如图为肺的内部结构及血液循环示意图请据图分析回答1图中标有�的结构名称是 此处适于气体交换的特点是数量很多其外包绕着 两种壁都很 Template




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tomski如图为肺的内部结构及血液循环示意图请据图分析回答1图中标有�的结构名称是 此处适于气体交换的特点是数量很多其外包绕着 两种壁都很 coloring