下图示我国南方的一种新型的“桑→蚕→气→鱼”农业模式，该模式将蚕沙（蚕粪）、人畜粪便、枯枝败叶等投入沼气池发酵制成沼气，用沼渣喂鱼及为桑树施肥，获得了鱼、蚕、桑、气的全-八年级生物

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• 请你参照右图制作一个生态瓶，探究生物在一个密闭的生态系统中如何生存．制作方法是：将小鱼2条、小田螺4只和一定数量的水草一起放入盛有水的密封的广口瓶中．瓶底应放置一些沙-生物
• He is ______ outstanding student from ______ university in America. A．a; aB．a; anC．an; aD．an; an-八年级
• When he ________young, he________ a good kid.[ ]A. is; isB. was; wasC. is; wasD. was; is-七年级英语
• She _____ of medium height with short hair.[ ]A. is B. has C. does-七年级英语
• He asked me if I ______ mad ______ him. [ ]A. am; at B. was; at C. was; to D. am; to -八年级英语
• The yellow coat ________belong to Linda because nobody likes yellow except her. A．can’tB．mayC．mustD．
• I ______ it everywhere, but I didn’t _____ it. A．looked for, looked forB．looked for, find C．found, l
• Tina_________wait _________ see her parents .A．can; forB．can’t; forC．can; toD．can’t; to-九年级英语
• 海带是人们经常食用的植物，它属于（）A．藻类植物B．苔藓植物C．蕨类植物D．裸子植物-生物
• ____________和____________是生态系统的重要功能。生态系统要完成这些功能是沿着________和________进行的。-八年级生物
• 下列是草原生态系统的食物网示意图，请据图回答：（1）该生态系统的生产者是______，直接以植物为食的消费者是______，没有表示出来的成分是______．（2）该食物网有______条食物链-生物
• You didn’t have breakfast. You ________ be hungry now.A．mustB．can’tC．couldD．might-九年级英语
• It _________ rain this afternoon, but I am not sure.A．willB．canC．mustD．may-九年级英语
• Frank is my pen pal, he _____________ Sydney, Australia.A．livesB．fromC．comes fromD．be from-八年级英语
• Listen to the music. It _______ interesting. [ ]A. sound B. listen C. sounds D. listens -七年级英语
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• My teacher ______ a little bit heavy.[ ]A. isB. has C. there is-七年级英语
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• Tigers like to eat _____________, but koalas like to eat____________.A．meat , leaf B．meats , leafC．m
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• Oneandtwo______three.[ ]A.makeB.areC. isD.be-七年级英语
• When the traffic lights are red, we _______ stop.A．should B．might C．must D．may-八年级英语
• You’d better _______ too much meat. You are much too fat. A. not eat B .eat C. not to eat-八年级英语
• Our English teacher said she _______ speak three languages． A．couldB．canC．willD．is going to-八年级英语
• —How many teachers are there in your school? —About 160. One third of themmen teachers. [ ]A. have B
• 用所给词的适当形式填空1.--Where______ (be) New York?--It's in the USA.2._____your pen pal______(come) from
• —You____veryhappythisafternoon.Why? —BecausewearegoingtospendtheeveningatLily'shouse. [ ]A.tast
• 在草原生态系统中，鸟飞蝶舞，牛羊成群，草丛中还偶尔长有蘑菇，在这些生物中，一定不参与构成食物链的是（）A．鸟，蝶B．牛、羊C．蘑菇D．草-生物
• 用be的适当形式填空。①I____ astudent.②What____thatinEnglish?③Thekey____white.④How____you?-七年级英语
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• --- Must I finish the project now?--- No, you _. You_do it this evening.A．mustn’t; canB．needn’t; may
• 下图为一个水域生态系统的示意图，请据图回答问题：（1）藻类是生态系统中的，大鱼和小鱼是生态系统中的。（2）大鱼与小鱼之间是的关系。（3）和能量流动是生态系统的重要功能。在生-八年级生物
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• ---Who is the tallest boy? ---It ______ be John. John is of medium height.A．mustB．needn’tC．mightD．ca
• I _______ find my English book. Where is it? [ ]A. canB. am C. can't -七年级英语
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• It _____ that Yu Mei has changed a lot. [ ]A. seem B. seems C. look D seemed-八年级英语
• A ruler and a pen ________ in the Lost and Found. [ ]A. is B. are C. has D. have -七年级英语