—Could you tell me __________ yesterday?

—Because my bike was broken on my way here.

A．why you came late

B．why do you come late

C．why you come late

D．why did you come late

蒸发循环制冷系统中蒸发器出口处氟利昂处于（）

A、低压气态

B、高压气态

C、低压液态

D、高压液态