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

更多内容推荐

• 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
• There ______ a number of people in the airport. The number of people who travel by plane ______ larg
• 如图表示某生态系统组成示意图，以下说法正确的是（）A．从图中可以看出一个完整的生态系统包括生产者、消费者和分解者B．如果此生态系统受到了有毒物质DDT的污染，那么植物体内-生物
• — _good time we had at the party last night!— Yes. It was _____ exciting party that I would never fo
• --Whose backpack is this? ---It be Jim’s. Look, his student’s card is in it.A．mustB．canC．mustn’tD．ca
• The line of people outside the house ____ endless on that morning of the day. [ ]A. isB. areC. wasD.
• I love the dress.It’s ________.A．out of styleB．in styleC．inthe styleD．out style-八年级英语
• — I think Mr. Zhang may be in his office.— No, he _____ be there. I saw him ____ there just now.A．ca
• —Whose schoolbag is this?—It ___________ be Mary’s. It has her name on it.A．canB．mayC．willD．must-九年级
• 单项选择。Jenny, Danny and I ______ from Canada. [ ]A. amB. is C. are D. comes -七年级英语
• 小科同学走近一鱼塘边的某一位置时，鱼塘中的鲤鱼便会成群地向他游来，并逐渐向他聚集，如图所示．（1）对此现象的解释最合理的是______．A．鲤鱼本身具有亲近人的特性B．鲤鱼本身-生物
• — Good morning. I've got an appointment with Ms King in her office.— Morning. You _______be Mr
• ______ your parents strict ______ you in your study?[ ]A．Is, with B．Are, in C．Is, in D．Are, with -九年
• 油菜是一种我们比较常见的油料农作物，农民铜多种植油菜收获油菜籽，油菜籽经过加工可以制成菜油．请回答：（1）油菜是生态系统组成成分中的______．（2）油菜进行光合作用过程中，-生物
• —Must I return the hook tomorrow morning? —No, you _ .You can keep it longer.A．mustn'tB．can
• Here ______ some parts of plants we eat. [ ]A. be B. is C. are D. am -八年级英语
• You _____ lose your way if you walk alone in the mountains at night.A．mayB．needC．shouldD．ought to-九年
• 单项选择。Maths ______ easy to learn well. [ ]A. is B. areC. am D. be -七年级英语
• — May I do the homework tomorrow?一 No, you______. You should hand in before class tomorrow. A. mustn
• Where my glasses______? I can't find them. A. is B. are C. was-九年级英语
• 单项选择。Yesterday I ______ tired but happy. [ ]A. am B. was C. is D. are -七年级英语
• 如图是某地生态系统图，请据图回答：（1）该生态系统中生产者是______．（2）该生态系统中细菌、真菌、蚯蚓属于______．（3）该生态系统中有多条食物链，在“草→昆虫→食虫鸟→鹰”这条食-生物
• 一个生态系统无论大小，都是由______和______组成的．-生物
• －Are people around you used to _______things online?－Yes. It’s much easier, and also cheaper.A．order
• Lucy _____ born _____ London _____ May 1, 1986 [ ]A. is; in; onB. was; in; on C. was; in; in D. is;
• Mom bought ____ oranges for me, but I’d like to drink some ________. A. many; oranges B. much; orang
• —Miss Li, must we hand in our homework right now?—No, you ____.You can hand it in tomorrow.A．don’tB．
• It rained heavily, so we _______ stay at home watching TV or surfing the Internet all day. A. could
• Not only I but also he helpful to others. [ ]A. am B. is C. are D. be -九年级英语
• 下列有关生态系统的叙述中，正确的是（）A．生态系统的组成成分包括生产者、消费者和分解者B．生态系统中各利生物的数量和所占的比例是不变的C．生态系统中的物质和能量是沿着食物-生物
• —How often do I need to feed the birds?—They ________ food every day，or they will be hungry.A．must g
• 如图是生态系统的能量流动示意图．（1）上图说明，输入改生态系统的能量，来自于图中______的______作用．（2）在生态系统中，能量是沿着______依次流动的．当能量在逐级传递时，由-生物
• 下列生物中，属于生产者的是（）A．牛B．蘑菇C．人D．向日葵-生物
• 选择填空。—How many bookcases ______ there in your study?— There ______ one. [ ]A. are, is B. is, are C.