用 is / isn't/ am / are 填空1. Thismy teacher .2. Ifine.3. Is she Maria ？No， she 4.you Jane ？ No，

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• 在一条食物链中，第二营养级的能量至多有多少流入到第五营养级（）A．15B．1125C．1100D．11000-生物
• 下列关于“螳螂捕蝉，黄雀在后”这句谚语的叙述，正确的是（）A．螳螂和蝉的发育过程中，都没有蜕皮现象B．谚语中包含的食物链是：螳螂→蝉→黄雀C．在生态系统中，蝉、螳螂和黄雀都属-生物
• —Can I go to the park, Mum?—Certainly. But you ______ be back by six o’clock. A．can B．may C．might D．
• 分析生态系统简图，回答有关问题：（1）在这个生态系统中，非生物因素出了泥土外，还有温度、______、水和就空气等．（2）该生态系统中，分解者是______．（3）该生态系统中，最长的一-生物
• 连线题A组：A、猫头鹰----1、分解者B、蘑菇----2、生产者C、菠菜----3、消费者B组：A、老虎吃野猪----1、合作关系B、许多蜜蜂在酿蜜----2、竞争关系C、田里的水稻与杂草----3
• 用am, is, are填空。1. Alice _____ my sister.2. I_____ 12 years old.3. You_____welcome.4.He and I_____in
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• 如图甲为自然生态系统的生态金字塔，乙为城市生态系统（属于人工生态系统）的生态金字塔．以下解释不符合客观事实的是（）A．甲图表示能量流动的途径是绿色植物→食草动物→食肉动物-生物
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• 一位同学将鱼、田螺和一些水生植物一起放在盛有水的密封的广口瓶里（如图），并在瓶的近旁放一盏电灯．分析回答：（1）在广口瓶生态系统中，生物因素和非生物因素各有哪些？______．-生物
• ---There _____ anybody in the room. --- Why do you say so? --- Because the door is locked.A．must not
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• 某同学把调查一农田生态系统作为研究性课题．把认真考察了西瓜从播种到收获的全过程，下面是他的部分调查内容及感想和疑问，请分析回答（1）农民在播种前，先要浸种、催芽．1000-生物
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• Whereyour cousin? [ ]A.does,from B.is,come from C.is,from D.are,from-七年级英语
• 如图表示的是某生态系统的部分组成，请据图回答：（1）图中太阳光、空气属于生态系统的______因素．（2）图中属于生态系统中生产者的是______．（3）图中属于分解者的是______．（4）螳螂-生
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• 如图是某一农田生态系统示意图，根据图回答下列问题：（1）该生态系统中，非生物成分除了水、空气、温度外，还应该有______．（2）图中禾谷类植物通过光合作用合成有机物，为其它生-生物
• —_____ I have a ticket, please? —Sorry, sir. All the tickets were sold out ten minutes ago.[ ]A. May
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• 关于植物在生物圈中的作用，下列表述不正确的是（）A．参与生物圈的水循环B．作为分解者参与生物圈的物质循环C．维持生物圈中的碳-氧平衡D．为生物圈中的其它生物提供基本的食物来-生物
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• __________ your new pen pal like?[ ]A. WhatB. What'sC. How isD. How does-八年级英语
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• The room_____very quiet. The students are playing outside.[ ]A. sound B. sounds C. sounded D. soundi
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