周周练9

2023-2024学年外研版英语八年级上册周周练（Module 9含解析）Module 9——2023-2024学年外研版英语八年级上册周周练考查范围：Module 9一、单项选择1.It's best not to run away from our problems. We should always try to _____ them.A. solveB. takeC. getD. write2.Every morning he spends _______ hour doing exercise.Then he goes to _____ work.A. a;/B. a;aC. an;theD.an;/3.—What is the population of Beijing—Sorry, I don't know. But I think it is _____ than that of Jinan.A. largerB. fewerC.moreD. less4.If the company fails（未能）to make enough money,it will have to _____.A. take awayB. close downC.break upD. set off5.Grace often gets nervous before she gives a speech ______.A. in publicB. in futureC.in commonD. in need6.Nowadays, _____ people like HUAWEI phones better, and about four-fifths of them _____ adults.A. a number of; areB. a number of;isC. the number of; areD. the number of;is7.—The pictures of Mars taken by Tianwen 1 have become very popular recently（近来）.—Yeah. They receive ______ Internet hits（点击）a day.A. thousands ofB. thousandC. hundredD. hundreds8.Nowadays, ______ farmers leave their hometown to search for work in the cities.lion ofB.two millionslions ofD.two millions of9.Students in Grade Nine _____ a maths exam at this time yesterday.A. takeB. are takingC. were takingD. have taken10.—Oh! What's wrong with your finger—I hurt it while I _____ a model plane.A. madeB. was makingC. am makingD. make二、阅读理解AAre you the only child in your family Have you heard of"the second-child policy（政策）"Everyone knows the one-child policy. It is a population control method （控制方法）.The Chinese government aimed（打算）to control the increasing population at that time. Many Chinese couples understood that and followed this policy for nearly 40 years. Everyone should be responsible for our country.However, as time goes by, some problems appear in our society. At present, these problems are mainly about:●The number of workers changed from about 960 million in 2023 to 940 million in 2023. The number changed to 930 million in 2023 and fell by29 million by 2023.●China is now getting into an aging society. There will be more old people in the following years. But the society will be short of doctors and nurses to take care of them.●The population of China will become smaller and smaller if the one-child policy continues（持续）.It's the basic reason that leads to the two problems above.That's why the Chinese government began the second-child policy on January 1st, 2023. It allows each family to have a second child. The government expects it can help solve those social problems gradually（逐渐地）.This policy will help offer enough workers in the future and prevent our country from entering the aging society. It is reported that there will be around 2.5 million newly-born babies each year.11.From the passage, we know that ______.A. our government is facing 3 main problemsB. the one-child policy started on January 1st, 2023C. our population increased a lot from 2023 to 2023D. the second-child policy won't work at all12.The underlined word "that" in Paragraph 2 means ______.A. the familyB. the increasing populationC. the one-child policyD. the second-child policy13.The number of workers was ______ in 2023.A. 960 millionB. 940 millionC. 930 millionD. 29 million14.You may read this passage in the ______ part in a magazine.A. Travelling and TransportationB. Society and HistoryC. Food and HealthD. Science and Art15.The writer thinks it is ______ to announce（宣布）the second-child policy.A. impossibleB. uselessC. meaninglessD. necessaryBThe world itself is becoming much smaller by using modern traffic and modern communication means（工具）.Life today is much easier than it was hundreds of years ago, but it has brought new problems. One of the biggest problems is pollution. To pollute means to make things dirty. Pollution comes in many ways. We see it, smell it, drink it and even hear it. Man has been polluting the earth. The more people there are, the more pollution there is. Many years ago, the problem was not so seriousbecause there were not so many people. When the land was used up or the river was dirty in one place, man moved to another place. But this is no longer true.Man is now slowly polluting the whole world.Air pollution is still the most serious. It's bad for all living things in the world,but it is not the only one kind of pollution. Water pollution kills our fish and pollutes our drinking water. Noise pollution makes us angry more easily.Many countries are making rules to fight pollution. They stop people from burning coal in houses and factories in the city, and from putting dirty smoke into the air. Pollution by sulfur dioxide （SO2）is now the most dangerous kind of air pollution. It is caused by heavy traffic. We are sure that if there are fewer people driving, there will be less air pollution. The earth is our home. We must take care of it. That means keeping the land, water and air clean. And we must pay attention to the rise in pollution at the same time.16.According to the passage,_____, our world isbecoming much smaller.A. because of the rise in pollutionB. thanks to the science developmentC. because the earth is being polluted day and nightD. because the earth is blown away by the wind every year17.Hundreds of years ago, life was ____ it is today.A. as easy asB. much easier thanC.as hard asD. much harder than18.In Paragraph 1, the underlined word " it" means ____.A. rubbishB. noise pollutionC. air pollutionD. water pollution19.Which of the following is NOT trueA. Many countries are making rules to fight pollution.B. The pollution of the earth grows as fast as the world population does.C. The problem of the pollution is not so serious because there are not so many people living on the earth.D. If people could go to work by bus or by bike instead of by car or by motorbike, it would be helpful in fighting against the problem of SO2.三、补全对话A.Do you know what the worlds population is todayB.I’m reading a book about the world's population these days.C.I think we must do something to control the population.D.It’s too bad.E.It was no more than 2 billion.A : What are you up toB:① _______A:Sounds good! What’s it aboutB:It says that 1,000 years ago ,the world’s population was very small.②_____A : ReallyB:Yes, but during the last three or four hundred years, the world’s population has grown very quickly. Today ,it is growing faster than ever.③______A:Sorry, I don't know.B: It’s more than 7 billion.A: It’s so large. ④_______B:Yes. If we don’t control the population ,there will not be enough space on the earth in 600 years.A:⑤______四、根据汉语提示填空1.I don't think money will ______（解决）all my problems.2.Now,some old towns are losing their ______（当地的）character（特色）.3.It's good manners to keep your voice down in ______（公共的）places.4.The night in the countryside is ______（更安静的）than that in the big city.5.—Have you read the ______ (报告) about the world's population —Yes. I read it yesterday.五、书面表达China Youth 正在就城市的人口增长以及它所产生的一系列问题做调查。

