cross their path more effectively. Teachers in PreK through 12th grade are applicable no matter where they teach or what subject they specialize in.1. How many students get their scholarships each year according to the Straightforward Teacher Program ?A. FourB. SixteenC. EightD. Six2. The reason why many students choose to study in the state of North Carolina is that ________.A. They can pursue a long term career in educationB. There are some good universities in North CarolinaC. They can receive Prezell Robinson ScholarshipD. They can go to college easily.3. Which scholarship goes to the student who must be a science or math teacher after graduation?A. Coca-Cola ScholarshipsB. New York State ScholarshipC. Prezell Robinson ScholarshipD. Straightforward Scholarship4. Who will get the Funds For Teachers scholarship?A. All the studentsB. The students who are working as a teacherC. All the science teachersD. The college graduates teaching in PreK5. What is the best title of the passage?A. Dreams of Being a TeacherB. Teaching Scholarships and GrantsC. Five Scholarships for TeachersD. Five Scholarships for StudentsBWe are all interested in equality, but while some people try to protect the school and examination system in the name of equality, others, still in the name of equality, want only to destroy it.Any society which is interested in equality of opportunity and standards of achievement must regularly test its pupils. The standardsmay be changed – no examination is perfect – but to have no tests or examinations would mean the end of equality and of standards. There are groups of people who oppose this view and who do not believe either in examinations or in any controls in school or on teachers. This would mean everything would depend on luck since every pupil would depend on efficiency, the values and the purpose of each teacher.Without examinations, employers will look for employees from the highly respected schools and from families known to them – a form of favoritism will replace equality. At the moment, the bright child from an ill-respected school can show certificates to prove he is suitable for a job, while the lack of a certificate indicates the unsuitability of a dull child attending a well-respected school. This defense of excellence and opportunity would disappear if examinations were taken away, and the bright child from a poor family would be a prisoner of his school’s reputation, unable to pete for employment with the child from the favored school.The opponents of the examination system suggest that examinations are an evil force because they show differences between pupils. Accordingto these people, there must be no special, different academic class. They have even suggested that there should be no form of difference in sport or any other area: all jobs or posts should be filled by unsystematic selection. The selection would be made by people who themselves are probably selected by some puter.6. The word “ favoritism” in paragraph 3 is used to describe the phenomenon that________.A. bright children also need certificates to get satisfying jobs.B. children from well-respected schools tend to have good jobs.C. poor children with certificates are favored in job markets.D. children attending ordinary schools achieve great success.7. What would happen if examinations were taken away according to the author?A. Schools for bright children would lose their reputation.B. There would be more opportunities and excellence.C. Children from poor families would be able to change their schools.D. Children’s job opportunity would be affected by their school reputation.8. The opponents of the examination system will agree that____________.A. jobs should not be assigned by systematic selectionB. puters should be selected to take over many jobsC. special classes are necessary to keep the school standardsD. schools with academic subjects should be done away with9. The passage mainly focuses on ____________.A. schools and certificatesB. examinations and equalityC. opportunity and employmentD. standards and reputation10. The underlined word “reputation” means ____________.A. successful achievementB. good titleC. strict managementD. fame四.阅读表达[1] The kids get home from school—tired, hungry and looking for entertainment. The last thing they want to do is to get on with their homework. However, at this very time, parents often remind the kids to do their homework by nagging（唠叨）and cajoling（哄骗）. If that doesn’twork, homework wars break out. But with some basic rules and good habits, they can be avoided.[2] When it es to preparing your kids for homework success, one of the first things to begin is the environment they are working in. Not all children will like working alone in their bedrooms. Some children might prefer to study at the kitchen table, and providing that location works for the family, there’s no reason to force them into another room.[3] Try to keep the house relatively quiet and free of distractions. If you’re worried you can’t provide the right equipment or environment at home, see whether the local library could offer an alternative place to study. Also, some schools will offer homework clubs, where students can plete homework and seek help from a supervising teacher（指导老师）if needed.[4] Once you’ve got the study environment sorted, think about when is _____ for homework to be done. If children are old enough to make plans, it can be worth sitting down together and breaking projects into smaller tasks to be pleted on different nights. This can stop kids form feeling overwhelmed（被压垮）and it also teaches them time management skills.[5] If you follow the above rules, you can avoid homework wars down the track. And if tensions are rising at home around homework, remember that a little bit of kindness can go a long way.1.What’s the main idea of the text? (no more than 12 words)_________________________________________________________________ ________2.List two other ideal places for children to study in apart froma quiet room at home. (no more than 8 words)①__________________________________ ②_____________________________3. Fill in the blank in Paragraph 4 with proper words. (no more than 5 words)_________________________________________________________________ __________4.How do you avoid homework wars in your family except the rules listed in the passage? (no more than 30 words)_________________________________________________________________ __________5.Translate the underlined sentence in Paragraph 2 into Chinese._________________________________________________________________ __________五、话题写作作为中学生，你肯定经历过多次考试，体验过成功，也遭遇过失败。

