真空沸腾式海水淡化装置一般会在（）时发出声、光警报。

A．真空度太高

B．真空度太低

C．盐水水位太低

D．所产淡水含盐量超过设定值

—_______ the weather _______ today?

—It's cloudy. [ ]

A. What; is

B. What's; like

C. How; is

D. How's; like