2020秋一年级数学实验班第1周周练1、看图写数。

（）（）（）（）2、看数画“”。

5 86 93、找规律，填一填。

4、比一比，填一填。

（1）（2）比（）。

（填“多”或“少”）（）比（）少。

比（）。

（填“多”或“少”）（）比（）多。

5、把小优两只手中的数字加一加，再与对应的得数连一连。

6、小动物们坐着小火车去郊游，你能说说他们的前后顺序吗？（1）在的（前、后）面，在的（前、后）面。

（在正确答案（2）请你圈出前面所有的小动物，请你在最后面的小动物下画“ ”。

7、下图中的小动物都有一个编号，并且排成一横排跳舞。

（1）小猴是4号，小兔是1号，小兔在小猴的（）边；（2）小猪是5号，它的双手伸向它自己的（）边；（3）小猪在大象的（）边。

8、下图是武汉景点地图的局部，如果要从黄鹤楼去往琴台文化艺术中心，应该往哪个方向走？（用“东”、“南”、“西”、“北”表示）答：应该往（）走。

2020秋一年级数学实验班第2周周练1、画一画，使上下两行图形一样多。

（1）（2）2、看一看，比一比，在数量多的动物后面的括号内画“√”。

（）（）3、把数量同样多的动物连起来。

4、小动物们要到房顶修烟囱，请你帮它们选出合适长度的梯子，连一连。

5、小动物们都站在相同的漂浮着的木箱上，哪只小动物最重？哪只小动物最轻？请按照由轻到重的顺序标上1~3的序号。

6、比一比，请在先吃到桃子的小猴下面画“√”。

7、小狗、小兔和小袋鼠比赛跳远，谁跳得最远？请你比一比，按从远到近的顺序，用1、2、3给它们标上序号。

8、哪一边应该下沉？在该下沉的一边画上“√”。

2020秋一年级数学实验班第3周周练1、在下列分解算式对的（）里打“√”，错的打“×”。

2、看图在里填上正确的答案。

3、4、 看图列算式。

5、 小熊要买得数正确的胡萝卜，算一算，帮它圈出来。

6、左边图形加上右边方框内的哪个图形可以拼成一个长方形，圈出合适的图形。

7、小红的围巾破了一个洞，你能帮他挑选一块合适的布补上去吗？=8、下面A、B两个图形，分别是由下边哪两个图形重叠而成？2020秋一年级数学实验班第4周周练1、请你把爬得最高的蜗牛圈出来。

