.— I'm really angry at my naughty son. He never listens to me and often isagainst me.

— ____, Ellen. Things will go out.

A．It doesn't matter

B．Take your time

C．Don't mention it

D．Take it easy

在紧急制动时，装有103型分配阀的制动机的制动缸具有紧急增压作用。