题目如图1为某生态系统食物�图图2为生态系统中的碳循环示意图“a E 表示生物成分甲 丁 表示生理或化学反应过程“→ 表示碳的流动 Template




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tomski题目如图1为某生态系统食物�图图2为生态系统中的碳循环示意图“a e 表示生物成分甲 coloring