部编版语文五年级上“周周练”9班级_____ 姓名_____ 等级_______ 检查人______一、看拼音，写词语jì zǔyān xūn hánɡ zhōu jū shù nǎi shì yí xiè qiān lǐ rú lǚ bó bīng （）（）（）（）（）（）（）二、解释加点字的意思。

1.死去元知万事空。

（）2.家祭无忘告乃翁。

（）3.西湖歌舞几时休。

（）4.九州风气恃风雷。

（）三说说下列诗句的意思。

1.死去元知万事空，但悲不见九州同。

__________________________________2.我劝天公重抖擞，不拘一格降人才。

_____________________________四根据课文内容填空1《少年中国说》这篇课文首先强调了少年的________，告诉我们，国家的强大要靠少年的强大，紧接着，作者用______、_______、______、______、_______、奇花、干将发硎等做比，告诉我们中国少年前途无量，少年中国前途无量。

2.示儿》这首诗的作者是______代诗人__________。

这首诗通过________________________这两句，表达出诗人对收复失地的强烈愿望。

《题临安邸》这首诗的作者是______代诗人__________。

这首诗描写统治者只顾吃喝玩乐，忘却国耻的诗句是____________________________。

《己亥杂诗》的作者是______代诗人__________。

从_______________________这两句诗中，我们可以看出诗人的愿望。

3.（）初升，其道大光。

（）出伏流，一泻汪洋。

（）腾渊，鳞爪飞扬。

（）啸谷，百兽震惶。

（）试翼，风尘翕张。

（）初胎，矞矞皇皇。

（），有作其芒。

（）戴其苍，（）履其黄。

纵有千古，（）。

沪教版二年级数学上册周周练（第九周）7、3、6、9的乘、除法班级姓名直接写出得数。

3X6= Q---;-6 = 7X7-25=21---;-7=95-73=55-6X5=65+18=7X5=45---;-9-3=64---;-8 =6X9=8+8X9=－在0中填上“十”“一""X"或"-;-"'使下面各算式成立。

70707=56 30303=360606=30 90909=8二．（）里最大能填几？6X ()<20 ()X4<33 3X()<2X9 38>7X()6X ()<40-5 9X()<19+25（)X6<9X5 （) X9<46+18 四．概念填空。

1. 3个6就是6的（）倍，也是9的（2. 15、18、27、36、81中，（）和（3. 55-吵—吵－吵-•-•=35,•= (）倍。

）是3、6、9共同的倍数。

）。

4.(）比24多16;59比（）少21。

沪教版二年级数学上册周周练（第九周）参考答案直接写出得数。

3X6=18 Q---;-6=0 7X7—25=2421---;-7=3 95—73=22 55—6X5=2565+18=83 7X5=35 45---;-9—3=264---;-8 =86X9=54 8+8X9=80－ 在0中填上“十”“一""X"或"+",使下面各算式成立。

心7C±) 7=56 3G)心3=3心心6=3090心9=8三此题答案不唯一。

］二．（）里最大能填几？6X (3) <20(8)X4<333X (5)<2X9(7) X6<9X538>7 X(5)6X (5) <40—59X(4)<19+25(7) X9<46+18四．概念填空。

