如图为人体血液循环和气体交换示意图图中1234表示心脏各腔.请据图回答问题1在1和23和4之间存在着防止血液倒流的 .2 Template




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tomski如图为人体血液循环和气体交换示意图图中1234表示心脏各腔.请据图回答问题1在1和23和4之间存在着防止血液倒流的 .2 coloring