A.导程=螺距×线数
B.螺距=导程×线数
C.线数=导程×螺距
A.大径和导程
B.小径和螺距
C.中径和导程
D.大径和螺距
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