【单选题】We ______ hurry because we still had a lot of time.
【判断题】一台50Hz的变压器接到60Hz的电网上,外施电压的大小不变,励磁电流将减小。( )
【简答题】Hurry! Time to “steal vegetables” Don't be afraid! We are not encouraging the stealing behavior, but to tell you maybe the most popular topic from white-collars' mouth in cities. Together with 'How ma...
【单选题】If you don't hurry up ,the train _____ by the time we get to the station .
【单选题】一台50Hz的变压器接到60Hz的电网上,外时电压的大小不变,激磁电流将()。