【简答题】某车间有A、B、C、D四台发电机,今要求(1)A必须开机(2)其他三台电动机中至少有两台开机,如不满足上述要求,则指示灯熄灭,试设计逻辑电路图。
【简答题】某车间有A、B、C三台发电机,今要求(1)A必须开机(2)其他两台电动机中至少有一台开机,如不满足上述要求,则指示灯熄灭。试用与非门完成此电路。
【单选题】There was something _______in the way he smiled.
【单选题】A sparkle in his eyes ____ his face whenever he smiled.
【判断题】HXD3C电力机车无火回送操作时,手动缓解停放,确认制动夹钳与制动盘有间隙。
【单选题】When he knew that he had passed the driving test, he smiled _______.
【简答题】He smiled in ________________. Obviously he was very pleased with what he had done. (satisfy)
【简答题】He smiled in ____________. Obviously he was very pleased with what he had done. (satisfy)
【单选题】在OSI模型中,将网络功能划分层数是()。