如图为人体与外部环境之间的物质交换模式图数字� �表示人体的某些结构字母a F代表人体内某些物质请据图回答1图中a进入血液的主要 Template




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tomski如图为人体与外部环境之间的物质交换模式图数字� �表示人体的某些结构字母a f代表人体内某些物质请据图回答1图中a进入血液的主要 coloring