1.3个6就是6的(3 )倍，也是9的(2 )倍。

九年级上学期周周练质量检测一、单项填空(每小题1分，满分15分）( )1. All of us feel ______with the trip.A. pleasant; pleasingB. pleased； pleasingC. pleasant; pleasedD. pleased； pleasant ( )2. The music ______by Tan Dun sounds______.A. was written； wonderfulB. written； wonderfullyC. was written; wonderfullyD. written; wonderful( )3. Eddie was sleeping ______Millie was reading a magazine.A. untilB. whileC. beforeD. after( )4. ______ an actress, Gong Li ______awards for her films.A. As; is known for winningB. Like;isknown as winningC. As; is known as winningD. Like; is known for winning ( )5. The film festival ______some actors and filmmakers.A. is open forB. is open toC. is open asD. is open with( )6. There are no buses, _______ you’ll have to walk,A. soB. orC. butD. for( )7. I knew nothing about the accident _______ Millie told me.A. whenB. asC. untilD. after( )8. Have you decided ______abroad ______?A. to go; for further studyB. to go to; for study furtherC. to go; for study furtherD. to go to; for further study ( )9. _______ he exercises every day ______he is very healthy.A. Because; soB. Because； throughC. Because； /D. Though； /( )10. Since 1991，Jack ______an engineer.A. becameB. has beenC. wasD. had been( )11. By the speed of water flow, Tan made over 50 sounds from water.A. controlledB. controlC. controllingD. controls( )12. We should' give the boy another chance _____ he has made some mistakes.A. thoughB. whenC. unlessD. because( )13. Did you notice that Jim ______ swimming?A. has a real gift asB. has areallygift forC. has a real gift forD. has areallygift as( )14. ______ we are young，we shouldn’t be too afraid of making mistakes.A. ForB. BecauseC. SinceD. Because of( )15. He spoke so fast that lie was ______.A. out of breatheB. breathe heavilyC. out of breathD. breath heavily二、完形填空（每小题1分，满分10分）Angela has been crazy about writing since she was young. She got her first lesson m story-telling from her grandfather, who gave her words of love. He set off her imagination and influenced W much. Angela always had stories running __1 her head and as soon as she could write, she put them down on paper.Angela__2 remembered the call that changed her life. It was Tuesday, February18th when the telephone rang in the kitchen of her Los Angeles home. On the line was Marty Banderas, a literary agent(代理) to whom she had sent a draft of her novel three weeks earlier. She asked Angela some __3 information, like age and health condition.Angela felt strange and asked what that was about. Banderas only replied, “I’ve just sold your __4 for one and a half million dollars!”She sat down in shock. She had written over fourteen novels in twenty years, but each one had been __5 by publishers(出版商). Many people would have been discouraged(气馁的）,__6 not her. Each time，she just got down to writing another one. Her husband advised her to find something else to do, but she never__7 . Seeing this book published was the most__8 thing that has ever happened to her.Now she is a mother of three children, but she has never stopped writing, turning out novels between kids and dishes. She is writing another novel now, and she expects another success. Yes, her belief has brought her __9 ，and it has changed her life__10 . Angela is fully confident that she will enjoy a more successful and meaningful life as long as she keeps on with her dream.( )1. A. through B. with C. along D. across( )2. A. hardly B. probably C. clearly D.usually( )3. A. local B. public C. personal D.national( )4. A. Painting B. novel C. newspaper D. magazine( )5. A.accepted B. agreed C. refused D. enjoyed( )6. A. so B. or C. and D. but( )7. A. came back B. gave up C. went away D. got down( )8. A.boring B. tiring C. exciting D.interesting( )9. A. freedom B. success C. friendship D. beauty( )10. A. in time B. in public C. in return D. in surprise三、阅读理解(每小题2分，满分30分）(A)The song Happy Birthday to You is an example of just how interesting the world is. Think about this song---it is only 6 notes. Yet it is one of the best-known songs in the world. It was written in 1893 by Mildred and Patty Hill and first published with the words, “Good morning to you”.The words“Happy Birthday to You”were first seen in print in 1924, although the author is unknown. The Clayton F. Summy Company