实验室的水族箱里生活着水生植物、动物、还有其他微生物，这样的水族箱可以看作是（）A．食物链B．食物网C．生态系统D．生物圈-生物

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• — What color _____Li Ming's clothes?— _____ white and black. [ ]A. does; It's B. do; We�
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• —People find it hard to get across the river．—I think at least two bridgesover it．A．needB．are needin
• There is a “ No smoking “ sign here. You _________ smoke.A．canB．mayC．needn’tD．mustn’t-九年级英语
• 由于市场销路不景气，菜农们种植的东瓜卖不出去．大量冬瓜都烂在田地里，这时，地里的微生物将（）A．数量下降B．数量上升C．不能生存D．稍有增加-生物
• —Do you like listening to Moonlight Sonata (月光曲)? —Yes. It ______ really beautiful. [ ]A. feels B. l
• —What did you say? —I said I _______ mad at you. [ ]A．was B．am C．will be D．were -八年级英语
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• Today is Wednesday. He _______ be at home. He _____ be at school.A．can’t, canB．can’t, mustC．mustn’t,
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