题目

Many people can use the computer，but few of them know how to look after them.Remember the following when you use the computer.1Keep your computer in a cool，dry room.Too much heat is bad for computers.2Do not let people smoke near your computer.It is bad for many parts of a computer.3Do not eat or drink when you are near your computer.Pieces of food and a little water in the keyboard are also bad for a computer.4You should often clean your computer and keep the screen clean.5Never use the software(软件)that you don't know about.Because some software may have viruses．If a computer gets v直接写出得数. （1）2×2×2＝（　　） （2）2＋2＋2＝（　　）