2018高二数学暑假作业及答案

【导语】着眼于眼前，不要沉迷于玩乐，不要沉迷于学习进步没有别*的痛苦中，进步是⼀个由量变到质变的过程，只有⾜够的量变才会有质变，沉迷于痛苦不会改变什么。

⽆忧考⾼⼆频道为你整理了《2018⾼⼆数学暑假作业》，希望对你有所帮助！【⼀】（⼀）选择题（每个题5分，共10⼩题，共50分） 1、抛物线上⼀点的纵坐标为4，则点与抛物线焦点的距离为() A2B3C4D5 2、对于抛物线y2=2x上任意⼀点Q,点P(a,0)都满⾜|PQ|≥|a|,则a的取值范围是() A（0,1）B(0,1)CD(-∞,0) 3、抛物线y2=4ax的焦点坐标是（） A（0,a）B(0,-a)C(a,0)D(-a,0) 4、设A(x1,y1),B(x2,y2)是抛物线y2=2px(p>0)上的两点,并且满⾜OA⊥OB.则y1y2等于 () A–4p2B4p2C–2p2D2p2 5、已知点P在抛物线y2=4x上，那么点P到点Q（2，－1）的距离与点P到抛物线焦点距离之和取得最⼩值时，点P的坐标为（）A.（，－1）B.（，1）C.（1，2）D.（1，－2） 6、已知抛物线的焦点为，准线与轴的交点为，点在上且，则的⾯积为() （Ａ）（Ｂ）（Ｃ）（Ｄ） 7、直线ｙ＝ｘ－3与抛物线交于A、B两点，过A、B两点向抛物线的准线作垂线，垂⾜分别为P、Q，则梯形APQB的⾯积为（）（A）48.（B）56（C）64（D）72. 8、(2011年⾼考⼴东卷⽂科8)设圆C与圆外切，与直线相切．则C的圆⼼轨迹为（） A．抛物线B．双曲线C．椭圆D．圆 9、已知双曲线：的离⼼率为2.若抛物线的焦点到双曲线的渐近线的距离为2，则抛物线的⽅程为 (A)(B)(C)(D) 10、（2011年⾼考⼭东卷⽂科9)设M(，)为抛物线C：上⼀点，F为抛物线C的焦点，以F为圆⼼、为半径的圆和抛物线C 的准线相交，则的取值范围是 (A)(0，2)(B)[0，2](C)(2，+∞)(D)[2，+∞) （⼆）填空题：（每个题5分，共4⼩题，共20分） 11、已知点P是抛物线y2=4x上的动点，那么点P到点A（－1,1）的距离与点P到直线x=－1距离之和最⼩值是。

生物高二年级暑假作业

生物高二年级暑假作业同窗们，骏马是跑出来的，强兵是打出来的。

希望大家在游玩的同时不要忘了学习。

查字典生物网为大家提供了高二年级暑假作业，希望对大家有所协助。

一、选择题1、小麦粒色受不连锁的三对基因A/a、B/b、C/c控制。

A、B和C决议白色，每个基因对粒色添加效应相反且具叠加性，a、b和c决议白色。

将粒色最浅和最深的植株杂交失掉F1。

F1的自交后代中，与基因型为Aabbcc的集体表现型相反的概率是 ()A.164B.664C.1564D.20642、某遗传病的遗传触及非同源染色体上的两对等位基因。

Ⅰ1基因型为AaBB，且Ⅱ2与Ⅱ3婚配的子代不会患病。

依据以下系谱图，正确的推断是 ()A.Ⅰ3的基因型一定为AABbB.Ⅱ2的基因型一定为aaBBC.Ⅲ1的基因型能够为AaBb或AABbD.Ⅲ2与基因型为AaBb的女性婚配，子代患病的概率为3163、子代不同于亲代的性状，主要来自基因重组，以下图解中哪些进程可以发作基因重组 ()A.①②④⑤B.①②③④⑤⑥C.③⑥D.④⑤4、基因型区分为aaBbCCDd和AABbCCDd的两种豌豆杂交，其子代中纯合子所占的比例为 ()A.14B.18C.116D.05、玉米是一种雌雄同株的植物，正常植株的基因型为A_B_，其顶部开雄花，下部开雌花;基因型为aaB _的植株不能长出雌花而成为雄株;基因型为A_bb和aabb植株的顶端长出的是雌花而成为雌株(两对基因位于两对同源染色体上)。

