【简答题】When I (arrived/was arriving), the party was in full swing. Paul was dancing with Mary, and Pat and Peter were drinking champagne.
【简答题】The Labour Party was the first party in Britain that______.
【单选题】变频器调速过程中,为了保持磁通恒定,必须保持( )。
【单选题】变频器调速过程中,为了保持磁通恒定,必须保持( )
【单选题】船舶的横摇周期是指( )1船舶横摇四个连续摆幅所需要的时间;2船舶从左舷横摇到右舷所需要的时间;3船舶横摇一个全摆程所需要的时间
【多选题】变频调速过程中,为了保持磁通恒定,必须保持()
【判断题】变频器调速过程中,为了保持磁通恒定,必须保持U/F=常数。
【简答题】The party was in _______ _________ when the police burst in. 晚会正进行得热火朝天的时候,警察闯了进来。
【单选题】变频器调速过程中,为了保持磁通恒定,必须保持