肉汤变酸是由微生物引起的，这些微生物来自于空气，这一假设成立是由______证明的[]A．达尔文B．巴斯德C．施莱登D．施旺-七年级生物

更多内容推荐

• I am busy _________ English in my room.[ ]A. to readB. readingC. read-七年级英语
• 按照生物间的共同特征将其分类的学科被称为[]A．发育学B．生物学C．分类学D．演化论-七年级生物
• They always have a great time _____films.[ ]A. watchingB. watchC. watched D. watches-八年级英语
• 生物学是研究生物的形态、_______、________、生理、遗传和变异、_______、生态的科学。-七年级生物
• Sun Tao enjoys ________. [ ]A. eat fish B. run C. to swim D. playing tennis -七年级英语
• Thanks for _________ me. [ ]A. helpingB. to helpC. help-七年级英语
• 下图是生物学的发展与人的寿命的关系图，请据图回答：(1)生物学的发展与人的寿命有着什么关系？(2)为什么会出现如图所示的关系？-七年级生物
• Did the children have a great time _____ the party?[ ]A. prepareB. preparedC. preparing D. to prepar
• 被称为“分类学之父”的科学家是[]A．沃森B．达尔文C．林奈D．克里克-七年级生物
• 请将科学家与相应的研究成果用线连接起来。A．林奈a．DNA分子双螺旋结构B．达尔文b．生物分类系统C．哈维c．物种起源与生物进化的理论D．沃森和克里克d．血液循环-七年级生物
• 根据句意和汉语注释，写出单词的正确形式。1. We are writing to you about _____(保护) wild animals.2. Wolves have very good e
• The West Lake in Hangzhou is a good place to go _______. [ ]A. hiking B. skateboarding C. washingD.
• Do you like _____ books?[ ]A. readB. reading C. see D. seeing-七年级英语
• 生物进化论的创始人是[]A．达尔文B．哈维C．林奈D．拉马克-七年级生物
• 下列哪一项不是达尔文的贡献[]A．认为地球上所有生物都来源于原始的共同祖先，不同的生物之间存在着亲缘关系B．认为人类是由古猿演化而来的，人类的祖先可能生活在非洲C．用自然-七年级生物
• 写出下列动词的-ing形式。1. play 2. dance 3. run _______________-七年级英语
• Millie, do you enjoy_____ in the sea?[ ]A. to swim B. swims C. swimmingD. to swimming-七年级英语
• Do you care about ______ the environment and ______ energy?[ ]A. protect; saveB. protecting; saveC.
• 下列哪一项说明人类的生产需要生物科学知识[]A．三峡大坝截流选择在枯水期B．“神舟”五号飞船进行第五次飞行试验C．利用细菌生产、制造动物胰岛素D．纳米材料用于衣服制作-七年级生物
• 请将科学家与相应的研究成果用线连起来林奈提出“生物学”达尔文生物分类系统哈维物种起源与生物进化拉马克血液循环沃森和克里克DNA分子双螺旋结构-七年级生物
• 血液循环的发现者是[]A．林奈B．达尔文C．哈维D．克里克-七年级生物
• 下列哪种职业与生物学没有联系[]A．园艺家B．司机C．医生D．药剂师-七年级生物
• 用所给词的适当形式填空1. June 1st is ________(child) Day. 2. One of his ________(tooth) is bad. 3. Let's g
• Would you mind _____up the room for me?_____. I'll do it at once.[ ]A. to tidy; All right B. ti
• Aunt Li likes ______ bananas. [ ]A. eat B. eatingC. eatsD. eatting-七年级英语
• Does she like _____? [ ]A. play soccer B. playing ping-pong C. play volleyball D. plays basketball -
• My father gave his old car to me and he is_____ a new car. [ ]A. considered buying B. considered to
• The boy started _______ English three years ago.[ ]A. learnsB. learnC. learnedD. learning-七年级英语
• 生物科学家在哪一年已经初步弄清了人类基因组图谱[]A．1999年B．2000年C．2001年D．1916年-七年级生物
• 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
• 形形色色的生物究竟是怎样由地球上最初的原始生命演变来的呢？科学家进行了长期的探索。图5目前，已发现了许多关于生物进化的新证据，这将使人们对生物进化的认识不断丰富和深-七年级生物
• 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