题目内容：

How to Look After a Computer?

Many young people use computers, but few of them know how to look after them. Remember the following when you use your computer.

Keep your computer in a cool, dry room. 1. Moisture(潮湿) is also bad for them. Most computers work best at a temperature of 5℃—30℃.

2. Smoke of all kinds is very bad for many parts of a computer and can cause many problems.

3. Pieces of food and even a little water in the keyboard can also cause many problems.

Make sure that the keyboard and screen are the correct height for you. 4.

Make sure the screen is the correct distance(距离) from your eyes. If you wear glasses, make sure these glasses are correct for using the computer. 5.Keep your screen clean and don’t have it too bright. A dirty screen can hurt your eyes. A very bright screen can also be bad for your eyes.

将下列句子的序号填在横线上,使短文完整。

A.Some people use a different pair of glasses when they use a computer.

B.Too much or too little heat(热量) is bad for computers.

C.Don’t eat or drink when you are near your computer.

D.If they are not the correct height, you will get a backache.

E.Don’t let people smoke cigarettes(香烟) near your computer.