一个池塘内有水草浮萍水绵鱼虾河蚌等生物共同组成一个生态系统1该生态系统中能量和有机物的来源分别是 2水草和水绵在此 Template




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tomski一个池塘内有水草浮萍水绵鱼虾河蚌等生物共同组成一个生态系统1该生态系统中能量和有机物的来源分别是 2水草和水绵在此 coloring