【简答题】已知电感的感抗为500欧,流过它的电流有效值为2mA,初相位为60度,则它的电压有效值为( )v,初相位为( )度
【多选题】smartPAD 上的信息窗口可以显示( [填空(1)] )、( [填空(2)] )、( [填空(3)] )、( [填空(4)] )、( [填空(5)] ) 5 种信息类型。
【简答题】SmartPAD上的信息窗口可以显示____、____、_____、_____、_____5种信息类型
【判断题】In
the UK, more than half of the Christians attend worship on a regular basis.
【单选题】Letter boxes are much more in the UK than in the USA, where most people have a mailbox instead. [ ]