减速器常用在（）与（）之间，以降低传速或增大转距。
参考答案：原动机；工作机
The Mid-Autumn Day is _____ traditional festival, _____ time when all the families get together and eat
moon cakes. [ ]
A. a; /
B. a; a
C. the; a
D. the; The
基准利率
