【简答题】They ___________ their success by holding a party and the ___________ lasted four hours.(celebrate)
【判断题】非共振荧光的波长大于共振荧光的波长,但小于吸收光的波长。
【简答题】10) 一台 250 r/min , 50Hz 的同步电机,其极数是多少?
【单选题】All the guests at the party were dancing and singing happily _____ the electricity was cut off.
【单选题】The party lasted _____ midnight.
【单选题】—Did you have a good time at the party? —_______ We all enjoyed it so much that it lasted until midnight.