如图是人体内某系统结构和功能示意图请据图回答1心脏的功能是为 提供动力.2心室与动脉之间 之间有防止血液倒流的瓣膜 .3肺 Template




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tomski如图是人体内某系统结构和功能示意图请据图回答1心脏的功能是为 提供动力.2心室与动脉之间 之间有防止血液倒流的瓣膜 coloring