双速单绕鼠笼式感应电动机用改变电动机（）实现两种速度转换。 A.驱动电压 B.磁极对

短语填空（注意形式）（每个2分, 共10分.）

	refer to … as …          in respond to         be different from     on average             consist of            make a difference

 

 
小题1:This club _________________ more than 200 members.
小题2: It could _________________ between missing your train and getting to work on time.
小题3:_________________their hospitality, we wrote a thank-you note.
小题4: In China, men still earn more than women _________________.  
小题5:He doesn’t like to be called Tom, but prefers to _________________ 'Doctor Khee'.