--Whose backpack is this? ---It be Jim’s. Look, his student’s card is in it.A．mustB．canC．mustn’tD．ca

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• — 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
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• －Are people around you used to _______things online?－Yes. It’s much easier, and also cheaper.A．order
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• It rained heavily, so we _______ stay at home watching TV or surfing the Internet all day. A. could
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• 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
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• — everybody here yesterday? —No, Linda wasn't here. [ ]A. Do B. Does C. Is D. Was -八年级英语
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• 鲁迅先生在《从百草园到三味书屋》中写到：“不必说碧绿的菜畦，光滑的石井栏，高大的皂荚树，紫红的桑椹；也不必说鸣蝉在树叶里长吟，肥胖的黄蜂伏在菜花上，轻捷的叫天子（云雀-生物
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• 如图是某生态系统简图，请据图答题：（1）在这个生态系统中，阳光、空气、水等属于______因素．（2）图中陆地部分的食物网可画出几条食物链：______（3）如果食虫鸟的数量大量减少，对-生物
• 选择填空。—Hello! I ______ Jim. What's your name?— My name ______ Sally. [ ]A. am, is B. are, am C.
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• 生物圈中到处都有绿色植物．地球上包括我们人类的其他生物都离不开绿色植物．请就所学的知识回答：（1）绿色植物是生态系统中的______．（2）植物体的生长发育是从______开始的．（3）绿-生物
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• 如图示某两地生态系统中的甲、乙两个食物网，请根据所学知识回答问题．（1）甲和乙两图所示部分都不能称为生态系统，原因是______；在各自的生态系统中甲和乙的生产者都是_____-生物