图是“生物圈碳 氧平衡 示意图分析回答1推测图中ab所代表的生理活动a是光合作用b是�吸作用 2ab两个过程中能够降低 Template




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tomski图是“生物圈碳 氧平衡 示意图分析回答1推测图中ab所代表的生理活动a是光合作用b是�吸作用 coloring