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

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• 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
• 在生态系统中作为生产者，可以通过光合作用制造有机物的是（）A．动物B．植物C．非生物部分D．细菌、真菌等微生物-生物
• 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
• The red bike be Hu’s. Hers is blue.A．mustB．mightC．canD．can’t-九年级英语
• 在生态系统中，生产者和消费者所代表的生物分别是（）A．动物与动物B．植物与植物C．动物与植物D．植物与动物-生物
• _____ her hat on the dresser? [ ]A. Is B. Are C. Can D. Do -七年级英语
• You’d better ________ right after supper.A．don’t runB．not runC．not to runD．to run not-九年级英语
• The cloth _____ soft. [ ]A. is feel B. fell C. feels D. felt -九年级英语
• —Howdoyoulikethispieceofmusic? —It______good. [ ]A.looksB. soundsC. lisetensD. feels -八年级英语
• 在广阔的草原生态系统中，数量最多的是（）A．草本植物B．野鼠C．牛羊D．狼-生物
• 在某个特殊环境中可以缺少的成分是（）A．生产者B．消费者C．分解者D．非生物部分-生物
• Hello, I ________ Jim.[ ]A. am B. is C. are D. be -七年级英语
• The boy ______ glasses is my classmate. He ______ of medium build.[ ]A. has, is B. with, has C. with
• Whatyou do if you won in the lottery?A．shallB．wouldC．willD．are-九年级英语
• He would rather ________for himself than________for a meal.A．cook；going outB．to cook；go outC．cook；go
• 下列各项中，是生产者和消费者关系的是（）A．鲢鱼以浮游藻类为食B．山羊喝水C．蛇捕食青蛙D．老鹰抓兔子-生物
• Her books _____ under the chair. [ ]A. / B. areC. is D. an -七年级英语
• —What do you think of the music, Maria?—It _____ wonderful. [ ]A. feels B. sounds C. looks -八年级英语
• —Excuse me, Mr. Li. _______ I close the window? It’s cold now.—Yes, you _______.[ ]A. Can; may B. Ma
• 在生态系统中，细菌和真菌的角色是______．-生物
• --- Do you have _________ paper, Millie ? I want to write a letter.--- Sorry, I don’t have.A．any; so
• -Can I watch TV now? -No, you ________. You ________ do your homework first. A．can; mustB．can’t; mus
• — What _____ your teacher _____? — She is friendly. [ ]A. does, like B. is, like C. are, like D. do,
• Don't _____ late, please. [ ]A. are B. be C. is D. are -七年级英语
• 用am, is, are 填空。1. —What ____ your name?—My name ____ Dave. 2. —____ you Lingling? —Yes, I ____. 3.
• 下列说法错误的是（）A．非生物因素为生命的存在提供了物质基础B．绿色植物是生产者，为动物的生存提供了有机物．没有生产者，其他生物就失去了生存的基础C．消费者不能制造有机物-生物
• 下列叙述错误的是（）A．进入生态系统的能量是照射在植物上的太阳能B．能量在食物链的流动过程中逐步被消耗减少C．生态系统中的物质是可以反复循环利用的D．生态系统的调节能力是有-生物
• 句型转换。1. We can wear hats in school. (变成否定句) _____________________________2. We can eat in the cafet
• 把鱼肠埋入土壤中，过一段时间后发现不见了，原来是被某些细菌、真菌分解了，细菌、真菌在生态系统中属于（）A．生产者B．消费者C．分解者D．非生物成分-生物
• There _____ a pen and two pencils in the pencil-box.[ ]A. is B. are C. be D. am -七年级英语
• If you have difficulty_______a decision，wearing red_______it easier for you to take action．A．make；ma
• ______green or_______in a light green room________good for us．A．Wear；sleep；isB．Wearing；sleeping；are
• 生态系统中的能量流动伴随着物质循环，下图为生态系统碳循环示意图。下列各项中叙述不正确的是[]A．①表示动物体内能量流向植物B．③表示植物的光合作用C．④表示动物的呼吸作用D．-八年级生物
• _____ you happy at school? [ ]A. Be B. Do C. Are D. Is -七年级英语
• 地球上有各种各样的生态系统，这些各种类型的生态系统组成的共同点是（）A．有生物成分和非生物成分B．有生产者、消费者C．有生产者、分解者D．有分解者、消费者-生物