用所给词的适当形式填空。

1. When is ______ (sally) birthday party?

2. December is the ______ (twelve) month of a year.

3. Mary's birthday is August _______ (eight).

4. Look at the photos of these famous _______(people).

5. There are twenty _______ (class) in our school.

采用先进夹具，不但能大大减少辅助时间，还能缩减基本时间。若采用连续加工夹具或多位夹具，可使零件的基本时间与辅助时间（），从而提高劳动生产率。

A.相异

B.相差

C.相反

D.基本重合