右图是血液循环和气体交换示意图请据图回答 1图中的f是 H是 E与f之间的房室瓣保证血液从 流� 不会倒流在人体四肢静脉内也有 Template




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tomski右图是血液循环和气体交换示意图请据图回答 1图中的f是 h是 coloring