如图为生态系统中碳循环过程其中甲乙丙丁构成系统的生物群落箭头表示物质循环方�.下列相关叙述正确的是 A.碳元素在����过程中 Template




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tomski如图为生态系统中碳循环过程其中甲乙丙丁构成系统的生物群落箭头表示物质循环方�.下列相关叙述正确的是 a.碳元素在����过程中 coloring