John studied very hard last year.  ______________.

A．So was his deskmate.

B．So his deskmate was.

C．So did his deskmate.

D．So his deskmate did.

编制概算时，应用本定额算出定额直接费和基价定额直接费后（）。

A.即可应用

B.乘以扩大系数

C.乘以折减系数

D.分别不同情况分别乘以系数