如图是人体内气体交换和运输示意图请据图回答1图中ad分别代表什么气体a d .2a和b的交换过程是通过 来完成的而肺泡与 Template




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tomski如图是人体内气体交换和运输示意图请据图回答1图中ad分别代表什么气体a d .2a和b的交换过程是通过 coloring