became the song’s publisher in 1935. Through a series of purchases and acquisitions(收购), the song now belongs to AOL Time Warner. ASCAP represents the song for public performancelicensing.The copyright to Happy Birthday to You should have expired(过期) in 1991, but copyright Act of 1976 extended(延长）it，and the Copyright Term Extension Act of 1998 extended it again, so the song is protected until 2030 at least.Happy Birthday to You brings in about $ 2 million per year. If you ever hear the song in a movie, TV show or an ad, a licensing fee has been paid. Any manufacturerthat plays the song pays a licensing. The manufacturer of any musical card playing the songs pays a licensing fee. This 6-note song is a big business!( )1. The song Happy Birthday to You was published first _____.A. in 1893B. in 1924C. in 1935D. in 1991( )2. The song Happy Birthday to You now belongs to ______.A. Mildred and Patty HillB. the Clayton F. Summy CompanyC. AOL Time WarnerD. nobody( )3. The copyright to Happy Birthday to You has been extended until ___ at least.A. 1935B. 1991C. 1998D. 2030( )4. If you play the song in your movie, you should _____.A. bring some moneyB. make a toyC. pay a licensing feeD. have a big business( )5. The best title for this passage is ______.A. How Music Licensing WorksB. The Tale of Happy Birthday to YouC. Licensing the Song of Happy Birthday to YouD. To Know More about AOL Time Warner(B)( )6. If you want to join the Sunshine Rock Band, you should play the ______well.A. pianoB. guitarC. drumD. violin( )7. Who can teach you to play table tennis?A. Mike.B. Joe.C. Mr. Zhang.D. Karen.( )8. You want to learn to play table tennis. Then you can go to Lantian Hotelon _____.A. FridaysB. SaturdaysC. SundaysD. Mondays( )9. You want to teach children to swim. Then you can call_______.A. 5487-6598B. 8665-7868C. 8472-9999D. 556-8823( )10. The ads(广告)above may be from ______.A. a newspaperB. a story bookC. a science bookD. a guidebook(C)There are several ways you can find out about the countries and places you wish to visit. You can talk to friends who have traveled to the places, you can go and see a colour film about them, or you can read a travel book.It seems that there are three kinds of travel books. The first are those that give a personal, subjective(主观的) idea of travels which their writer has got himself. These books can be useful if the writers share their traveling experiences with others. The second kindare those books which give objective(客观的) information of things to be done and seen.If a cultured person has written such a book about the facts of a place, then it is more useful. The third kind are those books which are called “a guide”to some place or other. If they are good, they will describe and explain the place in detail. Like the first kind , they can be interesting and exciting, but their main purpose is to help the reader plan his travel in the most practical way.Whatever kind of travel book you choose, you must make sure that the book does not describe everything as interesting, exciting or fantastic. You must also keep an open eyes on its date of publication(出版) because travel is very practical matter and many things change quickly in the 21st century. Finally, you should make sure that it’s easy to find the useful information for you travel.( )11. The passage was written to introduce_______.A. travel mapsB. travel booksC. travel filmsD. travel places( )12. The writer of the first kind of travel books gave his ideas after he _______.A. traveledB. read booksC. a lot of experienceD. surfed the Internet ( )13. The underlined phrase “a cultured person”means a person with ________.A. a good appearanceB. a good educationC. a lot of experienceD. a lot of money( )14. The date of publication must be noticed because ________.A. the prices of travel books may be differentB. the writers of travel books may be differentC. the information in travel books is always the sameD. the information in travel books is always changing( )15. According to the passage, it is best to read ______ before traveling to a place of interest.A. the first kind of travel booksB. the second kind of travel booksC. the third kind of travel booksD. some travel articles in newspaper四、词汇检测(每小题1分，满分10分）根据下列句子及所给汉语注释或通过上下文，写出空缺处各单词的正确形式。

