单项选择题
A.＜0.15s B.＜0.05s C.≤0.11s D.≤0.20s
A.Ⅰ、Ⅱ、Ⅲ、V1-V3V7-V9 B.Ⅰ、Ⅱ、Ⅲ、V3R-V5R、V1-V6 C.Ⅰ、Ⅱ、Ⅲ、AvR、AvL、AvF、V1-V6 D.AvR、AvL、AvF、V1-V6、V1-V6
A.Ⅰ、Ⅱ、Ⅲ B.V1-V6 C.AvR、AvL、AvF D.Ⅰ、Ⅱ、Ⅲ、AvR、AvL、AvF