育种任务者选用上述资料作亲本，杂交后失掉下表中的结果。

那么所用亲本的基因型组合是 ()类型正常株雄株雌株数目 998 1 001 1 999A.aaBb×Aabb或AaBb×aabbB.AaBb×Aabb或AaBb×aabbC.aaBb×AaBb或AaBb×AabbD.aaBb×aabb或Aabb×aabb6、某一植物种群中仅有Aabb和AAbb两种类型的集体(aa的集体在胚胎期死亡)，两对性状的遗传遵照自在组合定律，Aabb∶AAbb=1∶1，且该种群中雌雄集体比例为1∶1，集体间可以自在交配，那么该种群自在交配发生的成活子代中能动摇遗传的集体所占比例是 ()A.58B.35C.14D.347、现有①～④四个果蝇品系(都是纯种)，其中品系①的性状均为显性，品系②～④均只要一种性状是隐性，其他性状均为显性。

人教版高中英语选修八高二下学期英语暑假作业8

山西重点中学协作体高二下学期英语暑假作业8一、对话训练Mary: Hello． This is Mary． _1.Mike: Oh, Mary． This is Amy． _2.I' ve got hold of you at last．Mary: Nice to hear from you again after all these years'． What have you been doing?Mike: Well, I've tried many things since school． I'm now working for a food processing company in charge of sales． So I travel a lot．Mary : 3.You must really enjoy it．Mike: Oh, I do． Yeah, it's interesting, but it's quite tiring． 4.Mary : I work in a law firm, practicing in business law．Mike: 5.Mary: Yeah, but I like my job．二、改错6、短文改错Even today, a man with good manner will politely open the door for a lady, help her put on her coat when necessary and see her safely to the door of her home before a date. When a man takes a woman out for a dinner, it is considered impolite to help her with her chair when she gets up or sits down. On a crowding train or bus, it is proper for a man offer a woman his seat, particular if she is old or carries a baby. Even when it comes to shake hands, ladies come first. It is impolite for a man to extend his hand for a handshake upon first greeting. Unless a woman does not extend her hand to the man first, the man shouldn’t offer theirs.三、阅读理解7、任务型阅读Can a lie-in make you healthier?Every morning, my alarm goes off, I wake from my slumber and hit the snooze button. Then I crawl back under the duvet to grab a few more minutes of shut-eye. “Tonight I’ll go to bed early,” I tell myself. But, evening comes and I get a second wind, completely forgetting about my early night.Why am I finding it so difficult to get a good night’s sleep? And is it a problem?The amount we sleep has declined over the years and insomnia is on the rise. Modern technology is often blamed. The light from our smartphone affects levels of melatonin –thesleep-inducing hormone - keeping us wide awake into the early hours.Lack of sleep can badly affect our health and memory. We need deep sleep to move our memories from short-term storage into long-term storage. If we don’t get enoug h sleep, we could lose these memories. This is especially disastrous for people studying for exams.So, how can we learn to sleep better? For Professor Till Roenneberg, it's important people recognise they have an internal body clock. This determines whether you are a night owl, an early bird or somewhere in the middle. We don’t have any choice.“It’s like feet,” he said “Some people are born with big feet and some with small feet, but most people are somewhere in the middle.”Our work schedules are out of sync with our natural sleep patterns. He says this leads to “social jetlag” where people feel like they are constantly in the wrong time zone.Paul Kelley – a sleep expert from the University of Oxford – says that most people are getting up too early. He believes work and school should start a few hours later. Many companies are starting to realise more sleep can mean a more productive workforce and are changing work schedules. While in South Korea, office workers are heading to relaxation parlours at lunchtime to take power naps in hammocks or massage chairs. This is much healthier than catching forty winks while sitting on the toilet or dropping off at their desks.So, if like me you find yourself hitting your snooze button every morning – don't feel bad. It’s just our body clocks!阅读前：请联系上下文或查阅字典将文章黑体字翻译成中文。

高二化学暑假作业：有答案

高二化学暑假作业：有答案学期期末考试完结，接下来就是假期时间，查字典化学网特整理了高二化学暑假作业，希望能够对同学们有所帮助。

一、选择题(本题共7道小题1.下列各组元素性质的递变情况错误的是()A.Na、Mg、Al原子最外层电子数依次增多B.P、S、Cl元素最高正价依次升高C.N、O、F第一电离能依次增大D.Na、K、Rb电负性逐渐减小2.下列表示式错误的是()A.Na+的轨道表示式：B.Na+的结构示意图：C.Na的电子排布式：1s22s22p63s1D.Na的简化电子排布式：[Ne]3s13.短周期原子序数依次增大的主族元素R、T、Q、w、Y具有如下信息：①R、Y原子的最外层电子数与电子层数相同;@Q是地壳中含量最高的元素，R与T的核电荷数之和等于Q的核电荷数;③w与R同主旅。

下列说法正确的是( ) A.T、Q、w、Y的原子半径大小为：T乙>甲D.甲、乙和丙分子均为由极性键构成的极性分子(3)由元素J、C、E组成一种化学式为J(CE)的配位化合物，该物质常温下呈液态，熔点为一20.5℃，沸点为103~C，易溶于非极性溶剂。

