【简答题】三相交流异步电动机的调速可以用改变 ____________ 、 ___________ 和 ___________ 三种方法来实现。
【单选题】¿Le gusta el pueblo?
【简答题】Although the two players are in the tennis court, they are really good friends ________. A) partners B) enemies C) D) companions
【单选题】Le gusta el orden establecido:_____
【多选题】下列关于三相异步交流电动机的叙述中,正确的有______。
B.
直接起动的电流约为额定电流的5~7倍,电动机严重过热,以致烧坏
E.
大功率的三相交流异步电动机可以采用星形—三角形降压启动
【单选题】The two friends are ________ related like the lips and teeth, and you can often see them stay ________ together, hand in hand
【简答题】The two friends are quite _______ each other. (commit)
【简答题】The two friends are _________ with each other in the corner.
【判断题】( ) 1. The two speakers are friends.