I have some problems __________ my homework. Could you tell me _____?

A．with; what the height of the mountain is

B．in; what the height of the mountain is

C．with; what is the height of the mountain

D．in; what is the height of the mountain

QOS的典型机制不包括（）

A.内容过滤

B.区别化计费

C.SPAMFILTERING

D.浏览加速