下图为一个生态系统中某些生物的相对数量关系,这些生物构成了一条食物链。在这条食物链中物质和能量流动的方�是 a甲→乙→丙→丁 b丙→ Template




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tomski下图为一个生态系统中某些生物的相对数量关系,这些生物构成了一条食物链。在这条食物链中物质和能量流动的方�是 a甲→乙→丙→丁 b丙→ coloring