P波时间／PR段时间比值为（）

A.0.09～0.22s
B.0.10～0.20s
C.0.12～0.20s
D.0.08～0.20s
E.0.11～0.20s

A.时限小于等于0.10s，肢体导联大于等于0.25mV，胸前导联小于等于0.20mV
B.时限小于等于0.12s，肢体导联小于0.25mV，胸前导联小于0.20mV
C.时限小于0.10s，肢体导联小于等于0.25mV，胸前导联小于等于0.25mV
D.时限小于0.11s，肢体导联小于等于0.25mV，胸前导联小于等于0.20mV
E.小于等于0.11s，肢体导联小于等于0.25mV，胸前导联小于等于0.15mV

A.Ⅰ、Ⅱ、aVL、V₁导联倒置，aVR正负双向
B.Ⅰ、Ⅲ、aVL、V₅到V₆导联倒置，aVR导联直立
C.Ⅱ、Ⅲ、aVF、V₁负正双向，aVR导联直立
D.Ⅰ、Ⅱ、aVF、V₃到V₆导联直立，aVR导联倒置
E.Ⅰ、Ⅱ、Ⅲ、V₁到、V₆导联倒置，aVR导联倒置