--- Do you know Anna’s telephone number?

--- ______. As a matter of fact, I don’t know any Anna, either.

A．I think so

B．I hope so

C．I’d rather not

D．I am afraid not

一般来说，表示声音的质量越高，则（）。

A、量化位数越多和采样频率越低

B、量化位数越少和采样频率越低

C、量化位数越多和采样频率越高

D、量化位数越少和采样频率越高