[診斷學(xué)基礎(chǔ)]A.Vl、V2

原題:
[診斷學(xué)基礎(chǔ)]A.Vl、V2

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選項(xiàng):
B.V7、V8、V9
C.V3、V4
D.I、aVL
E.Ⅱ、Il、aVF