That young woman _____a teacher. She looks very graceful.[ ]A. may be B. can beC. must beD. won&#039

更多内容推荐

• If you _____the book, you ____ buy it right now, I think.A．needn’t, needn’tB．don’t need, don’t needC
• 单项选择。Lily and Linda ______ good friends. [ ]A. amB. isC. are D. be -七年级英语
• “花草”在生态系统中扮演的角色是（）A．消费者B．生产者C．分解者D．非生物部分-生物
• 改错。1. My favorite subject is math and English. 2. Why do she like music best?3. What's you favo
• —How many students are there in your school?—the students in our school over two thousand. A．The num
• 如图是某草原生态系统中的食物网示意图，请根据图回答问题．（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，图中未画出的生态系统的-生物
• —Peter doesn’t mind lending you his camera.—He __________. I’ve already borrowed one.A．needn’tB．can’
• 选择填空。 Where ______ Bob and Tom ______? [ ]A. is; from B. do; comes C. are; from D. does; from -七年级英语
• 选择填空。______ you from England? [ ]A. Are B. Do C. Where D. How -七年级英语
• 地理中国栏目报道：广西某地最近突然出现了一条“变色河”，该河大多河段清澈见底，唯独在靠河岸某处呈黄褐色；不久之后，该处黄褐色会逐渐消褪，却又在较远的河中央开始出现．（-生物
• 梅花山是国家级森林和野生动物自然保护区．梅花山生态系统中的非生物因素包括（）A．生产者B．消费者C．分解者D．空气、水分、阳光-生物
• Tom has grown enough to take care of.A．tall; himB．tall; himselfC．old; himD．old; himself-九年级英语
• 墨西哥湾漏油事件发生后，中美科学家发现了一种能“吸食”石油的细菌．这种细菌属于（）A．生产者B．消费者C．分解者D．消费者和分解者-生物
• 选择填空。Yesterday ______ my little brother's third day to school. [ ]A. is B. was C. are D. be -七年
• Nanjing isn’t so large __________ Shanghai, however, it’s the second __________ city in East China.A
• 在生态系统中，绿色植物属于（）A．生产者B．消费者C．生物部分D．非生物部分-生物
• 硫细菌能利用化学能将无机物转变为有机物，这类细菌在生态系统中属于（）A．生产者B．消费者C．分解者D．消费者和分解者-生物
• The final exam is coming. Our teachers tell us _____ time. A. not to waste B. not waste C. don’t was
• When I was a child, my grandmother _____ me interesting stories. A. used to tell B. is used to telli
• – Whose notebook is this? -- It _____ Tom. I saw he used it just now. A. must belong to B. can’t bel
• 选择填空。Who ______ the women in the picture? [ ]A. is B. are C. be D. am -七年级英语
• You ______ wear sports shoes when you climb a mountain.A．can’tB．shouldn’tC．mustn’tD．have to-九年级英语
• 下列关于生产者的叙述中，正确的是（）A．生产者是在自然界中不依赖外界环境，能独立生存的生物B．生产者的营养方式肯定是自养C．生产者中绝大多数为自养，少数为异养D．生产者的再-生物
• 生态系统的能量是沿着食物链依次流动的．一般说，一个环节只能把所获得能量的约______传递给下一个环节，也就是说，能量的流动具有______特点．生态系统的稳定性是指生态系统经-生物
• ―______ you born?―In a town near Tianjin. [ ]A. When wereB. Where did C. Where were D. Where was -八年
• 生态系统的营养结构基础是（）A．生产者和分解者B．食物链和食物网C．物质和能量D．空气和水-生物
• 生物圈中的动物必须直接或间接地以______为食，通过消耗绿色植物合成的______来维持生活，所以，动物是生物圈中的______．-生物
• 细菌属于生态系统中的______，其生殖方式是______．-生物
• 句型转换，每空一词。1. They're used for seeing in the dark. (改为否定句)Theyfor seeing in the dark. 2. Liu Wei
• The number of teachers in our school _______ greatly increased last term.A number of teachers in thi
• My sister has practiced tennis for a long time. She plays tennis _____ you. A. as good as B. so well
• —________ I smoke here?—No. You are not allowed to smoke in public places.A．CouldB．MustC．MayD．Might-
• 近年来，我国大力开发建设西部地区．要求西部地区切实搞好生态环境保护，退耕还林，治理水土流失，防止沙漠化等．据此回答下列问题：（1）从生物学角度分析，改善西部生态环境，首-生物
• 根据右图回答生物学问题．（1）植物是生态系统的______者，它可以通过______作用制造有机物．（2）细菌和真菌是生态系统的______者，它们的作用是______生态系统的物质循环．（3）陆地-
• 植物、动物和细菌真菌在生态系统中分别是（）A．消费者、生产者、分解者B．分解者、消费者、生产者C．生产者、消费者、分解者D．生产者、分解者、消费者-生物
• 关于细菌和真菌在生态系统中的作用，错误的叙述是（）A．把动植物的遗体分解后还原到大自然中B．细菌和真菌会使动植物致病，在生态系统中只有害处C．如果没有细菌和真菌，地球上就-生物
• 下列属于消费者和生产者之间关系的是（）A．山羊吃树叶B．兔子吃蘑菇C．人类吃黑木耳D．青蛙捕食蝗虫-生物
• 某池塘生态系统中生活着浮游植物、浮游动物、水草、螺蛳、鲫鱼、乌鱼等生物，池塘附近的化工厂排放的废水中含有某种重金属，使池塘受到了污染，科研人员对池塘中一些生物体内-生物
• Alice would like to_____an astronaut when she grows up. [ ]A. became B. as C. beD. been-九年级英语
• I have two brothers. One is a teacher, _________ is a doctor.A．anotherB．other C．othersD．the other-九年
• —________ I watch TV now,Mom?—No.It’s too late ,and you ______ go to bed.A．May;have toB．Will;shouldC
• _______ Tom _______ Peter are fond of watching TV.A．Not only…but alsoB．Both…andC．Either…orD．Neither…
• 一个完整的生态系统无论大小，都是由（）A．生物部分和非生物部分组成B．阳光、空气、水组成C．植物、动物、细菌、真菌组成D．生产者、消费者、分解者组成-生物
• 生态系统的组成包括以植物为代表的______、以______为代表的消费者和以微生物为代表的______和如阳光、空气、水等的非生物部分．-生物
• 真菌和细菌在生态系统中占有重要地位，是因为它们（）A．是食物的主要来源B．能将有机物分解为无机物返回到无机环境中C．能释放氧气D．能净化空气-生物
• —David, is that man your Chinese teacher?—It_______be him. He's having a meeting. [ ]A. mustn&#
• —Must I be home before eight o’clock, Mum? — No, you . But you have to come back before ten o’clock.
• What way can you think of ______ the mice in the room?A．how to killB．to killC．killingD．killed-九年级英语
• ---May we go home mow ? --- No, you____. You____ to go home until 5 o’clock.A．mustn’t; are allowedB．
• –Will the new iphone cost a lot? --I ______ think so. Apple’s products are usually expensive. A．shou