如图是人体某处毛细血管示意图请回答下列问题�若c是肺泡外毛细血管�则肺泡内的氧气能通过扩散作用扩散作用作用穿过22层细胞进入b内的 Template




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tomski如图是人体某处毛细血管示意图请回答下列问题�若c是肺泡外毛细血管�则肺泡内的氧气能通过扩散作用扩散作用作用穿过22层细胞进入b内的 coloring