单项选择题
A.P波时限>0.12s B.PtfV1绝对值为0.05mm.s C.PⅡ、Ⅲ、aVF振幅≥0.25mv，P波高尖 D.Ⅱ、Ⅲ、aVF导联P波双峰，峰间距≥0.04s E.P波形态圆钝，振幅在肢导<0.25mv，胸导<0.2mv
A.0.12-0.20s B.0.10-0.20s C.0.06-0.08s D.0.32-0.44s E.0.08-0.24s
A.V5/V6导联B.V4-V6导联C.V1/V2导联D.V3/V4导联