“孑孓”是蚊子的幼虫，适于生活在水中。几个同学对“孑孓的生活是否需要空气”的问题争论不休：有的认为需要空气，有的认为不需要空气。请你根据下图设计一个实验探究该问题。（1-七年级生物

更多内容推荐

• My computer______.[ ]A. isn't work B. not works C. don't workD. doesn't work-七年级英语
• How _____ your mother_____ fruit salad?[ ]A.do, doB.does, makeC.does, doD.do, make-八年级英语
• What _______ he usually have _______ breakfast? [ ]A. do; for B. do; at C. does; for D. does; with -
• 句型转换。1．She does her homework at home every day．(改为否定句) She_____ _____her homework at home every day.
• The Indian old lady ________ live there ________. [ ]A. no; any moreB. does not; any more C. no, any
• Why ____ Susan have blue eyes?[ ]A.doesB. doC. isD. /-七年级英语
• 根据所给词的适当形式填空。1. Daniel_____ (not want) a new computer. 2. My sister is a member of the _____(swim) C
• 用所给词的适当形式填空。1. Daniel _____ (not want) a new computer. 2. Where do _____ (he) friends come from? 3.
• _____ eveyone in his class_____ watching TV? [ ]A. Is, likeB. Do, like C. Does, like D. Are, like -七
• 句型转换1. Mr More stays in Shanghai for three days. (就画线部分提问)______ ______ ______ Mr More ______ in Sha
• 按要求改写句子。1.The poor little boy coughed the whole night. (对画线部分提问) _____ _____ _____ the poor little b
• 生物生存所需要的基本条件有____________、阳光、空气和水，还有适宜的________和一定的生存空间。-七年级生物
• ______ your teacher ask you a lot of questions in class?[ ]A. Do B. IsC. Are D. Does-七年级英语
• 用所给单词的适当形式填空。1. The child ______ ______ (not like) the new doll. 2. ______ (we) school is very beaut
• -Who sits behind you?-No one __________.[ ]A. itsB. canC. isD. does-八年级英语
• —_________ Miss Wang like ice cream?—No, he likes salad very much. [ ]A. Does B. DoC. IsD. Are-七年级英语
• 句型转换。1. He has enough time. (改为否定句) He _________ _________ enough time.2. What's wrong with you
• 用所给动词的适当形式填空。1. Mike_____ ( not like) reading picture books.2. It's five o'clock. The chil
• Dad _____ lunch at home. [ ]A. isn't has B. doesn't hasC. don't haveD. doesn't h
• Lucy has more foreign friends than Lily _____.[ ]A. is B. have C. wasD. does -八年级英语
• 按要求改写句子。1. He walks to school every day. (改为否定句)He ________ ________to school every day.2. The twins
• _____ your father usually go to work by car? [ ]A. Do B. Is C. Does D. Are -八年级英语
• 按要求完成下列句子，每空一词。1. The boys used to swim in the river. (改为否定句) The boys _____ _____ to swim in the ri
• Where _____ she _____? [ ]A. are, fromB. does, fromC. is, come fromD. does, come from -七年级英语
• 用所给词的适当形式填空。1. The boy ______ (not like) French fries. 2. I think English is very ______ (interest).
• 按要求改写句子。1. My mother takes the bus to work every day.（改为否定句） My mother__________the bus to work ever
• -______ she ______ at six every day?-No, she doesn't.[ ]A. Does, get upB. Does, gets upC. Is, g
• 句型转换。 1. Jim has lunch at school on weekdays. (改成一般疑问句)Jimlunch at school on weekdays? 2. The window
• 句型转换。1. She does her homework every day. (改为否定句) Sheher homework every day. 2. It's time for br
• 句型转换。1. He has a tennis racket. (改否定句) He _______ _______ a tennis racket. 2. That is her watch. (改为
• 句型转换。 1. Millie makes model planes on Saturday afternoon. ( 改为否定句) Millie _______ _______ model plan
• Everyone _____very happy at the fashion show last Sunday. [ ]A. is B. are C. was D. were -七年级英语
• 将下列句子变为否定句。1. He goes to school at 7: 30. ___________________________2. Lingling has lunch at school
• 用所给单词的适当形式填空。1. She_____ (not like) singing at the party.2. At the weekend, I usually go_____ (run)
• 句型转换。1. My sister likes sports. (改为否定句)_______________________________________________2. My grandpar
• —How much ________ this pair of shoes _________ ?—Thirty yuan.[ ]A. does…takeB. do…costC. do…spendD.
• 按要求改写句子。 1. Mike has breakfast at six in the moming. (改为否定句) Mike ____ ____ breakfast at six in the
• 句型转换。1. He studies at No.1 Middle School. (改为否定句) He __________________ at No.1 Middle School.2. He
• What time _______ you _______ (get) home last night?[ ]A. did; got B. do; gotC. do; getD. did; get -
• 句型转换。1. Eddie goes to sleep after breakfast. (改为一般疑问句) ________ Eddie ________ to sleep after breakf
• 句型转换。1. He likes playing volleyball with his classmates. （改为一般疑问句）__________________________________
• — ______ your friend like English? — Yes, he does. [ ]A. Does B. Do C. Is D. Are -七年级英语
• 按照要求完成下列句子。 1. Mike has some books. (改为否定句)Mike _______six books. 2. My pen friend lives in England.
• My little brother _____ any homework on Sunday. [ ]A. doesn't B. don't do C. doesn't
• 用所给单词的适当形式填空。1. Mr Lee_____ (not like)it at all.2. Excuse me, could I _____ (sit) here?3. My family
• Whattime ____ yourbrother____ dinner ? [ ]A. do , hasB. does,have C. do ,have D. does,has-七年级英语
• I like red but my brother ________. [ ]A. likes red, too B. doesn't C. does D. doesn't lik
• 这些句式你掌握了吗？按要求改写下列句子。1. My father has been a worker for 15 years.( 就画线部分提问) _____ _____has your fathe
• 按要求改写下列句子。1. She has to go home now. (改为否定句) She_____ _____ to go home now.2. They didn't talk
• 用所给词的适当形式填空。1．How often _____(do) she watch TV?2．Millie usually watches TV _____(two) a week. 3．Woul