据此可判断：该化合物的晶体中存在的作用力有( )A. 离子键B.极性键C.非极性键D.范德华力E.氢键F.配位键Ⅱ.(1) BCl3中B原子的杂化方式为。

第一电离能介于B、N 之间的第二周期元素有种。

写出与BCl3结构相同的一种等电子体(写离子)。

(2)科学家测得胆矾中既含有配位键，又含有氢键，其结构示意图可简单表示如下：①胆矾的化学式用配合物的形式表示为的②胆矾中SO42-的空间构型为评卷人得分三、实验题(本题共0道小题,,共0分)试卷答案1.C考点：同一周期内元素性质的递变规律与原子结构的关系;同一主族内元素性质递变规律与原子结构的关系.分析：A、根据Na、Mg、Al原子的核外电子排布分析;B、根据P、S、Cl最外层电子数目=元素的最高正价(氧、氟除外);C、同周期从左到右元素的第一电离能依次减小，第IIIA和第V A族反常;D、同主族元素从上到下元素的电负性逐渐减弱.解答：解：A、Na、Mg、Al原子的核外电子分别为11、12、13，原子最外层电子数分别为1、2、3，逐渐增多，故A正确;B、P、S、Cl最外层电子数目分别为5、6、7，最高正化合价分别为+5、+6、+7，故B正确;C、同周期从左到右元素的第一电离能依次减小，第IIIA和第V A族反常，O、N、F第一电离能依次增大，故C错误;D.同主族元素从上到下元素的电负性依次减弱，则Na、K、Rb元素的电负性逐渐减小，故D正确.2.A考点：原子核外电子排布;原子结构示意图.分析：钠原子的电子排布式为1s22s22p63s1，或写为[Ne]3s1，Na+的原子核内有11个质子，核外有10个电子，Na为金属元素，易失去电子，所以其价电子排布式为：3s1，轨道表示式用箭头“↑”或“↓”来区别自旋方向的不同电子，每个轨道最多容纳2个电子且自旋方向相反，据此分析解答.解答：解：A.轨道表示式用一个方框或圆圈表示能级中的轨道，用箭头“↑”或“↓”来区别自旋方向的不同电子，每个轨道最多容纳2个电子，2个电子处于同一轨道内，且自旋方向相反，所以Na+的轨道表示式：，故A错误;B.Na+的原子核内有11个质子，核外有10个电子，结构示意图为，故B正确;C.钠原子的电子排布式为1s22s22p63s1，或写为[Ne]3s1，故C正确;D.钠原子的简化电子排布式为[Ne]3s1，故D正确;3.B知识点:位置、结构、性质的相互关系应用答案解析:B 解析：短周期原子序数依次增大的主族元素R、T、Q、W、Y，Q是地壳中含量最高的元素，则Q是O元素; R与T的核电荷数之和等于Q的核电荷数，且R原子的最外层电子数等于其单质层数，则R是H，T是N元素; Y原子的最外层电子数等于其电子层数，且Y的原子序数大于O元素，则Y电子层数为3、其最外层电子数是3，则Y是Al 元素; W与R同主族且W原子序数大于O而小于Al，则W为Na。

