20世纪50年代，美国科学家沃森和英国科学家克里克共同发现________的双螺旋结构。-七年级生物

更多内容推荐

• Daniel likes_____ basketball, but he_____ at home right now. [ ]A. plays; is sleepingB. playing; sle
• —Do you like _____ TV? —Yes, very much.[ ]A. seeingB. watchingC. looking D. reading-七年级英语
• You must have spent hours_____ it up.[ ]A. to clean B. cleaningC. cleanD. cleaned-八年级英语
• 参与人类基因组计划研究的国家有①美国②德国③法国④英国⑤日本⑥中国⑦韩国[]A．①②③B．②③C．④⑤⑦D．①②③④⑤⑥-七年级生物
• Thanks for_____ us. [ ]A. join B. to join C. joins D. joining-八年级英语
• Daniel prefers staying at home to _____swimming. [ ]A. go B. goes C. going D. went -七年级英语
• Did you spend 20 dollars_____ this computer game? [ ]A. to buy B. pay C. buyingD. paying -七年级英语
• Thanks for _____ me so many new books.[ ]A. to give B. givesC. giving D. give-七年级英语
• 根据句意用所给词的正确形式填空。1. He thought carefully before _____ (reply).2. The police are stopping cars and che
• 植物常用的分类单位是[]A．界、门、纲、目、科、种B．门、纲、目、科、属、种C．种、属、科、目、纲、门D．门、纲、科、目、种、属-七年级生物
• Thanks for_____me so much, Linda.[ ]A.helpB.helpingC.to helpD.helps-七年级英语
• I like _____, but I like_____ TV this evening.[ ]A. to read; watching B. reading; to watch C. to wat
• Daniel is_____ his purse, but he can’t_____ it. [ ]A. looking for; findB. seeing; look forC. finding
• _____some lettuce and green onion into the pancake makes it more delicious. [ ]A. Put B. Puts C. Put
• At the beginning ofleaming English,I had a lot of trouble _____with otherpeople in it. [ ]A. communi
• We spend about an hour a day _____. [ ]A. do our homework B. doing our homework C. do our homeworksD
• He spends a lot of time _____ computer games.[ ]A.plays B.playingC.to play D.play-七年级英语
• Do you often go _____?[ ]A. a hike B. hike C. hiking D. to hike-八年级英语
• What's the matter, Miss Lin? I am having trouble_____ out who has taken away my book on this de
• I'm thinking about ______ to the mountains for vacation. [ ]A. goB. wentC. goingD. to go -八年级英语
• How about _____ him for _____ ?[ ]A. taking; a walk B. taking; walk C. take; a walk D. take; walking
• Miss Gao likes music. She spends a lot of money _____ CDs.[ ]A. to buyB. buyingC. buysD. buy-八年级英语
• 根据句首字母补全单词。1. Thailand is a beautiful country, many people go s_____there year.2. It's an e____
• He enjoys _____ the radio. [ ]A. to listenB. 1istening to C. 1isten to D. 1istenning to-七年级英语
• Amy likes _____. She is good at _____. [ ]A. swims,swimming B. swimming,swimsC. swimming,swimmingD.
• Can you finish______ the book in a week? [ ]A. read B. to read C. readingD. reads-八年级英语
• —How can I learn more about computer science? —You can learn by_____ questions. [ ]A. asked B. askin
• Usually, when we see our teachers come into the classroom, we all stop _____and get ready for class.
• —Would you mind_____ a favor?—Not at all.[ ]A. doing meB. do IC. doing myD. to do me-八年级英语
• I felt a little tired, so I stopped ______ and had a rest. [ ]A. workingB. workC. to workD. worked-八
• Does Amy finish ______ the homework ?[ ]A.to do B. doC. does D. doing-七年级英语
• 下列各句中均有一处错误，请找出并改正。1. What about write a report about that?2. I learn Russian by me.3. I hope seeing
• Thanks for_____ care of my dog when I was away. [ ]A. take B. took C. taking D. takes-七年级英语
• －What about_____ riding bike?－That_____good.[ ]A. go soundsB. goingC. going soundsD. going is soundi
• 句型转换。按要求完成下列句子，每空一词。1. It is necessary to do eye exercises between classes. (改为同义句) _____ eye exerci
• I'm going______ for vacation. [ ]A. fish B. fishingC. to fishD. fishes-八年级英语
• 下列各句均有一处错误，请找出并改正。1.Thank you for invite me._______________________2.Mary feels very happily. ______
• Thanks for ____ me to your party.[ ]A. ask B. to askC. asksD. asking-八年级英语
• He is looking forward to ________.[ ]A. my come B. my coming C. my comesD. my to come-七年级英语
• I hate _ __ basketball with that kind of man.[ ]A. playingB. playC. played D. plays-八年级英语
• —Mike doesn't look happy. What's wrong with him?—It seems that he has some trouble ______
• —What are your hobbies?—I enjoy ______ music.[ ]A. dance toB. dancing ofC. dancing toD. to dance in-
• 根据句意,用括号中所给词的适当形式填空。1.Computers are used by people for ______ problems. (do)2.Spaceship ______people
• 用所给词的适当形式填空。1. I'm going_____(sightsee) in Italy.2. She plans_____(have)a very relaxed vacation
• 根据首字母完成单词。1. When the boy is free, he often goes bike r_____.2. He thinks about going s_____ in Hain
• I am good at ______ badminton.[ ]A. playB. plays C.to playD.playing-七年级英语
• I'll stop ____ English. I think it's boring.[ ]A.learn B.to learnC.learningD.learns-八年级英语
• Tom practices ____ table tennis every day to win the game.[ ]A. playB. playsC. playing D. to play-八年
• I prefer ______ to ______.[ ]A. running; swimB. swim; runningC. running; swimmingD. swim; run-八年级英语
• 用方框内所给单词的适当形式填空。little skateboard play keep eat two1.My _____ habits are pretty good. So I am very h