A 56Kbps Modem is a device that translates the （）signals from your computer into analog signals that can travel over a standard phone line,and it can sends data at 56,000 bits per second.

A．mouse

B．voice

C．analog

D．digital

气体的溶解度与下列因素有关的是（）。

A、温度的高低

B、压力的大小

C、溶质或溶剂的种类

D、溶质或溶剂的多少