下列关于生态系统食物链中能量和物质的叙述 正确的是�物质是单�流动 不循环的 �物质是单�流动 可循环的 �能量是单�流动不循环的� Template




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tomski下列关于生态系统食物链中能量和物质的叙述 正确的是�物质是单�流动 不循环的 coloring