高二英语暑假作业题及答案

高二英语暑假作业题第二部分阅读理解(共两节，满分40分)第一节 (共15小题;每小题2分，满分30分)AWhether you’re making a one-off trip to London or you’re a regular visitor, using an Oyster travel smartcard is the easiest way to travel around the city’s public transport network.Advantages of a Visitor Oyster CardA Visitor Oyster Card is one of the best ways to pay for single journeys on the bus, tube, DLR, tram, London Over-ground and most National Rail services in London:● Save time -- your card is ready to use as soon as you arrive in London.● It’s more than 50% cheaper than buying a paper travel card or single tickets with cash.● There is a daily price cap -- once you have reached this limit, you won’t pay any more.● Enjoy special offers and promotions at leading Lond on restaurants, shops and entertainment venues -- plus discounts on the Emirates Air Line cable car and Thames Clippers river buses.Buy a Visitor Oyster CardBuy a Visitor Oyster card before you visit London and get it delivered to your home address. A card costs ￡3 (non-refundable) plus postage. Order online and arrive with your Oyster in hand! You can also buy a Visitor Oyster card from Gatwick Express ticket offices at Gatwick Airport Station and on board Eurostar trains travelling to London.To p Up(充值)Your Visitor Oyster CardYou can choose how much credit to add to your card. If you are visiting London for two days, you can start with￡20 credit. If you run out of credit, add credit at the following locations:● Touch screen ticket machines i n tube, DLR, London Over-ground and some National Rail stations.● Around 4,000 Oyster Ticket Stops found in newsagents and small shops across London.● TFL Visitor and Travel Information Centers.● Tube and London Over-ground station ticket offices.● Emirates Air Line terminals.1. What benefit will you get from a Visitor Oyster Card when travelling in London?]A. It increases your working efficiency.B. It allows you to have meals free of charge.C. It saves you money on transportation.D. It provides a 50% discount at a London shop.2. How many ways are mentioned to buy a Visitor Oyste r Card in the passage?A. 2.B. 3.C. 4.D. 5.3. Where can you top up your Visitor Oyster card?A. At Gatwick Express ticket offices.B. At a tube stationticket office.C. On the Internet.D. On Eurostar trains.BPeople are always looking for lost cities and occasionally oneis found: Borobudur in Indonesia, for example. But perhaps some of the places people look for never existed— or did they? Here are just a few famous mythical(传说中的)cities.El Dorado.El Dorado is a story that began in 1537, when Spanish explorers found the Muisca people in the mountains of what is now Colombia. They heard the story of a man who covered himself with gold and dived into a lake. Then people began to talk of El Dorado –‘the golden man’Soon people started to think of El Dorado a s a place, too一 a city of gold and amazing riches. Nowadays, the name ’El Dorado’ is still used to mean‘a place where you can get rich quickly.’AtlantisThere was once an island in the middle of the Atlantic Ocean. It was the mythical island of Atlantis. The people of the island were very rich, thanks to the natural resources(资源)on their island. For hundreds of years, they lived simple lives. But slowly they began to change. They started to want power. So the gods decided to destroy Atlantis. Suddenly, the island and its people were swallowed(淹没)by the sea and were never seen again.ShambhalaIn Tibetan Buddhist tradition, Shambhala is a mystical (神秘的)country that is hidden somewhere behind the Himalayas. Shambhala is a word from an old language that means‘place of peace’or‘place of happiness’. It is said th at there is no war in Shambhala, and in the future , when the world is full of war, a huge army will come out of Shambhala, destroy the world’s bad rulers, and start a new Golden Age. Some people say this will hap pen in 2424.4. Nowadays,‘El Dorado’means‘______’A. Colombia.B. the golden man.C. a place of great wealth.D. the city with mountains.[来源:学*科*网]5. Atlantis was destroyed by_____A. the gods.B. its people.C. its powerful enemies.D. its neighboring country.6. What will probably happen in 2424 according to the last paragraph?A. The Himalayas will disappear.B. The world will be full of peace.C. Shambhala will save the world.D. There will be a war in Shambhala.7. What would be the best title for the text?A. Rich lands .B. Mythical citiesC. Famous tourist attractions.D. Newly-found ancient countries.CPsychologists have discovered that even the most independent-minded of us will conform tosocial pressure when we are with a group of people. In oneclassie experiment, people were showna vertical line and asked to find a line of identical lengthfrom a selection of three.You might think that this is an absurdly easy task, and when people perform it by themselvesthey do it very well. However, psychologists have discoveredthat we are very easily swayed by the opinions of other people when wedo this task in a group. In one study, a group of three peoplewas set up,where two of the people were confederates(同伙)of the experimenter.When the confederates deliberately gave wronganswers,people were often swayed to give the wrong answer also. In fact, 75% of people gave at least one wrong answer, with some people conforming to peer pressure on every occasion.But why do people conform in this way? In an easy task like this, it seems that people donot want to step out of line with the prevailing opinion of the group. On more difficult tasks, people also conform because they lose 〔onfidence in their own ability to make decisions and preferto trust the majority opinion instead.A typical example of this kind of conformity arises when we come across people in distress.Would you help a woman who has been attacked in the street?It turns out that you are much more likely to go to her assistance if you are alone.When other people are also around,a diffusion ofresponsibility occurs. People are paralysed into inaction, because everyone assumes that someone else will go to the woman' s assistance.8. In Paragraph 1, the underlined word "conform" probablymeans“ ”A. seek independenceB. disobey ordersC. seek pleasureD. follow what others do9.What is the purpose of the experiment described in Paragraph 2? ToA. explain why people would be influenced by the opinions of othersB. prove that people are easily influenced by the opinions of othersC. train the confederates of the experimenter as independent-minded[来源:学+科+网Z+X+X+K]D. describe how people would be influenced by the opinions of others10. In the last paragraph, according to the author,why wouldn’t one help the woman ?He .A. thinks he has no responsibilities to give a handB.thinks he has has nothing to do with itC. is too shy to give his helping hand D .thinks someone elsewill offer assistance1l.What method does the author mainly use to develop the text?A. Giving examples.B. Cause-effect analysis.C. Comparative analysis.D. Process analysis.DA group of kids at McIntyre Elementary School, in Pittsburgh, Pennsylvania, have created a special bench to make sure their fellow classmates aren’t left out on the playground. Called the “Bud dy Bench”, students can use the seat as a safe and supportive place to let others know they’d like to be included in playtime, but may be too shy to ask.The concept of the Buddy Bench is simple: Students who want t o partake in playground games and activities, but may feel hesitant, can take a seat, which signifies(表明) to other children on the playground that they may need something extra to encourage them to participate.The idea for the bench came about last year, when Farrell,school counselor at McIntyre Elementary, was conducting a leadership group to help students overcome shyness and gain confidence. Fourfourth-grade students came up with the idea for the Buddy Bench in this workshop, and worked with Farrell to draft a letter to present to the Parent Teacher Staff Organization to make the bench a reality. The PTSO approved the students’ proposal, and installed(安装) a bright metal bench with a cheerful sign that reads “Buddy Bench” on the school’s playground.Since it wa s installed on Nov. 16, the bench has been effective. The simple concept has resonated with(引起共鸣) the students, andalready has created a better environment within the school community.“Each day, I go to see the buddy bench working,” Farrell said. “The lessons they are learning now will benefit them their entire lives. It is simply a beautiful example of kids wanting to be kind and continue to be kind every day.”12. Who is Buddy Bench created for?A. Students who love games and activities.B. Students who want and continue to be kind.C. Students who are in Farrell’s leadership group.D. Students who are left out on the playground.13. Who thought of the idea for the Buddy Bench?A. Farrell.B. The PTSO.C. Four students.D. Some parents.14. What does the underl ined word “they” in the last paragraph refer to?A. The PTSO.B. The workshop members.C. Buddy Bench users.D. Farrell and teachers.15. Which of the following statements can show “the bench has been effective”?A. More and more creative ideas have come up.B. The workshop kids have set a good example.C. The PTSO has decided to provide more buddy benches.D. Some shy students have found friends on the playground.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。

