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【单选题】
关于躯干骨的组成,下列哪一项是错误的?( )A.
躯干骨包括椎骨、骶骨、尾骨、胸骨、肋骨
B.
独立椎骨共有24块,即颈椎7块,胸椎12块,腰椎5块
C.
肋是12对，1～7肋为真肋，8～12肋为假肋
D.
胸骨是由胸骨柄、胸骨体和剑突等三块骨组成
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D.
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E.
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