若三相电动机有4个线圈并且全部并联，则并联支路数a=( )。
A．2
B．3
C．4
D．6
参考答案：C
表浅且腔壁光滑的巨大空洞（）。
A．浊音或实音
B．鼓音
C．浊鼓音
D．过清音
E．空瓮音
— How about going to school by boat, Lilei?
— Good idea. That must be ______ than taking a bus. [ ]
A. much fun
B. more much fun
C. a lot more fun
D. funner
