生态系统的组成包括______和______，其中生物部分包括______、______和______；非生物部分如：______、______、______等．-生物

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• Youeat the soup if you don't like it.A．shouldn't B．mustn't C．needn't D．can'
• 如图是某校生物兴趣小组对农田生态系统做过调查后，绘制的食物网简图．请据图回答有关问题：（1）在生态系统的组成成分中，植物属于______．（2）在农田生态系统中，鼠与昆虫之间是-生物
• 下列生物属于生态系统分解者的是（）A．蝗虫B．蘑菇C．蚊子D．葫芦藓-生物
• —When ______ you born, David? —I ______ born in 1995. [ ]A. was; were B. were; was C. were; were D.
• We'd better waitmore minutes. I think Jeff will come soon,A．a few B．few C．a little D．little-九年级
• If you have finished most of the work, you ______ start working so early tomorrow.A．can’tB．mustn’tC．
• 用括号内所给动词的适当形式填空。 1. — Listen, who ________ (read) in the classroom?— Maybe Kate ________ (be). 2. Am
• 下列某生态系统的组成成分中，属于消费者的是（）A．阳光B．野兔C．牧草D．细菌-生物
• 在菜园里，蚯蚓昼伏夜出，以凋落的黄叶、腐败有机物为食，排出的粪便中含有丰富的氮、磷、钾等无机盐．蚯蚓在土壤中活动，可以以疏松土壤，改善土壤结构．（1）蚯蚓在此生态体统-生物
• 下列关于生态系统的叙述，错误的是（）A．生态系统无论大小，都是由生物部分和非生物部分组成的B．一个生态系统中，往往有很多条食物链，它们彼此交错连接，形成食物网C．动物和植-生物
• —Congratulations! Among the best pictures in the competition，I found _______. Why did you draw it?一D
• — Have you decided where to spend your summer holiday? — Not yet. We _____ go to Qingdao. [ ]A. must
• There a teacher and three boys over there. [ ]A. be B. is C. am D. are -七年级英语
• 1935年澳大利亚为控制甘蔗害虫而引入的有毒蔗蟾如今已成为新的生物灾难．面对泛滥蔗蟾，科学家打算利用与蔗蟾活动时间不同的食肉蚁来控制蔗蟾数量．下列有关叙述不正确的是（）A-生物
• Every year many babies ______ born. [ ]A. is B. are C. was D. were -八年级英语
• Tom, along with three other boys, seen playing football a moment ago.A．isB．wasC．areD．were-九年级英语
• 下面是温带草原生态系统示意图，请认真观察下图后分析并回答下列问题：（1）该生态系统中，各种生物进行生命活动所需能量的根本来源是______．（2）从组成生态系统的成分看，图中未-生物
• Physics ______ much harder than English, I think. [ ]A. are B. is C. wasD. were -七年级英语
• 梨树、阳光、蜜蜂分别属于生态系统中的哪种成分？它们在生态系统中的作用分别是什么？请你通过连线来表示．生产者梨树通过光合作用制造有机物消费者阳光促进物质循环和帮助植物-生物
• —May I smoke here，please?—I am afraid you ．This is a non-smoking area．A．canB．can’tC．mayD．may not-九年级
• 一Excuse me, is this the right way to No. 1 Middle School? 一Sorry, I'm not sure. But it_______ b
• -- Can I tell Peter about the news?-- No, I don’t want anyone else to know it. You ________ keep it
• —Must I five the dictionary back to the library now?— No, You _____. You can _____ it for another tw
• 如图是一个生态系统示意图．据图分析回答：（1）从生态系统组成成分看，图中的光、空气、水、无机盐属于______．（2）此生态系统的生产者是______，最高级的消费者是______．（3）图中-生物
• Look! We can’t cross the bridge. It by some workers.A．repairsB．is repairedC．is being repairedD．is re
• —Look at the sign! —Oh, I see.We _______ waste water.A．canB．mustC．mustn’tD．needn’t-九年级英语
• 鹤地水库是湛江最大的淡水生态系统，下列有关生态系统的叙述正确的是（）A．水库中的大头鱼是生产者B．能量在食物链中的传递是逐级递减的C．水中植物不能合成有机物D．“大鱼吃小鱼-生物
• ______ there a pear on the table? No, there ______ some bananas on it. [ ]A. Are; are B. Is; is C. A
• 用所给词的适当形式填空。1. Could you please ________ (take) these things to my room? 2. Do you mind my ________
• —Can you come to have dinner with me this evening? —I'm afraid not. I_____ take care of mygrand
• --Listen! Is it Linda singing in the next room? --No, it __________ be her. She is still in Shanghai
• Tony used to to school, but he is used to to school now.A. walk; taking a bus B. walked; took a bus
• Tom’s mother is busy _____ breakfast for Tom.A．cookB．to cookC．cooksD．cooking-九年级英语
• 请据图回答下列问题：（1）图中的绿色植物利用太阳的光能，制造______，不仅养活了自己，还养活了虫和鸟，所以它是生态系统中的______者．（2）图中的虫和鸟是生态系统中的______，-生物
• George's records _______ very successful after the Beatles. [ ]A. was B. were C. are D. is -七年级
• —Must we finish the homework before six?—No ,you ____. You may do it tomorrow. [ ]A. mustn’tB. may n
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• Drivers shouldn’t be allowed _______ after drinking, or they will break the law. A. drive B. driving
• —Dowehavetofinishourhomeworktonight?—Yes, you______. [ ]A.mustB.canC.mayD.need -九年级英语
• — _____ you tired? — Yes, I _____. [ ]A. Do; do B. Did; do C. Are; am -八年级英语
• 假设某生态系统中有甲、乙、丙三种生物，他们的捕食关系如右图所示．那么该系统中属于生产者的是（）A．甲B．乙C．丙D．乙和丙-生物
• 在生态系统中，物质是循环的．生产者能把二氧化碳和水这些无机物制造成有机物，下列（）能把有机物再转变成二氧化碳和水等返回无机环境中．A．生产者B．消费者C．分解者D．以上都是-生物
• The talented boy _________ write lyrics when he was at the age of ten. A. may B. could C. must-九年级英语
• At last the boy was made and began to laugh.A．stop cryingB．to to stop to cryC．to stop cryingD．stop t
• Mr Johnson _______ a child at the start of the 1950s. [ ]A. is B. are C. was D. were -七年级英语
• 在生态系统的各种成分中，______能够把复杂的有机物分解成______归还到环境中被植物等生物再利用．-生物
• — How was the youth club last night, Mark? — It was great fun. You ______ come. [ ]A. must B. can C.
• 据观察，蚯蚓在土壤中以植物枯叶、朽根为食，你认为它在生态系统中应属于（）A．生产者B．分解者C．消费者D．生产者兼消费者-生物
• — What are you looking for, Michelle?— My cousin's MP3 player. It ______ right in here, and now