迟滞比较器的回差电压△U是指()
A.正向阈值电压与负向阈值电压之差
B.最大输出正电压与负电压之差
C.最大输入电压最小输入电压之差
D.输出电压与输人电压之差
参考答案:A
—Do you think you can repair the car by yourself?
—______. It's not the first time for me.[ ]
A. Don't worry
B. Hurry up
C. Sorry, I can't
D. Not at all