已知电路如图,如果输入电压始终等于 -1V,开关S处在闭合位置时,输出电压为( )V; 开关S断开之后1ms时刻, 输出电压为( )V; 开关S断开之后2ms时刻, 输出电压为( )V。 如果输入电压是一个随着时间变化的电压信号 , 开关在 t = 0 时刻断开, 那么在此之后,输出电压与输入电压之间关系是下面哪一个? A B C D
【简答题】I’m sorry but....
I work as a dentist’s assistant and people often say very funny things when they come to see the dentist. Here are some of them.
Roland had an 11 o'clock appointment. He phoned at 1...