题目内容
What three letters mean twenty-six letters?
What three letters turn a girl into an old woman?
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Do you think about how you take care of yourself as you work at your computer? Many people work on computers for a long time every day，and students work on computers more and more．This can be unhealthy．
If you get a headache，you’ve probably spent too long looking at your computer，so take a break every hour．It’s important to get up and take some exercise．Go outside and get some fresh air．
Is your desk all right? The way you sit at your computer is very important．You should sit straight at the correct distance from your computer．Check that your computer，your desk and your chair are all in the right place for you to sit higher than the keyboard．
Your hands and arms can suffer（受损害）as a result（结果）of working too long．Many people’s aims and hands get hurt if they work for too long at the computer．You can do special exercises for this．If you hurt yourself，it might take a long time to get better．
1．How often should you move away from your computer?
2．Why do you need to take a break from your computer?
3．What three things do you need to put in the fight place?
4．What can you do to stop your hands and arms from getting hurt?