计算周周练1（小数乘法）一、口算。

（42分）0.5×0.2= 30×0.4= 1.2×30= 4.5×0.2= 5×2.4= 0.05×100= 2.7×100= 90×0.08= 3.03×2= 0.6×0.05= 1.2×0.7= 3.5×2= 0.04×2.5= 1.25×8= 1.6×3= 200×3.4= 4.4×0.2= 2.1×0.02=3.21×0.2= 1.5×20= 2.5×40=二、竖式计算，带*的需要验算。

（22分）5.79×0.67= 61.5×20= *8.2×5.4=*9.4×8.2= 11.5×81= 0.036×2.1=三、按要求计算下列各题。

（12分）1、得数保留一位小数3.64×2.6≈0.325×2.4≈2、得数保留两位小数0.118×2.4≈9.08×0.027≈四、计算下列各题，怎样简便就怎样算。

（24分）0.25×102 1.25×3.3×82.8×3.6+1.4×2.8 0.36×5.2+4.80.57×0.5×0.4 0.8×（0.125+1.25）计算周周练2（小数乘法）一、口算。

（42分）0.8×0.5= 70×0.2= 2.2×20=1.5×0.4= 4×1.2= 0.03×200= 6.3×100= 90×0.02=2.02×6= 0.2×0.08=3.2×0.5= 0.9×2= 0.08×2.5= 12.5×0.8= 2.3×4= 800×1.2= 7.4×0.02=4.3×0.05=0.25×0.4= 3.5×40= 5.1×30=二、竖式计算，带*的需要验算。

江都区宜陵中学2021-2021学年七年级英语上学期周周练〔9〕〔无答案〕人教新目的版本卷贰O贰贰年贰月捌日编写；出题人：令狐学复；欧阳化语；令狐理总。

重点短语1. do morning exercises2. do one’s homework3. go to sleep4. do after-school activities5.have fun6. wake up7. have breakfast/lunch/dinner 8. have lessons9. get up 10. after dinner11. spend time doing sth. 12. send e-mails13. the Swimming Club 14. be nice to sb.15. two hours a day 16. chat with sb.17.have a good time 18. my best friend19. at noon 20. twice a week典型练习一、根据句意及首字母或者汉语提示写单词1. It’s seven o’clock in the morning. It’s time to eat b________.2. His son often does h________ at seven o’clock in the evening.3. Now it’s nine o’clock in the evening, you must go to s________.4. Don’t w________ him up. Let him have a good rest, he is too tired.5. Sandy doesn’t go to school today b________ she is ill.6. We can get books from the school l________.7. T________ is the third day of a week.8. Millie doesn’t w________ TV. He has lots of things to do.9. We often do all kinds of ________ (活动) after class.10. We often do morning ________(早操) at 8:00 in the morning.11. What’s your f________ game?12. We are good friends .We often help e________ other.13. Do you often send e________ to your pen friends?14. We need to p________ speaking, listening, writing and reading to learnEnglish well.15. Don’t speak loudly in the l________. It’s a place for reading.16. Do you k______ a diary (日记) every day?17. On Sundays, I often c________ with my friends on the Internet.18.They have a (数学) lesson every day.19. My father loves r________ newspapers.20. Are they n________ to you?二、用所给单词的适当形式填空1.Please give my best ______________ (wish) to your friend for me.2. I want ________ (go) to sleep after breakfast.3. Some dogs just don’t know how ________ (have) fun.4. What about__________(购物) in the supermarket at the weekend?5. He’d like ________ (tell) you about his school.6. This is our ________ (one) English lesson.7. It’s time ________ (go) to school.8. There ________ (be) a lot of people in the park.错题新练一、单项选择1. ________ lunchtime, I often chat ________ my friends in the playground.A. At; forB. For; withC. At; withD. For; at2. I love my new school. All my new classmates are ________ me.A. nice toB. kind ofC. kind forD. nice for3. I like English ________ I think it is interesting.A. soB. butC. becauseD. or4. The school day ________ at eight every morning.A. startsB. startC. to startD. starting5. I spend about two hours a day ________ my homework.A. doB. doesC. doingD. to do6. —How often do you play a ball game at school?—________.A. All dayB. One hourC. Once a dayD. Half an hour7. Sandy likes ________, but Lily likes to ________.A. swimming; play volleyballB. swim; play volleyballC. to swim; playing volleyballD. swim; playing volleyball8. ---We’re going to have a football match with Class1.----________ .A. Thank youB. Let me seeC. Wish you good luckD. Have a good time9. Who ________ a member of the Computer Club? Please raise your hand!A. want toB. wants toC. want to beD. wants tobe10. It’s time for class, please wake ________ up.A. theyB. themC. theirD. theirs二、改错〔每句只有一处错误，找出并改正〕1. It isn’t good for you to watch too many TV. ( ) ________A B C2. Is he often take the bus to go to school? ( ) ________A B C D3. Thank you for give the card to me. ( ) ________A B C D4. Amy spends lots of money to buy her clothes. ( ) ________A B C D本卷贰O贰贰年贰月捌日编写；出题人：令狐学复；欧阳化语；令狐理总。

