食物网中的害虫在其生态系统中扮演的角色是（）A．生产者B．消费者C．分解者D．非生物部分-生物

更多内容推荐

• 一个完整的生态系统的组成应包括．（）A．全部的食物链和食物网B．生产者、消费者和分解者C．各种动物、植物和阳光D．非生物部分和生物部分-生物
• ---Listen! Someone is knocking at the door. Who _____it be?---It _____be Tom. He phoned to visit me
• _____pandas from China?[ ]A. Are B. IsC. Do D. Does-七年级英语
• My mother ill last week.[ ]A. is B. are C. was D. were-八年级英语
• Ten glasses of coffee enoughus.[ ]A. is; for B. are; for C. does; toD. do; to-八年级英语
• —_____I use your dictionary, Tom?—Of course, you _______A．Can; could B．Could; canC．Could; couldD．Can
• Susan’s parents have bought a large house with a swimming-pool. It ____ be very expensive.A．mustB．ca
• 如图表示生产，消费者，分解者之间的关系，请据图回答问题（1）图中的生产者是______；（2）图中的消费者是______；（3）图中的分解者是______；（4）图中共有食物链______条．图中的-
• 单项选择。There _____ two pencils on the desk. [ ]A. are B. be C. isD. am -七年级英语
• —Do I have to come back tomorrow?—Yes, you _____. [ ]A. can B. may C. must D. should -九年级英语
• Where _____ Lily and Lucy from?[ ]A. is B. are C. do D. does-七年级英语
• You drink wine before driving, or the police will take your license away.A．don’t have toB．needn’tC．m
• ---I was told to be here at this time.---Sorry, you ___________. I forgot to tell you we've cha
• ---- Is Ann knocking at the door?--- No, it ______ be Ann. She has gone to Beijing. A．can’tB．mustn’t
• 地球上生物生命活动所需的能量几乎都是由植物光合作用提供的，因此可以说，地球上生物所需能量的最终来源都是（）A．化学能B．太阳能C．地热能D．植物能-生物
• 如图为某生态系统中的部分生物，请据图回答下列问题：（1）在这个生态系统中，非生物成分包括______．（2）在这个生态系统中，生物成分包括______．（3）这个生态系统中的起点生物是_-生物
• --Whose T-shirt is this? --Itbe John’s. It’s much too small for him.A．mayB．mustC．can’tD．shouldn’t-九年
• There_______greatchangesinourhometownoverthetwentyyears. [ ]A.havetakenplace B.havehadC.havebeen D.w
• ---Could I borrow your dictionary?---Of course you ________.A．couldB．canC．must D．should-八年级英语
• 如图为生物圈中物质循环局部示意图，请回答：（1）在生态系统中，物质是循环的．能把二氧化碳和水这些无机物造成有机物的是______．（2）能把有机物再转变成二氧化碳和水等返回无机-生物
• 用所给词的正确形式填空。1. English is very (importance) for us.2. Don't be (anger)with me, Dad. I won'
• —Is that Lucy’s cousin, Anna?—No, it ______ her. She has gone to Paris.A．mustn’t be B．might be C．can
• Your idea（想法） very good.[ ]A. sounds B. sees C. hearsD. listens-七年级英语
• 生态系统中的能量流动开始于（）A．绿色植物B．真菌C．动物D．人-生物
• 生物圈的生物丰富多彩，请你把下列生物与所在生物圈中的作用线连起来．生产者①柳树②蝗虫消费者③小麦④金丝猴分解者⑤炭疽杆菌⑥乳酸菌．-生物
• 地球上所有生物生命活动的能量来源是______．在生态系统中，能量沿着食物链依次流动过程中表现出来的特点是______．-生物
• 选择填空。 Sally went to the library yesterday. She said it ______ just so.[ ]A．was B．is C．were -七年级英语
• — Must I answer this question in English?— No, you_________.A．mustn’tB．needn’tC．can’tD．shouldn’t-九年级
• I can play tennis，but my sister ________．[ ]A．don’tB．can’tC．doesn’t D．isn’t-七年级英语
• — Must we go to see a doctor at once? — No, you ___. [ ]A. can't B. mustn't C. needn'
• My teacher's voice _____sweet,We all like her songs.[ ]A. feelsB. smellsC. looks D. sounds-八年级英
• —Must we clean the classroom now?—No ,you _______.A．mustB．needn’tC．aren’tD．mustn’t-九年级英语
• 如图为生态系统的物质循环图，请据图回答：（1）在生态系统中，植物是______，动物是______，细菌、真菌是______．（2）箭头1所示的过程是：动物直接或间接地以植物为食，通过呼吸作-生物
• 如图为某校园生态系统组成成分的示意图，图中的乙属于（）A．生产者B．消费者C．分解者D．无机环境-生物
• 据如图回答下列问题：（1）图中阳光、水、空气、无机盐等组成了生态系统中的______，绿色植物、细菌、真菌和其他四种动物组成了生态系统中的______．（2）图中一共有______条食物链-生物
• There _______ a bank , two supermarkets and a park in the neighborhood. A．hasB．haveC．isD．are-八年级英语
• ---Look, Sue is over there. --- That ____ be her. She is in Canada now.A．mustn’ tB．can’tC．needn’tD．w
• —Mum, must I wash the dishes right now?—No, you ____.[ ]A. shouldn’tB. wouldn’tC. mustn’tD. needn’t-
• Uncle John is getting old and he has trouble ______ what others say to him. A. hearing B. hear C. to
• We are going to the beach for vacation. That______good.[ ]A.feels B.Looks C.sounds D.smells-八年级英语
• He ___ in 1997.[ ]A. boreB. bearC. was bornD. born-八年级英语
• 大多数细菌和真菌在生物圈中属于（）A．生产者B．消费者C．分解者D．寄生者-生物
• Tina gets up late, so she _____ go to school by taxi.A．cansB．would likeC．has to D．shoulds-八年级英语
• _______ there any interesting news in today's newspaper?[ ]A. AreB. Is C. HaveD. Has -七年级英语
• 食物链中，愈向食物链的后端，储存的能量愈多．______．-生物
• It’s nothing serious. You’ve just caught. a cold. A．a bitB．a bit ofC．a littleD．a little of-九年级英语
• ─ Where ______ I put the newspaper? ─ You can put it on the desk. [ ]A. can B. must C. do D. does -七
• 森林是人类的朋友．下图是科学工作者对某森林生态系统中不同层次的植物及土壤生物固定太阳能的调查结果．请回答下列问题：（1）图中显示乔木层固定的太阳能______（填“等于”或“大于-生物
• This kind of apple _delicious.[ ]A. soundsB. tastesC. looks D. seems-九年级英语
• -- Must I come here at eight o’clock?-No, you ____. You may come a little later.A．mustn’tB．needn’tC