在农田生态系统中，青蛙属于该系统中的（）A．生产者B．分解者C．消费者D．以上都不是-生物

更多内容推荐

• —Where____my computer games?—They are____the drawer.[ ]A. are; on B. are; in C. is; in D. ／；on-七年级英语
• —Mum, my friends are waiting for me outside. May I go out to play with them?—Yes, you, but be carefu
• 用情态动词 could, can, may, must, need 的正确形式填空。1. —_______you answer this question in —Sorry, I_______.__
• —How much _____ the blue pants? —_____ $20. [ ]A. is; It's B. are; These are C. are; They'
• A book and a pen________on the desk.[ ]A. isB. are C. doesD. do-七年级英语
• — Are you going to Beijing by air?— It’s fast, but expensive. So I’m not sure. I _____ take a train
• --- I hope Jim won’t mind lending you his new digital camera. --- He ___________. I have already bor
• “一山难容二虎”这一谚语，用生物学观点可以理解为（）A．身体强壮的虎以身体弱小的虎为食B．虎所需的生活空间很大C．虎性情孤独，不群居D．虎所处的营养级高，获得的能量少，个体数-生物
• 砍伐后的树桩经过一段时间后，会生长地衣、蘑菇、蚂蚁及各种微生物等，其中的蘑菇属（）A．生产者B．消费者C．分解者D．非生物物质-生物
• 陆地生态系统不包括（）A．森林B．草原C．荒漠D．湖泊-生物
• 生态系统中能参与物质循环的有（）A．生产者和分解者B．生产和消费者C．消费者和分解者D．生产者、消费者和分解者-生物
• Thereadingroom____veryquiet.Ienjoyreadingbooksthere.[ ]A.amB.isC.areD.be-九年级英语
• A bed and a computer_____in my bedroom.[ ]A. areB. isC. hasD. have-七年级英语
• 单项选择。—May I go to a restaurant for lunch?— Yes, you ____. [ ]A. do B. are C. may D. may to go -七年级英语
• 如图是东昌湖内某些生物间的相对数量关系，这些生物构成了一条食物链。你认为该食物链中物质和能量的流动方向是[]A．甲→乙→丙→丁B．丁→丙→乙→甲C．丙→丁→乙→甲D．甲→乙→丁→丙-八年级生物
• If you don't go to Lisa's party, you'll. [ ]A. sorryB. be sorryC. is sorryD. is afrai
• How much_____ the pen? [ ]A. are B. does C. is D. does-七年级英语
• Everyone ______ be polite to the old people.A．mayB．shouldC．canD．could-八年级英语
• 蘑菇是生态系统中的生产者．______．-生物
• 用所给的词的适当形式填空1. How much _____ (be) the blue socks? 2. Can you help _____ (I)? 3. She often _____ (wa
• Maybe he can _______ in our club.[ ]A. beB. isC. /-七年级英语
• 蘑菇是生态系统中的分解者．______．-生物
• 如图为某草原生态系统中的食物网示意图，请据图回答：（1）在此生态系统中青蛙和蜘蛛除了捕食关系外还有______关系．（2）在草原生态系统的组成中，图未画出的生态系统的组成成分是-生物
• 下列属于生产者的是（）A．工人B．农民C．植食性动物D．绿色植物-生物
• —Mike’s parents have bought a 2-floor house with a swimming pool.— Oh, it________ be very expensive.
• ---What should we do first if we want to develop our village?---Lots of new roads ________, I think.
• --Listen! Is Tom singing in the room?-- No, it ______ be Tom. He has gone to Paris. A. mustn’t B. n
• 能量在食物链的流动过程中被多种生物______，与能量流动不同，物质可以以某种形式在生态系统中______．-生物
• —Mary, you bring my math book to school?—OK, Dave. [ ]A. can B. are C. doD. is -七年级英语
• 消费者与生产者之间形成的关系主要是指（）A．动态平衡B．相互依存C．吃与被吃D．互相利用-生物
• Kids _________ use the computers to draw in the future.A．canB．couldC．will be able toD．will can-八年级英语
• 用 be( am,is,are) 的适当形式填空。1. Excuse me! ______ this your ruler?2. What______those?______ they picture
• 用括号内所给词的适当形式填空。1. Linda and I______(be) good friends.2. My father is a teacher.______(his) is 36 yea
• —Must I finish the work today, Mom?—No, you . You can finish it tomorrow .A. mustn’t B. can’t C. nee
• 要剪贴一张生态系统模式图，不可缺少的生物是（）A．太阳B．动物C．植物D．空气-生物
• 用am,is,are填空。1．What ________ your name?2．My name ________ Tom. 3．I ________ John Brown. 4．Her name _
• 硝化细菌能利用氧化某些物质释放出来的能量，将二氧化碳和水合成有机物，它在生态系统中的成分属于（）A．生产者B．消费者C．分解者D．非生物的能量-生物
• --______ we clean the classroom at once? --No, you _____. You____ clean it after school.A．Must, need
• 人类通过农业生产获取粮食，人是生态系统中的（）A．生产者B．消费者C．分解者D．以上都是-生物
• 下列哪一项不是生态系统的物质循环（）A．能量循环B．水循环C．碳循环D．氮循环-生物
• 用括号中所给词的适当形式填空。1.__ (be) that your dictionary?2.I _____ (be)Xiaofang.My last name__(be) Guo.3.What&#
• — May I take the magazine out of the reading room?— No, you can’t. You ______ read it here. It’s the
• -----Can I watch TV, Mom? -----No, you . You to do your homework first.A．don’t; haveB．can’t; can’tC．
• —Must I come back before supper, mum?—No, you .A．can’tB．mustn’tC．don’tD．needn’t-九年级英语
• — Can I go to the movie, Mum?— Certainly. But you _______ be back by ten o’clock.A．canB．mayC．mightD．
• 当食草动物摄取食物时，植物体内的能量就会全部流入动物体内．______．-生物
• — Is Kate coming to the party this evening?— No, she _________ be the party. She________ to the UK.A
• 用am, is或are填空1. —What____your name? —My name____Linda.2. —Hello! How____you? —I____fine, thanks.3. —
• - You’d betterbecause you have to drive back home. - OK.A．not drinkingB．not to drinkC．not drinkD．don
• 在下列生物中，属于分解者的是（）A．猫B．水绵C．木耳D．小麦-生物