某某省第五中学2015-2016学年高一下期第九周周练生物试题第I卷（选择题）一、单选题1．基因重组、基因突变和染色体变异三者的共同点是A.都能产生可遗传的变异B.都能产生新的基因C.产生的变异均对生物不利D.产生的变异均对生物有利【答案】A【解析】基因突变、基因重组和染色体变异都是可遗传变异，A正确；只有基因突变才能产生新基因，B错误；基因突变和染色体变异具有多害少利性，C错误，D错误。

【点拨】本题考查的是有关生物变异的相关知识。

2．有性生殖后代具更大的变异性，最根本的原因是A.基因突变频率提高B.染色体结构变异机会多C.产生新的基因组合机会多D.更易受环境影响而发生影响【答案】C【解析】有性生殖的生物在减数分裂形成配子时，由于有同源染色体的自由组合和交叉互换，形成了多种多样的配子。

在受精过程中雌雄配子的结合是随机的，因此产生新的基因组合机会多，使后代具有更大的变异性和生活力，所以有性生殖后代具更大的变异性，最根本的原因是产生新的基因组合机会多，C正确。

【点拨】本题考查的是有关基因重组的相关知识。

3．长期接触X射线的人群产生的后代中遗传病发病率明显提高，主要是该人群生殖细胞发生A.基因重组B.基因分离C.基因互换D.基因突变【答案】D【解析】X射线属于诱发基因突变的物理因素，因此长期接触到X射线的人群，后代中遗传病的发病率明显提高，其主要原因是这一人群的生殖细胞很可能发生基因突变，D正确。

【点拨】本题考查的是有关基因突变的相关知识。

4．一个染色体组应是A.配子中的全部染色体B.二倍体生物配子中的全部染色体C.体细胞中的一半染色体D.来自父方或母方的全部染色体【答案】B【解析】配子中的全部染色体可能含有一个染色体组或含有多个染色体组，A错误；二倍体生物配子中的全部染色体称为一个染色体组，B正确；染色体组是指细胞中的一组非同源染色体，体细胞中的一半染色体不一定是一个染色体组，例如，八倍体小黑麦体细胞中的一半染色体含有四个染色体组，C错误；染色体组是指细胞中的一组非同源染色体，不一定全部来自父方或母方，D错误。