2020高二化学暑假作业答案大全

2020高二化学暑假作业答案大全化学课本是依据教学大纲系统地阐述教材内容的教学用书，抓住课本，也就抓住了基础知识，应该对课本中的主要原理，定律以及重要的结论和规律着重去看、去记忆。

下面小编整理2020高二化学暑假作业答案大全，欢迎阅读。

2020高二化学暑假作业答案大全11.D考点：葡萄糖的性质和用途.菁优网版权所有分析：葡萄糖含有醛基，故可与新制备氢氧化铜浊液在加热条件下发生氧化还原反应，生成红色沉淀，依此进行判断.解答：解：A.食醋的主要成分是乙酸，不含有醛基，故不能与新制备氢氧化铜浊液在加热条件下发生氧化还原反应，故A错误;B.白酒的主要成分是乙醇，不含有醛基，故不能与新制备氢氧化铜浊液在加热条件下发生氧化还原反应，故B错误;C.食盐的主要成分是氯化钠，不含有醛基，故不能与新制备氢氧化铜浊液在加热条件下发生氧化还原反应，故A错误;D.葡萄糖含有醛基，故可与新制备氢氧化铜浊液在加热条件下发生氧化还原反应，生成红色沉淀，故D正确;故选D.点评：本题考查常见物质的性质，难度不大.要注意含有醛基的物质，可与新制备氢氧化铜浊液在加热条件下发生氧化还原反应，生成红色沉淀.2.A考点：有机高分子化合物的结构和性质.分析：高分子化合物相对分子质量特别大一般达1万以上、一般具有重复结构单元.解答：解：A.蛋白质相对分子质量较大，属于高分子化合物，故A正确;B.油脂相对分子质量较小，不属于高分子化合物，故B错误;C.葡萄糖是单糖，相对分子质量较小，不属于高分子化合物，故C 错误;D.蔗糖属于二糖，葡萄糖属于单糖，相对分子质量不很大，不属于高分子化合物，故D错误.故选A.点评：本题考查生命中的基础有机化学物质，难度较小，清楚高分子化合物概念及常见的高分子化合物即可解答.3.B4.D解：A.油脂在酸性条件下水解生成高级脂肪酸和丙三醇，故A正确;B.碘单质遇淀粉变蓝色，若变蓝则水解不完全，故B正确;C.蛋白质水解的最终产物均为氨基酸，故C正确;D.因淀粉和纤维素水解的产物都是葡萄糖，故D错误.故选D.5.D6.B略7.A略8.(1)H2SO4;NaOH;Cu(OH)2;(2)否;葡萄糖和新制氢氧化铜的反应应该在碱性条件下进行;(3)加入碘水，看是否变蓝，若变蓝说明部分水解，若不变蓝说明水解完全.解：(1)淀粉需要在稀硫酸作催化剂条件下发生水解反应，所以A 为H2SO4;得到的砖红色沉淀为氧化亚铜，说明试剂C为Cu(OH)2混悬液，葡萄糖和新制氢氧化铜的反应应该在碱性条件下进行，所以加入氢氧化铜悬浊液前需要用NaOH溶液中和，则B为NaOH，故答案为：H2SO4;NaOH;Cu(OH)2;(2)由于葡萄糖和新制氢氧化铜的反应应该在碱性条件下进行，所以加入氢氧化铜悬浊液前必须加入NaOH溶液中和，故答案为：否;葡萄糖和新制氢氧化铜的反应应该在碱性条件下进行;(3)淀粉遇到碘单质显示蓝色，所以向溶液中加入碘水，若变蓝说明淀粉没有完全水解，若不变蓝说明淀粉已经完全水解，故答案为：加入碘水，看是否变蓝，若变蓝说明部分水解，若不变蓝说明水解完全.9.(1)淀粉溶液葡萄糖溶液蔗糖溶液(2)①C12H12O11+H2OC6H12O6+C6H12O6蔗糖葡萄糖果糖②(C6H10O5-)n+nH2OnC6H12O6淀粉葡萄糖解析A遇碘水变蓝色，则A为淀粉;葡萄糖不能发生水解反应，且葡萄糖分子结构中含有醛基，能与银氨溶液发生银镜反应，故B为葡萄糖，C为蔗糖。

