如图为人体的血液循环系统示意图请据图回答1a是左心房b是左心室c是右心房d是右心室1是主动脉2是肺静脉3是肺动脉4是上下 Template




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tomski如图为人体的血液循环系统示意图请据图回答1a是左心房b是左心室c是右心房d是右心室1是主动脉2是肺静脉3是肺动脉4是上下 coloring