The white trousers are nice. Can I _____? [ ]

A. try it on

B. try on it

C. try them on

D. try on them

下列因素不会造成发动机功率不足的是：（）

A、增压前的进气接管裂 

B、增压后的进气接管裂 

C、空滤堵 

D、进气温度高