9.如图是人体心脏结构示意图据图回答下列问题1体循环开始于b左心室结束于c右心房.2肺循环开始于d右心室结束于a Template




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tomski9.如图是人体心脏结构示意图据图回答下列问题1体循环开始于b左心室结束于c右心房.2肺循环开始于d右心室结束于a coloring