初三英语第九周周周练2014.10一、单选:（本大题共14小题，每小题1分，共14分）( )1.—The Ipad looks like ________ one I showed you last time, but if you take _______ second look, you will find it’s a different one.A. /; theB. the; theC. the; aD. /; a( )2.—I wonder if he ______ in the discussion tonight?---I believe if he _____ his homework, he will join us.A. will join, finishesB. will join, will finishC. joins, will finishD. joins, finishes( )3.--Tea or juice? --_______. I prefer coffee ______ milk.A. Either, toB. Either, withC. Neither, toD. Neither, with( )4. Not only Mr. and Mrs. Green but also their daughter ________ abroad twice.A. have goneB. have beenC. has goneD. has been( )5. Without her glasses, she was ______________ blind.A. as far asB. as much asC. as good asD. as well as( )6. I’m not sure_______.A. that has he been to Hong KongB. if has he been to Hong KongC. if he has been to Hong Kong or notD. whether he has been to Hong Kong or not( )7. I feel angry because I don’t know ________________________ the problem.A. What to deal withB. what I should deal withC. How to do withD. how I should deal with ( )8.The cakes in the restaurant _______, so they ______ well.A. are tasted better, are soldB. are tasted well, sellC. taste terrible, are soldD. taste nice, sell ( )9. –Are you sure you can do well in tomorrow’s test, Sandy?--_____. I’ve got everything ready.A. It’s hard to sayB. I’m afraid notC. I think soD. I hope not( )10.I feel weak and tired after work, so I should wear _____clothes to make myself feel ____.A. blue, more peacefulB. yellow, wiserC. orange, happierD. green, more energetic( )11. The rich woman is always ___________her wealth(财富). Nobody is willing to talk with her.A. shows herselfB. shows offC. showing upD. showing off( )12.Everyone ____at the good news.A. cheered upB. was cheered onC. was cheered upD. cheered on( )13. Usually , Betty _____ in colourful T-shirts in summer.A. wearsB. is dressedC. is wearingD. dresses( )14. It’s quite clever ________ you _______ out the problem.A. for; workingB. for; to workC. of; workingD. of; to work二、完型填空:（本大题共10小题，每小题1分，共10分）Teenagers usuall y experience changes on all levels --- physical and emotional (感情的). Some may feel uncomfortable when in new situations, such as talking to strangers. But with small talk, you may 1 fit into the new environment.Small talk is a light conversation for social occasions (社交场合). 2 it usually doesn’t have much detail(细节), it is the starting point for friendships.Childr en can use small talk to 3 a conversation in many different ways.Askin g open questions is one of the most useful ways. For example, you are at someone’s birthday party, but you know 4 people. How do you break the ice? You can start a conversation with ―This is a great party. How do you know the host?‖ This way is also 5 in many other situations, such as school clubs or picnics.Sometimes, s imply an 6 works, especially to help find common ground(共同点) with others. For example, when going into a new environment, you can introduce yourself by saying ―I am in Class 2. My 7 teacher is Mr Black.‖ The other person may say, ―Oh,really? He is also my math teacher. He is very strict ...‖ See?A good conversation begins.The third wa y is t o find your strong points and 8 it to others. This is useful when you want to 9a group. For example, you see boys playing soccer on the school playground. Just say, ―Do you need more players?I am a very good goalkeeper(守门员).‖So next ti me, do n’t be 10 when meeting strangers. Just try small talk. A stranger may become your next friend.( )1. A. nearly B. slowly C. easily D. hardly( )2. A. But B. Although C. Because D. And( )3. A. have B. start C. end D. stop( )4. A. some B. any C. little D. few( )5. A. helpful B. helpless C. interesting D. boring( )6. A. information B. action C. education D. introduction( )7. A. Chinese B. history C. math D. English( )8. A. show B. give C. sell D. offer( )9. A. take B. join C. know D. love( )10. A. surprised B. comfortable C. nervous D. relaxed三、阅读:（本大题共5小题，每小题2分，共10分）If you are like most people ,your intelligence (智力) changes with the seasons ,You are probably a lot sharper in the spring than you are at any other time of year . A famous scientist ,Ellsworth Huntington (1876—1947)，concluded (总结) that climate and temperature have an effect (作用) on your mental abilities (智力).He found that cool weather is much more favorable for creative (激活) thinking than summer heat .This does not mean that all people are less intelligent in the summer than they are during the rest of the year. It does mean, however , that the mental abilities of large numbers of people tend to be lowest in the summer .Spring appears to be the best period of the year for thinking One reason may be that in the spring man’s mental abilities are affected(受影响)by the same factors (因素) that bring about great changes in nature .Fall is the next-best season ,then winter .As for summer ,it seems to be a good time to take a long vacation from thinking .( ) 1. Ellsworth Huntington decided that climate and temperature have ______A. a great effect on everyone’s intelligenceB. some effect on most persons’ intelligenceC. some effect on a few persons’ intelligenceD. no effect on most persons’ intelligence( ) 2. Why is spri学科王ng the best season for thinking ? Because _______________.A. all nature ,including man ,is growing thenB. it lasts longer than the other seasonsC. it is not too warm and not too coldD. both B and C( ) 3. The two best seasons for thinking seem to be _____________.A. spring and fallB. winter and summerC. summer and springD. fall and winter( ) 4. Which is the following is wrong ?A. It seems that the cold of winter is better for thinking than very hot weatherB. Perhaps Huntington based (以…为基础) his conclusion (结论) on work with persons in the same climateC. Fall is the second best season for thinkingD. Both A and B are wrong( ) 5. The main idea of this passage is that ____________.A. most people’s intel ligence changes with seasonsB. seasons are the reason of the changing intelligenceC. spring is the best season for thinkingD. summer is the best season for taking a long vacation四、词汇运用（本大题共8小题，每小题1分，共8分）(A) 根据句意和汉语注释，在答题卡标有题号的横线上，写出单词的正确形式。