在农田生态系统中，青蛙属于（）A．分解者B．消费者C．生产者D．非生物因素-八年级生物

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• 如图表示的是能量流动方向的示意图．请据图回答：（l）图中①表示______作用，它将太阳光能转变成储存在植物体内有机物中的能量，这个过程在细胞的______（叶绿体/线粒体）中进行．（-八年级生物
• 根据如图回答下列问题：（1）图中太阳光、空气属于生态系统的______部分．（2）图中属于初级消费者的是______，属于最高消费者的是______．（3）螳螂的发育属于不完全变态，与家蚕相比-八年级
• 用be动词的适当形式填空。1. What _____ your name?2. My telephone number _____ 2746598.3. This _____ my ID number
• ---Honey, stay home before I return. ---I _______, mum. A．mustB．can C．willD．should-九年级英语
• ---Is the girl in the red skirt your sister?---No. It _______ be her. She has flown to Australia.A．c
• ---Dad, must we wait until the light becomes green?---Yes, I’m afraid we ______. That’s the traffic
• The man in the office ____be Mr. Black because he phoned me from London just now.A．mustn’tB．may not
• This blue car ____________ be Bob’s bcause his car is black.A．can’t B．must C．could D．would-九年级英语
• 下列有关生产者、消费者和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．分解者可将动植物遗体分解成无-八年级生物
• —Where is Jack, please?—He _____ be in the reading room. [ ]A. can B. need C. would D. must -九年级英语
• Each of you _____ unique means you each _____unique.[ ]A.is, is B. are, areC. are, isD. is, are -七年级
• 将下列句子改为否定句。1. Mrs Green is my history teacher.Mrs Green _____ _____ my history teacher.2. Her father
• — Do you know whose magazine is it?— I think it be Lily’s, for we can find her name on the cover.A．c
• — Be quiet, the head teacher Mr. Gu is coming.— Don’t worry. It _____ be him. Mr. Gu is much fatter.
• — Simon, when are we going to have a class meeting this week?— Sorry. Ask our monitor, please. He kn
• --Must I finish my homework now?--No, you _______ You can do it tomorrow.A. can't B. needn'
• －Two hundred yuan for such a T-shirt! You ______ be joking!－I’m not joking . It’s made of silk.A．can
• —–I think the man over there must be Tom.—–It _____ be him. He has ______ to America.A．can’t；goneB．c
• 如图表示生态系统的组成，图中X、Y分别代表（）A．绿色开花植物、酵母菌B．绿色开花植物、蝗虫C．生产者、酵母菌D．消费者、草-八年级生物
• 用am, is或are填空。1. He _____ my cousin.2 What_____ these?3. Here _____ two eggs for your sister.4. ____
• 从生态系统的组成来看，洞庭湖中的所有鱼属于（）A．生产者B．消费者C．分解者D．非生物成分-八年级生物
• You _________ get up so early. It’s weekend today.A．mustn’tB．can’tC．needn’tD．oughtn’t-九年级英语
• I’m very glad I have my own room in my house. I ____ do all I like in it.A．can B．must C．willD．need-九
• —Must I pay for the bill now, boss?—No, you __________ pay for it after the meal.A．needn’tB．can’tC．m
• —Must I finish the homework tonight?—No, you.You can finish it tomorrow.A．mustn’tB．needn’tC．need D．m
• —You look pale. What's wrong with you?—I_____ terrible. I think I have the flu.[ ]A. feelB. fel
• —Could I invite my friends to my birthday party?—Sorry, you ______.A．canB．can’tC．couldD．couldn’t-九年级
• Her shoes _____ twenty dollars and his T-shirt_____ also twenty dollars.[ ]A. are;are B.are;is C.is;
• 用所给词的正确形式填空。1. That ______ (sound) interesting. 2. ______ you ______ (have) a tennis racket? 3. My b
• 如图表示某生态系统中生物之间的食物关系．据图回答：（1）从生态系统的成分看，水稻属于______，青蛙属于______．除了图中表示出的成分外，该生态系统还应有______、非生物的物质-八年级生物
• –– ________ I come back before 6 o’clock?–– No, you _______ . But you ______ be back later than 7 o’
• ---Shall we meet at the station at 7 am?---In fact, we _______. The train _______ until 9 a. m.A．mus
• -I walk such a long way on such a hot day .-Oh, dear ! You____ be tired and thirsty. Sit down and ha
• ---I don’t want to go to school on foot. What should I do? ---You try asking your father for a bike,
• –Look at that red bike, it _____ belong to you. I have seen you ride it. --But it ____ be mine. Mine
• The class meeting _____ from 3:00 to 4:00 yesterday.[ ]A. beganB. startsC. lasted D. started-八年级英语
• —Can you swim in the river? — No, I _____. [ ]A. mustn't B. may not C. can't D. needn'
• — Who is the man in front of our classroom? Is it Mr. Zhang? — No, it ______ be him. He is much tall
• I want to _____ in the music club.[ ]A. amB. beC. isD. are-七年级英语
• 下列关于生态系统的能量流动的叙述中错误的是（）A．能量是沿着食物链依次流动的B．能量在生态系统的流动时单向的C．能量在沿食物链的传递过程中是逐级递增的D．能量流动是生态系统-八年级生物
• --- Shall we meet at the station at 8 a.m.?--- In fact we _________. The train _________ until 10 a.
• – May I smoke here?-- No, you ______.A. can’t B. mustn’t C. may not-九年级英语
• ---Could I have some snacks between meals, mum?---No, you __________.A．couldn’tB．shouldn’tC．can’tD．m
• ---Fifty dollars for such a T-shirt! You _______ be joking!---I’m serious．It’s made of silk.A．mustB．
• —"Do you want to go swimming this afternoon?" —"Yes, if the weather _____ warm."
• Four hundred dollars for just a pair of shoes? You ______ be joking!A．mayB．canC．can’tD．must-九年级英语
• 句型转换，每空一词。1. That is my friend. (改为复数句)Those _______ my_______.2. —Is that your mother? (作否定回答)—No,
• 如图一表示某生态系统中的食物网；图二表示的是某条食物链中三种生物体内所含有机物总量的直方图．请据图回答下列问题：（1）作为一个完整的生态系统，图一中缺少的生物成分是__-八年级生物
• 用am, is或are填空。1．I_______a boy.2．What _______ this in English?3．His name Tony.4．How ______ you?5．She
• Generally speaking, there _______ be any survivors(幸存者) after such a long time. However, two young p