224.STM-1帧频8kHz,即每秒传送8000帧;一帧的周期为()。[332050101]

224.STM-1帧频8kHz,即每秒传送8000帧;一帧的周期为()。[332050101]

A.125s

B.225s

C.325s

D.425s

正确答案是A