如图为人体血液循环示意图.图中abcd表示心脏各腔. 请据图回答1人体血液循环的动力器官是 .2心脏四个腔中 的壁最厚.3b和 Template




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tomski如图为人体血液循环示意图.图中abcd表示心脏各腔. 请据图回答1人体血液循环的动力器官是 .2心脏四个腔中 coloring