【单选题】在一电压恒定的直流电路中,电阻值增大时,电流()
【单选题】ZD6-D型转辙机采用直流串激式电动机,它的 额定电流为 ( ) 。
【单选题】听力原文: Prison service staff here in Britain has been severely criticized in an official report for escape of five Iraqi prisoners and an armed robber from Whitewall Prison in Kenbershire. Bomb-making e...
【单选题】National Health Service in Britain is only free for _________.
【多选题】《饲料和饲料添加剂管理条例》中,把饲料分为( )。
【单选题】---I’m going to Britain? ---How long _________ you _______ in Britain?
【简答题】ZD6-A型电动转辙机的额定负载、额定直流电压、动作电流、转换时间、动作杆动程、表示杆动程、主锁闭力应符合哪些要求?
【单选题】听力原文:Thank you for calling the Britain information service. If you'd like information about train times, please press 1. If you' d like to book a ticket, please press 2. If you want information about ...
A.
An engineering company
【单选题】在一电压恒定的直流电路中,电阻值增大时,电流( )。
【多选题】下列属于ZD6型电动转辙机的技术参数的是()。