题目图1是人体内的动脉和静脉的横切面图图2是人体内血液与组织细胞之间的气体交换示意图请据圈回答有关的问题图1中的编号�血管管壁较 Template




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tomski题目图1是人体内的动脉和静脉的横切面图图2是人体内血液与组织细胞之间的气体交换示意图请据圈回答有关的问题图1中的编号�血管管壁较 coloring