“落红不是无情物，化作春泥更护花”的诗句反映了（）A．生态系统中能量流动的单向性和不可逆性B．生态系统中的物质循环C．生物与环境相互依存、相互制约的关系D．生态系统中生物与食-生物

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• Today is Wednesday. He _______ be at home. He _____ be at school.A．can’t, canB．can’t, mustC．mustn’t,
• 属于消费者和生产者关系的是（）A．青蛙捕食昆虫B．黄鼠狼吃鸡C．长颈鹿吃树叶D．松鼠吃蘑菇-生物
• Lucy’s colour ____ blue because she likes to be the leader, so it ____ red.A．can’t be; must be B．can
• 按要求改写句子。1. The Green Family are staying in Qingdao for five years.(就划线部分提问) _________ _________ ____
• —"Katrina is a famous singer." —"I think so, And her voice _________ very sweet (甜美的)
• —Let's play soccer after school. —That ______ great! [ ]A. sounds B. looks C. hears D. listens
• 小薇买来的香蕉放了几天后，开始慢慢长出“黑斑”，出现了腐烂的现象，这与生态系统中的什么成分有关（）A．生产者B．分解者C．消费者D．都不是-生物
• --Must I come at four o’clock? -- Oh, no, you ______.A. can’t B. mustn’t C. needn’t.-八年级英语
• If you ______tired，you’d better have a rest.[ ]A. be B. isC. areD. may-八年级英语
• 从老鹰吃蛇，蛇吃青蛙，青蛙吃昆虫，昆虫吃植物，可以看出，老鹰体内的有机物最终来源于（）A．光B．植物C．蛇D．昆虫-生物
• 请完成下列图解．（1）上图表示一个生态系统，其组成成分中生物部分缺少了______（2）生产者与消费者之间的关系，主要是______的关系，这样就形成了食物链．该生态系统中有______条-生物
• 下列生物属于生产者的是（）A．柳树B．羊C．细菌D．猪-生物
• —Nice to meet you , Mike.________?—Everything is OK. Thanks.A What are you doing B Where have you be
• —Well, let's go to visit the Ren'ai Park this Saturday. —That _______ great. [ ]A. feels B
• —I hit a tree on the way to meet my friend at the railway station. —I am sure that youhave been driv
• 下列能构成生态系统的是（）A．生物圈及生物圈内的生物B．一个湖泊中的所有生物C．地球上的所有人类D．长白山森林中的所有树木-生物
• 下列各组生物，全部属于生产者的一组是（）A．病毒、紫菜、地衣B．苹果树、松树、小麦C．蘑菇、白菜、水稻D．啄木鸟、松树、杨树-生物
• 如图是生态系统的组成示意图，请据图用图中序号回答问题：（1）生态系统中的生物部分包括生产者、消费者和分解者，请指出图中生产者是______，消费者是______和______，分解者是-生物
• —KoreansingerJangNara______Chinaforyears.—Lastweek,shealso______herwishtolearncrosstalk(相声).[ ]A.has
• Today is Wednesday. He _______be at home. He ______ be at school.A．can’t, canB．can’t, mustC．mustn’t,
• His father and mother ____ teachers.[ ]A. are all B. are both C. both are D. all are -七年级英语
• — How _____ your vacation, Lucy? — It was pretty good. [ ]A. did B. were C. do D. was -八年级英语
• —These roses _______ lovely. —I want to send them to my teacher on Teachers' Day. [ ]A. look B.
• 在生态系统中，属于分解者的是（）①河中的鱼②树桩上的蘑菇③淡水中的草履虫④土中的细菌⑤高山上的油松⑥草丛中的蝗虫．A．③⑤B．①②C．④⑥D．②④-生物
• She doesn’t ______ a new dictionary because she bought _____ a week ago.A．need to buy, oneB．need buy
• —Is that man Mr Hu?—That ______ be Mr Hu. Because he has gone to Japan with his wife.A．couldB．can’tC
• The lunch in our school _____ good. [ ]A. areB. isC. am -七年级英语
• Lucy’s colour ________blue because she likes to be the leader, so it __________red.A．can’t be, must
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• Weknowyou'reacleverman,andyourplan______verygood. [ ]A.seesB.soundsC.hearsD.looks -七年级英语
• Have you heard of the story? It ____ funny and interesting. [ ]A. looks B. tastes C. smells D. sound
• It is in the library, you ______ talk loudly. [ ]A. may notB. can'tC. needn'tD. mustn'
• Where _____ your P.E. teacher from? [ ]A. doesB. is C. do -七年级英语
• 校园中的柳树属于（）A．分解者B．生产者C．消费者D．非生物部分-生物
• 右图是生态系统4种组成成分的关系图解，图中的B是二氧化碳．请据图回答：（1）本生态系统中的能量流动是从A______固定太阳能开始的．（2）此系统中连接生物界与无机环境的是______．-生物
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