9.如图是血液循环和气体交换示意图请据图回答1图中的6是指肺静脉7是指主动脉.2血液由2射出流经56到3的循环途径叫肺循环 Template




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tomski9.如图是血液循环和气体交换示意图请据图回答1图中的6是指肺静脉7是指主动脉.2血液由2射出流经56到3的循环途径叫肺循环 coloring