Computers can injure (伤害) you. Most other injuries happen suddenly. For example, if you fall off a bike and break your arms, it happens very quickly. But computer injuries happen slowly. You probably know how to ride a bike safely. Now learn to use a computer safely.
Your eyes
Too much light can injure your eyes, so never sit too close to a computer screen. Your eyes should be more than 50 centimeters from the screen. Don’t forget to look away from it sometimes. This gives your eyes a rest.
When you use a computer, the window should be on your left or your right. If it is behind you, the light will reflect on (反射) the screen. If the window is in front of you,the sun and the screen will both shine into your eyes.
Your hands and wrists (手腕)
Hand and wrist injuries can happen because the hands and wrists are moved in the same way hundreds of times.
If you use a keyboard for a long time, follow these three rules:
1) Rest your wrists on something.
2) Keep your elbows (肘) as high as the keyboard.
3) Stop sometimes and exercise your hands, wrists and fingers in a different way.
Your back
Some people sit for many hours in front of a computer. If you sit in the wrong way, you can injure your back or your neck. So you shouldn’t bend your back when you sit. The top part of the screen should be in front of your eyes. Your forearms, wrists, hands and the upper part of your legs should all be parallel (平行) to the floor. If you are sitting for a long time, get up every half an hour and exercise your arms, legs and neck.
Enjoy your computer, but use it safely.
Title: How to use a computer safely
|
Different parts of the body
| Causes of the injuries
| Some ways of keeping you away from computer injuries
|
Eyes
| ◆Too much light can injure your eyes
| ◆Don’t sit too close to a computer screen. ◆Your eyes should be over小题1: from the screen. ◆Remember to小题2: the screen sometimes.
|
小题3:
| ◆You move them in the same way hundreds of times. ◆You use a keyboard for a long time.
| ◆Rest your wrists on something. ◆Keep your elbows at the same height as小题4: . ◆Exercise your hands, wrists and fingers in different ways.
|
Back
| ◆You sit for many hours before a computer. ◆ You sit in the wrong way.
| ◆You should keep your back straight when you sit. ◆小题5: every 30 minutes if you
本试题 “Computers can injure (伤害) you. Most other injuries happen suddenly. For example, if you fall off a bike and break your arms, it happens very quic...” 主要考查您对 问答题 等考点的理解。关于这些考点您可以点击下面的选项卡查看详细档案。
问答题: 主要是根据前提问题来做出相应的要求内的答案,题型比较灵活但是考查了学生多方面的知识和技能。 要做好这类题,就要注意平时知识的积累,包括单词、词组、句型等。
与“Computers can injure (伤害) you. Most other injuries happ...”考查相似的试题有:
|