2020百所名校高二暑假作业物理选学

2020百所名校高二暑假作业物理选学目录选修3-3暑假作业一分子动理论暑假作业二气体暑假作业三固体液体和物态变化暑假作业四热力学定律选修3-4暑假作业五机械振动暑假作业六机械波暑假作业七光暑假作业八电磁波与相对论暑假作业一分子动理论一、选择题1．关于扩散现象，下列说法正确的是()A．温度越高，扩散进行得越快B．扩散现象是不同物质间的一种化学反应C．扩散现象是由物质分子无规则运动产生的D．液体中的扩散现象是由于液体的对流形成的2．清晨，草叶上的露珠是由空气中的水汽凝结成的水珠，这一物理过程中，水分子间的() A．引力消失，斥力增大B．斥力消失，引力增大C．引力、斥力都减小D．引力、斥力都增大3．两个分子相距为r1时，分子间的相互作用力表现为引力，相距为r2时，表现为斥力，则下面说法正确的是()A．相距为r1时，分子间没有斥力存在B．相距为r2时，分子间的斥力大于相距为r1时的斥力C．相距为r2时，分子间没有引力存在D．相距为r1时，分子间的引力大于相距为r2时的引力4．我国已开展空气中PM2.5浓度的监测工作．PM2.5是指空气中直径等于或小于2.5 μm 的悬浮颗粒物，其飘浮在空中做无规则运动，很难自然沉降到地面，吸入后对人体形成危害．矿物燃料燃烧的排放物是形成PM2.5的主要原因．下列关于PM2.5的说法中正确的是() A．PM2.5的尺寸与空气中氧分子的尺寸的数量级相当B．PM2.5在空气中的运动属于分子热运动C．PM2.5的运动轨迹是由大量空气分子对PM2.5无规则碰撞的不平衡和气流运动决定的D．倡导低碳生活，减少煤和石油等燃料的使用，能有效减小PM2.5在空气中的浓度5．做布朗运动实验，得到某个观测记录如图，图中记录的是()A．分子无规则运动的情况B．某个微粒做布朗运动的轨迹C．某个微粒做布朗运动的速度－时间图线D．按等时间间隔依次记录的某个运动微粒位置的连线6．下列说法中正确的是()A．物体温度降低，其分子热运动的平均动能增大B ．物体温度升高，其分子热运动的平均动能增大C ．物体温度降低，其内能一定增大D ．物体温度不变，其内能一定不变7．如图所示，用细线将一块玻璃板水平地悬挂在弹簧测力计下端，并使玻璃板贴在水面上，然后缓慢提起弹簧测力计，在玻璃板脱离水面的一瞬间，弹簧测力计读数会突然增大，主要原因是( )A ．水分子做无规则热运动B ．玻璃板受到大气压力作用C ．水与玻璃间存在万有引力作用D ．水与玻璃间存在分子引力作用8．1 g 100 ℃的水和1 g 100 ℃的水蒸气相比较，下列说法正确的是( )A ．分子的平均动能和分子的总动能都相同B ．分子的平均动能相同，分子的总动能不同C ．内能相同D ．1 g 100 ℃的水的内能小于1 g 100 ℃的水蒸气的内能9．如图所示，用F 表示两分子间的作用力，E p 表示分子间的分子势能，在两个分子之间的距离由10r 0变为r 0的过程中( )A ．F 不断增大B ．F 先增大后减小C ．E p 先增大后减小D ．F 对分子一直做正功10．某气体的摩尔质量为M mol ，摩尔体积为V mol ，密度为ρ，每个分子的质量和体积分别为m 和V 0，则阿伏加德罗常数N A 可表示为( )A ．N A ＝M mol mB ．N A ＝ρV mol mC ．N A ＝V mol V 0D ．N A ＝M mol ρV 0 二、非选择题11．用油膜法估测分子的大小．实验器材有：浓度为0.05%(体积分数)的油酸酒精溶液、最小刻度为0.1 mL 的量筒、盛有适量清水的浅盘、痱子粉、胶头滴管、玻璃板、彩笔、坐标纸(最小正方形边长为1 cm)．则(1)下面给出的实验步骤中，正确排序应为________(填序号)．为估算油酸分子的直径，请补填最后一项实验步骤DA．待油酸薄膜的形状稳定后，将玻璃板放在浅盘上，用彩笔将油酸薄膜的形状画在玻璃板上B．用滴管将浓度为0.05%的油酸酒精溶液一滴一滴地滴入量筒中，记下滴入1 mL油酸酒精溶液的滴数NC．将痱子粉均匀地撒在浅盘内水面上，用滴管吸取浓度为0.05%的油酸酒精溶液，从低处向水面中央滴入一滴D．_________________________________________________________.(2)利用以上测量数据，写出单个油酸分子直径的表达式为________．12．很多轿车为了改善夜间行驶时的照明问题，在车灯的设计上选择了氙气灯，因为氙气灯灯光的亮度是普通灯灯光亮度的3倍，但是耗电量仅是普通灯的一半，氙气灯使用寿命则是普通灯的5倍，很多车主会选择含有氙气灯的汽车，若氙气充入灯头后的容积V＝1.6 L，氙气密度ρ＝6.0 kg/m3。

