如图是生态系统中磷循环模式图图中的英文字母代表不同的生物类群.请根据此图回答问题1仔细观察可�现图中缺�一个重要的箭头请在图中补画 Template




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tomski如图是生态系统中磷循环模式图图中的英文字母代表不同的生物类群.请根据此图回答问题1仔细观察可�现图中缺�一个重要的箭头请在图中补画 coloring