There is a light in the room. Can I _____? [ ]

A. to turn it on

B. to turn on it

C. turn it on

D. turn on it

工具、器具及生产家具购置费一般通过（）计算。

A.原价+运杂费

B.原价×(1+运杂费率)

C.原价×(1+运杂费率)×(1+损耗率)

D.设备购置费×定额费率