如图为人体心脏结构示意图�据图回答1心脏主要由肌肉组织肌肉组织构成.2图中abcd分别代表心脏的四个腔.四个腔中壁最厚的是b Template




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tomski如图为人体心脏结构示意图�据图回答1心脏主要由肌肉组织肌肉组织构成.2图中abcd分别代表心脏的四个腔.四个腔中壁最厚的是b coloring