Please stop________ . I can’t hear __________ .

A．making any noise; what did the man say

B．to make any noise; what the man spoke

C．making any noise; what the man said

D．to make a noise; what the man talked with

接触线工作支坡度当列车运行速度不超过120km/h时，其标准值一般不超过（）。