在自然界的物质循环中，对物质转化不可缺少的是（）A．生产者和消费者B．消费者和分解者C．分解者D．消费者-生物

更多内容推荐

• 非生物因素包括______、______、______、______、______、______等多种因素．-生物
• —______ did you sleep last night?—Only five hours. I stayed up late to do my homework.A．How soonB．Ho
• —I am happy that Ito be the host. —Congratulations! [ ]A. choose B. are chosen C. was chosen D. have
• 请你根据如图示回答问题：（1）图中的绿色植物利用太阳光能，制造______，不仅养活了自身，还养活了虫和鸟，所以它是生态系统中的______．图中的虫和鸟是生态系统中的消费者，随-生物
• 如图所示是某生态系统的食物网，请根据图和所学知识回答下列问题．（1）图中的绿色植物利用太阳能，制造有机物，不仅养活了自己，还养活了图中的其它生物，所以它是生态系统中的-生物
• 下列能将复杂的有机物分解为简单物质的是（）A．海藻B．鹰C．蘑菇D．蝴蝶-生物
• —Who will pick you up after the long journey by plane?— Don't worry, my host family ______ me a
• This dictionary______ Tom's. It has Ann's name on itA. might be B. may he C. can't be
• 环境中______的因素，叫生态因素．生态因素包括______和______两类．对于生活在池塘水底同一处的两种水草来说，它们的______因素相同，______因素不同．-生物
• —I won’t go to the concert this evening. I ______ watch the NBA on TV. It’s more exciting.A．had bett
• My aunt ______ here for about a week. [ ]A. has got B. has beenC. has arrived D. has reached -九年级英语
• 农田生态系统中的生产者主要是（）A．农民B．耕牛C．农作物D．杂草-生物
• Li Ming is a new student in our class. He ______ here for only a month. [ ]A. has come B. has been C
• 在下列食物链中的哪个环节，可以发现含有最多的能量？（）藻类→水蚤→鲱鱼→人类．A．藻类B．水蚤C．鲱鱼D．人类-生物
• — The book very interesting. Tell me more about it.— OK. A．areB．isC．amD．be-九年级英语
• Tom and Imembers of Music Club.[ ]A. am B. is C. are D. ／ -七年级英语
• —Can you come to my party on Wednesday?—Sorry, I can't. I___ finish my homework.A. may B. would
• — _ I use your eraser, Rose?— Sure. Here you are.A．MayB．WouldC．NeedD．Must-九年级英语
• —How long may I keep the book?—You ________ keep it for two weeks. A. may B. must C. will-九年级英语
• 微生物在生物圈中有着重要的作用，它在生物圈中可以充当（）A．生产者B．消费者C．分解者D．以上三项都对-生物
• Almost all the water ____ gone. Please save water! [ ]A. areB. is C. have D. were -九年级英语
• Where is Frank now? He _______ in the reading room. [ ]A．read B．reading C．reads D．is reading -七年级英语
• 如图是某草原生态系统中部分生物之间关系的示意图，请据图回答：（1）图中兔、鼠、猫头鹰等动物属于______者．（2）图中数量最少的生物是______．（3）若在草上喷洒农药，则最后_____-生物
• — Will you stay for lunch?— Sorry, I ______. My brother is coming to see me.A．needn’tB．can’tC．should
• 在农田中，对田鼠有直接影响的生物因素是（）①青蛙②蚯蚓③黏虫④蛇⑤甘薯⑥猫头鹰．A．①②③B．①④⑤C．②⑤⑥D．④⑤⑥-生物
• _____ late again! The teacher is in the classroom. [ ]A. Not B. Don't C. Not be D. Don't b
• —you Jim Green? —No, My nameSam Green. [ ]A. Are, is B. is, is C. Do, is D. Does, is -七年级英语
• —Will you stay for some more days? —Sorry, I_____. My mother called to ask me to go back at once. A．
• There are a lot _____ students on the playground. A. of B. in C. by-九年级英语
• 很早以前，我国劳动人民就学会了用桑叶喂蚕、蚕沙（蚕粪）养鱼、塘泥肥桑的方法，创造“桑基鱼塘”生态农业．随着科学技术的进步，“桑基鱼塘”也得到了不断的发展，人们改变蚕沙直-生物
• The dumpling and soup lunch 10 RMB. [ ]A. is B. hasC. are D. have -七年级英语
• There ______ little water in the river.A．beB．amC．isD．are-九年级英语
• 生物与环境相互影响、相互作用，构成了______．-生物
• 若某个草原生态系统中的甲乙丙丁四种生物构成一条食物链，在某一时间（生态系统处于生态平衡）分别测得某种群数量如右图所示．（1）在四种生物中，最有可能是生产者的是______；这-生物
• In the past five years, Jim _______ France three times. [ ]A. went B. has gone to C. has been to -九年
• Complete sentences with "is, are, was, were". 1. We told to be ready at ten o'clock.
• The population of my hometown200.[ ]A. is B. are C. am D. do-七年级英语
• 用所给词的适当形式填空。1. ________ (be) his friends here today? 2. She is friendly (友好的) and ________ (help). 3
• ----Dad, the bread is not enough. I am still hungry.I have something more? ----But there’s nothing i
• _Can you write a letter in English? _No, I______.I know only a little English.A．can’tB．needn’tC．may
• 动物在自然界中扮演的角色是（）A．生产者B．消费者C．分解者D．破坏者-生物
• 下图为一个池塘的生态系统，池塘内有水草、浮萍、水绵、鱼、虾等生物．（1）在此生态系统中，生产者是______（3种），消费者是______（2种）．在该生态系统中，没有画出的生物成分是-生物
• They _______ friends since they met in Shanghai. [ ]A．had got B．have became C．have been D．have turne
• Movie programs often CCTV-6. [ ]A. is; in B. are; into C. is; at D. are; on -九年级英语
• We sure he is innocent (无辜的). [ ]A. are; that B. be; / C. /; for D. are; what -八年级英语
• —Where have you , Tim?— I've been to Mount Huang. [ ]A. gone B. been C. been to -九年级英语
• — _______ Amy late for school? —Never. [ ]A. How long is B. How often does  C. How many times does
• 下面的说法，正确的是（）A．蘑菇是植物，属于生产者B．有机物的最终来源是光合作用C．生产者、消费者、分解者构成生态系统D．水稻在灌浆期如果连日阴雨，就会减产，是水分因素的影-生物
• ________did Gina say when you told her about the game?A．HowB．WhatC．WhichD．Why-九年级英语
• A student in my class said to me, " If I our math teacher, Imake math learningeasier and more i