单项选择题
A.同步输出开关B.通道耦合C.通道复制D.频率计测量
A.0.1Hz~25MHzB.1μHz~5MHzC.1Hz~100MHzD.1Hz~200kHz
A.2mV~10VB.2mV~5VC.2mV~3VD.0~30V