题目内容
关于左冠状动脉的说法,下列哪项是恰 当的()
2021-11-29
A.起于主动脉弓
B.分为前室间支和旋支
C.分支分布于室间两的后1/13
D.分为前室间支和后室间支
E.旋支分布于右心室侧壁
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