2020高二地理暑假作业答案大全

2020高二地理暑假作业答案大全一提到高中地理，相信很多同学会想到经度、纬度、河流、山川、盆地、时区等等，就会觉得地理好难学，下面小编整理2020高二地理暑假作业答案大全，欢迎阅读。

2020高二地理暑假作业答案大全11-5DCDCA 6-10DDDCB 11-15BDCCB 16-20CBDDA 21-25BABAA26-30BCCDB 31-35CBBBD 36-40DBCDB 41-44BCDD45.(1)北回归线横贯中部，常年受副热带高气压带和东北信风带的控制(2分);位于亚欧大陆和非洲大陆之间，东西相邻的海域狭窄，受海洋影响很小(2分)。

(2)艾卜哈西邻红海(2分)，位于高原山地，地势高(2分);白天山坡上气温高、气压低，红海蒸发的水汽沿山坡上升并受到山谷的诱导，容易形成云雨天气，削弱了太阳辐射，气温较低(2分);夜间山坡降温快、气压升高，气流下沉，艾卜哈上空水汽减少，大气逆辐射弱，降温快，气温较低。

(2分)。

(3)沙特降水量少，大部分为无流区，水资源严重不足(2分);但该国油气资源丰富，能源充足，并大量出口油气创汇，经济实力强(2分);同时该国人口少，人均国民收入高，有雄厚财力通过海水淡化来缓解生活用水不足(2分)46.(1)西雅图为温带海洋性气候，终年温和多雨，适合森林生长(2分);地形以山地丘陵为主，适合森林生长(2分)。

(2)有利于扩大产业规模(2分);提供了高素质人才，有利于促进技术创新(2分)。

(3)西雅图港位于普吉特湾，港口面积大(2分);普吉特湾西侧陆地阻挡盛行西风，港区风浪小(2分);位于温带海洋性气候区，冬季不封冻(2分);以西雅图市为依托，为港口建设提供了人力、物力、财力(2分);通过连接美国东西部的铁路，货物可达美国中西部和东北部各州，腹地宽广(2分)。

47.(1)优越的自然条件：日照充分，昼夜温差大，利于在桃糖分和养分的积累;独立水系，水质优良;土质独特，营养丰富;冬季温度低，病虫害少。

高二卓越生暑假作业(一)

高二卓越生暑假作业<一）阅读表达和单选专练A[1]China will change the world as much as the world changes China, if the country continues its opening up.b5E2RGbCAP[2]How could it not? The rest of the world cannot remain unaffected by the culture of one-fifth of humanity. As China strengthens its economy, allows its citizens more overseas travel and participates in global efforts, the West surely will learn more about Chinese ways.p1EanqFDPw[3]And once it does, its people might choose to adotsome of them.DXDiTa9E3d[4]It might surprise Chinese that Westerners. When I announced my Beijing job to American friends, family and neighbors, they were very curious and mostly uninformed about China．RTCrpUDGiT[5] Our media carries little news about China except during unusual circumstances, which typically are times of stress between the two countries．We hear about arguments with China over climate change, Taiwan and Tibet, but that doesn' t tell average Americans anything about average Chinese．5PCzVD7HxA[6]Most American- don't know that Chinese weddings feature firecrackers。