如图是血液循环和气体交换示意图请据图回答1图中的5所指的是肺动脉内流静脉血.图中7所指的是主动脉内流动脉血.2血液由2射出 Template




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tomski如图是血液循环和气体交换示意图请据图回答1图中的5所指的是肺动脉内流静脉血.图中7所指的是主动脉内流动脉血.2血液由2射出 coloring