单项选择题Of the night her husband _________ seven years ago, she wrote: “From that evening on, there would never be another easy moment between us …” ( )
单项选择题NPN型BJT共射极放大电路的交流输出波形上半周失真时为_______，此时应该_______基极电流。A. 饱和失真，减小B. 饱和失真，增大C. 截止失真，增大D. 截止失真，减小
