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

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• 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
• The tour guide has made the route for the school trip. We don’t need to __ that. A. be worried about
• 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
• He went into his room,the light and began to work.A．has turned onB．turned offC．turned onD．has turned
• —Would you like _______ or shall we go by bus?— I prefer _______,but we have to take a taxi, for tim
• 在生态系统中既属于生产者，又属于消费者和分解者的是（）A．植物B．动物C．微生物D．细菌-生物
• 生态系统具有一定的稳定性，下列关于生态系统的描述中，错误的是（）A．生态系统包括生物部分和非生物部分B．生态系统的营养结构是食物链和食物网C．太阳是食物链的组成部分D．生态-生物
• Both you and Igood teachers. [ ]A. are B. is C. amD. was -九年级英语
• 在自然界，生物之间的信息交流是普遍存在的．正是由于______、______、______的存在，使生物之间的联系错综复杂，生物与环境才成为统一的整体．-生物
• 自然界中的虎、豹等大型肉食动物，在种类和数量上均比其他动物少得多，造成这种现象的主要原因是（）A．大型肉食动物繁殖能力低B．它们在食物链中所处的营养级较高C．这些动物被人-生物
• --What do you think of the book you borrowed from the library yesterday?--I have no idea. I_________
• ––Are you _______ “Planting online vegetables”? ––No, I think it’s a waste of time. A．major in B．afr
• People who drink wine ______ to drive after May Day. A．don’t allowB．isn’t allowedC．mustn’t allowD．mu
• 一个生态系统，无论大小都是由（）A．生产者，消费者，分解者组成B．植物，动物，细菌，真菌组成C．生物部分和非生物部分组成D．阳光，空气，水组成-生物
• 如图为某生态系中部分食物网图．请回答：（1）图中绿色植物进行光合作用的场所是细胞中的______，绿色植物是生态系统中的______者；（2）在该生态系统中含能量最多的生物类群是___-生物
• 如图为三个处于不同环境的生态瓶（将A，B瓶置于有光条件下，C瓶用不透光的盒子罩住）．请分析回答下列问题：（1）探究“光对生态系统的稳定性是否有影响”这个问题，应选择______瓶与-生物
• —Steve is good at writing short stories. — So he is. But he writes _______ than us. So he can’t get
• Do you know any singers who ____ good at writing their own songs? [ ]A. is B. does C. are D. do -九年级
• —Hey! Don’t you remember me?—Wow! Mary? You _______ curly hair. But now you have straight hair.A. us
• 蘑菇在生态系统中属于（）A．消费者B．分解者C．生产者D．制造者-生物
• 如图是某生态环境的示意图，请据图回答下列问题：（1）此生态系统中生物所需的能量根本来源是______．（2）在此生态系统中最基本、最关键的生物组成成分是______．（3）图中所示的细菌-生物
• The light is on in Mr. Green’s room. He _______ be at home.A．mustB．canC．mustn’tD．can’t-九年级英语
• －Mike, I can’t stop playing computer games.－For your eyes, I am afraid you ______.A．have toB．mayC．wo
• 生态系统中生产者、消费者、分解者之间的关系是（）A．生产者依赖于消费者、消费者依赖于分解者B．消费者很依赖生产者、生产者依赖于分解者C．分解者依赖于生产者和消费者，消费者-生物