下图是血液循环和气体交换示意图请据图回答1图中的2代表 3指的代表 2图中6指的是 7指的是 3血液由2射出流经56 Template




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tomski下图是血液循环和气体交换示意图请据图回答1图中的2代表 3指的代表 2图中6指的是 coloring