Questions 1-4

What does the speaker recommend if you do not want to drink much water during the flight？（）

A．Avoid junk food, salty foods, caffeine and alcohol.

B．Drink as little water as possible between meals.

C．Take drinks with less sugar, carbonation or caffeine.

D．Always have other fluid on the plane.

计算机病毒的危害主要有（）。

A.攻击内存

B.攻击文件

C.攻击磁盘

D.攻击CMOS

E.干扰系统运行