下列各组生物中，属于生产者的是（）A．蘑菇和青菜B．河蚌和海带C．水草和小麦D．病毒和玉米-生物

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• —______ you please tell me something about the life in Canada? — Sorry, I______ . I don’t know eith
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• Gina dances well. She can ____ in our school music festival.[ ]A. is B. am C. beD. are-七年级英语
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• 在生态系统中，能量流动一般是从绿色植物固定太阳能开始的。[]-八年级生物
• Here _____some flowers.[ ]A.isB.areC.amD./-七年级英语
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• 现在一些商店里流行一种生态球，该球密封，内装有水，两三条小鱼或小虾自由地在水中游动着，底部有珊瑚、沙子，并长有一些绿绿的水藻．（1）这个生态球可以看作是一个生态系统吗-生物
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