[名词解释] 潜伏期

衔接 标准心电图纸上最小的方格为() ["A．0.1mm","B．1mm","C．0.2mm","D．2mm","E．0.4mm"] 缩复作用 QRS波群的正常值为() ["A．0.1～0.2秒","B．0.06～0.1秒","C．0.6～0.2秒","D．0.01～0.1秒","E．0.02～0.06秒"] 活跃期 潜伏期