观察心脏结构回答问题1心脏四个腔中壁最厚的是 和它相连的血管是 .2在心脏的 之间 之间都有防止血液倒流的瓣膜 Template




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tomski观察心脏结构回答问题1心脏四个腔中壁最厚的是 和它相连的血管是 .2在心脏的 coloring