植物是生物圈中的______者，动物是生物圈中的______者，大部分腐生微生物是生物圈中的______者．-生物

更多内容推荐

• 生物可以利用的能量最终来源于（）A．植物B．动物C．土壤D．太阳-生物
• 下列有关生产者、消费者、分解者之间关系的叙述不正确的是（）A．生产者可为消费者提供食物和栖息场所B．消费者有助于植物传粉受精、种子传播C．分解者将动植物遗体分解成无机物又-生物
• 用助动词和情态动词do, does, don't, doesn't, is, am, are, be, can, can't填空1. —Does he have a ba
• —Let's play computer game.—That _________ good.[ ]A. is soundB. soundC. soundsD. is sounds-七年级英
• —_____yourfamilywithyouinChina?—No,theyareinAmerica. [ ]A. Is B. Do C. Are D. Does -七年级英语
• There's going to a film at the cinema this evening. [ ] A. beB. have C. beingD. having-七年级英语
• Red good luck. [ ]A. thinksB. meansC. looks D. hears-七年级英语
• 观察图，据图回答下列问题：（1）生态系统中，图中A是______者，B是______者．（2）从图中我们观察到生态系统中的分解者是______，它们把动植物的遗体分解成______、水和无机盐．（3-
• --______you swim? -- No, I can’t. A．CanB．MayC．MustD．Need-九年级英语
• –What _______ Amy going to buy for the trip?–She will buy some fish. What ____ we buy then? A．is; sh
• – Do you know whose book this is?—Let me have a look . It Wei Fang’s . Look, here is her name.A．can
• ---I argued with my best friend yesterday and I don’t know what to do now. ---Maybe you _______ say
• ____ theygood ____ theirfriends ?[ ]A. Do ,with B. Are ,at C. Are , withD. Do ,at-七年级英语
• -- _____ I ask you a question, Mr. Wang?-- Yes, you _______.A．Can, can’tB．Can, mayC．May, canD．May, m
• Good morning, Mr Smith! My name ____Jack. [ ]A. Is B. is C. are-七年级英语
• 湖泊生态系统中的草食鱼以水草为食，属于消费者；肉食鱼以草食鱼为食，应属于（）A．生产者B．消费者C．分解者D．消费者和分解者-生物
• 在生态系统中，能将有机物分解成简单的物质，供植物利用的是（）A．植物B．动物C．细菌D．阳光-生物
• 动物在生态系统中主要充当（）A．分解者B．消费之和分解C．消费者D．生产者-生物
• 下列做法中不正确的是（）A．农民在生态系统中扮演的角色是生产者B．食物链和食物网是生态系统的重要组成部分C．生态系统的功能是物质循环和能量流动D．生物圈是地球上最大的生态系-生物
• 在一块农田里，稻卷叶虫，蝗虫是危害水稻的害虫，青蛙是捕捉害虫的能手．那么，在这个生态系统中，这块稻田的水稻是______，其作用是______，蝗虫和青蛙是______，在这块稻田-生物
• 生态系统由______和______组成，其中植物在生态系统中扮演的角色是______，动物在生态系统中扮演的角色______，分解者是______．-生物
• 下列各项中，属于分解者的是（）A．水族箱中的金鱼藻B．金鱼的饵料水蚤C．潮湿阴暗处生长的苔藓D．朽木上生长的蘑菇-生物
• 初级消费者体内的能量其去路不包括（）A．用于自身生命活动B．被第二营养级所获得C．通过呼吸作用被消耗掉D．被分解者分解发散到环境中去-生物
• — My clothes are out of style.-—Maybe you should ______ some new clothes.A．buyB．boughtC．buyingD．boug
• there a bank near here?[ ]A.AreB. Is C. Am D. Be-七年级英语
• Mary, together with his parents, ______ going to visit Shanghai next month.[ ]A. wasB. isC. wereD. a
• Mr. and Mrs. Smith _____ busy _____ their housework. [ ]A. is, with B. are, with C. is, do D. are, d
• With the help of the new technology, you __ e-mail your friends by mobile phone.A．canB．mustC．needD．s
• 用am, is, are填空。1. I _______ Peter Hunt.2. My name _______Bill.3. I _______twelve.4. My family name__
• —I want to know if I _______________smoke here. —No, you ______________. Could you see the sign “ No
• 由于______流、______流和______流的存在，生物与环境才成为统一的整体．-生物
• -----Look! The girl dancing in the gym ____ be Joe. She is the girl who loves dancing too much, you
• It is usually warm in my hometown in March, but it ____be rather cold sometimes.A．mustB．canC．shouldD
• — Could I borrow your dictionary?— Of course you ______. A．mustB．canC．shouldD．need-九年级英语
• This book _____ Lucy’s. Look! Her name is on the book.A．must beB．may beC．can’t beD．mustn’t be-八年级英语
• — Must I finish the exercise at school? — No, you don’t have to. You do it at home.A．mustB．needC．wil
• Those eggs _______, please throw them away. [ ]A. smell badlyB. are smelled badC. are smelled wellD.
• —How much _______ this pair of trousers?—Ten dollars _______ enough.[ ]A. are; is B. is; are C. are;
• An eraser and a bookon the table.[ ]A amB isCare-七年级英语
• 用be的适当形式填空。1. —What _______it in English? —It _______a book.2. —Who _______that man? —He’s Tom’s fat
• ____ I fill in the application form right now, sir? No, you needn’t. You can complete it this aftern
• be动词的适当形式填空1. —What color _______ your pencils?—They _______ blue.2. —How ______ Frank? —He ______ f
• 看图回答：下列说法错误的是（）A．草是生产者，兔、鼠、狐、蛇、鹰是消费者B．最长的食物链是：草→鼠→蛇→鹰C．在生态系统中，各种生物的数量和比例总是维持在绝对平衡的状态，这种-生物
• 用直线将相关内容链接起来．生产者细菌、真菌消费者植物分解者动物．-生物
• 一条食物链中，兔子不吃狼，但狼吃兔子，该食物链的不可逆性说明一个生态系统中（）A．氧循环是单向的B．水循环是单向的C．碳循环是单向的D．能量流动是单向的-生物
• A: Listen! Is it Linda singing in the next room? B: No, it __________ be her. She is still in Shangh
• These are some students and that _________ their teacher.[ ]A. is B. am C. are D. be -七年级英语
• 请用所给词的正确形式填空.。1．How_________ （be）Helen?2．_________ （She）name is Jane．She is my friend．3．Hello，______
• 某动物能促进生态系统的物质循环，这是指它（）A．能合成有机物B．能分解有机物产生CO2、尿液，以便被生产者利用C．产生的粪便及其死后的遗体能被分解者分解，释放CO2等物质D．B、-生物
• How much_____ these carrots?[ ]A. areB. isC. doD. does-七年级英语