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

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• — 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
• — Well, let's go to visit the amusement park this Saturday.— That _______ great. [ ]A. feels B.
• 用所给动词的适当形式填空1. Special 2 _______ (be) only 2 RMB for 10, and _____ (have) cabbage and mutton.2. Than
• — Shall we meet at the station at 8 a.m.? — In fact we _________. The train _________ until 10 a.m..
• 下列各组生物中，属于生产者的是（）A．蘑菇和青菜B．河蚌和海带C．水草和小麦D．病毒和玉米-生物
• 蓝藻、硫细菌、硝化细菌等，能够利用光能或化学能将无机物转变为储能的有机物满足自身对营养物质的需要．如这些自养型微生物属于（）A．生产者B．消费者C．分解者D．生产者和消费者-生物
• 能够把生物体内的有机物分解成二氧化碳并释放到无机环境中的生物是（）A．生产者B．消费者C．分解者D．以上都是-生物
• 从物质循环的观点看，人体内碳元素的最终来源是（）A．食物所含有机物中的碳B．非生物界中的碳酸盐C．大气中的二氧化碳D．生态系统中生产者-生物
• 在生态系统中，与碳循环始终结合在一起进行的是（）A．氮循环B．水循环C．能量流动D．能量循环-生物
• —______ you please tell me something about the life in Canada? — Sorry, I______ . I don’t know eith
• 根据句意，用括号内所给单词的适当形式填空。1. That _______ (sound) interesting.2. Here are my _______ (photo).3. What'
• He ________be at home because the light in his room is on.A．mustB．can’tC．canD．mustn’t-八年级英语
• 生物图中的动物必须直接或间接依靠下列哪项才能得以生存（）A．肉类食品B．绿色食品C．鸡蛋牛奶D．各种鱼类-生物
• Gina dances well. She can ____ in our school music festival.[ ]A. is B. am C. beD. are-七年级英语
• —______he at home now?—Yes, he is. He is______computer games. [ ]A. Is; playing B. Does; playC. Do;
• （1）生态系统的成分包括非生物的______、生产者、______和______．因此，在草原生态系统中，除图中表示出的各种生物外，还必须有______等生物类群．（2）在生态系统中，不同生物之-生物
• 在水草→草鱼→乌龟→人，这条食物链中，含能量最多的是（）A．水草B．草鱼C．乌龟D．人-生物
• I’m very glad I have my own room in my house. I ______ do what I want in it.A．mustB．have toC．needD．c
• Li Lei and I ______ good friends.[ ]A. areB. am C. is D. be-七年级英语
• You ______ to the meeting this afternoon if you have something important to do.A．needn’t to comeB．do
• 下列生物中属于生产者的是（）A．海带B．蘑菇C．酵母菌D．紫菜E．蕨菜F．木耳-生物
• 在生态系统中，能量流动一般是从绿色植物固定太阳能开始的。[]-八年级生物
• Here _____some flowers.[ ]A.isB.areC.amD./-七年级英语
• That man ________ be Mary’s father, as he is much taller.A． canB．mustC． can’tD． mustn’t-八年级英语