—Two months ______ quite a long time.—Yes, I'm afraid that he will miss a lot of his lessons. [

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• 在生态系统中，从总体上看各组成成分储存的能量，排序正确的是（）A．植物的数量＞草食动物＞肉食动物B．草食动物＞肉食动物＞植物的数量C．肉食动物＞草食动物＞植物的数量D．肉食动物＞-生物
• 单项选择。—Whatthe score yesterday? — It 80:82. [ ]A. was, was B. is, is C. are, are D. were, were -七年级英语
• 下列四种微生物：大肠杆菌、蓝藻、枯草杆菌、根瘤菌，其中，属于生产者的是______；属于消费者的是______；属于分解者的是______；具有固氮作用的是______．-生物
• —Let’s go dancing tonight.!—Sorry, I ________.I have to go to my guitar lesson. A. mustn’t B. needn’
• — Susan, would you like to go hiking with us this afternoon?— I'd love to, but Istudy for a tes
• 如图中A表示的是一种鹰在一个群落中的情况，那么B代表的可能是（）A．是该种鹰的天敌种群B．是与鹰有互利共生关系的一个种群C．群落中生产者数量变化的情况D．是被鹰捕食的一个种群-生物
• They _____ here for more than a month. [ ]A. have arrived B. have reached C. have come D. have been
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• We can make a fire ______ the room warm so that we can chat for a while.A．to keepB．keepingC．keepD．ke
• 生态系统中，生产者主要是______，消费者是指______．-生物
• —Don’t forget ______ your homework. John. —Ok. I'll do it right now.A. doing B. do C. to do -九年
• 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
• 属于自然界“生产者”，进行光合作用生产有机物，释放氧气的是（）A．水稻B．农民C．传播花粉的蜜蜂D．用于生产酸奶的乳酸菌-生物
• 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
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• — 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
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• Almost all the water ____ gone. Please save water! [ ]A. areB. is C. have D. were -九年级英语
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• 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
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• 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
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• 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