Question

Computers can injure you. Most other injuries happen suddenly. For example, if you fall off a bicycle and break your arm, it happens very quickly. But computer injuries happen slowly.

Your eyes

Too much light can injure your eyes, so never sit too close to a computer screen. Your eyes should be at least 50 centimeters from the screen. Remember 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(反射) on the screen. If the windows 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 times, follow these three rules:  1) Rest your wrists on something.  2) Keep your elbows at the same height 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 a wrong way, you can injure your back or your neck. So you should sit with your back straight. The top part of the screen should be in front of your eyes. Your forearms(前臂), wrists and hands should all be parallel to(与......平衡) the floor. If you are sitting for a long time, get up every 30 minutes and exercise your arms, legs and neck.

Enjoy your computer, but use it safely.

1.The underlined word “injure” means “        .”

A. 保护    B. 影响    C. 伤害    D. 帮助

2.Your eyes should         .

A. be close to the screen    B. be less than 50 centimeters from the screen

C. face the window    D. be more than 50 centimeters from the screen

3.To protect your hands and wrists you should         .

A. Keep your elbows above the height of the keyboard

B. Keep your wrists hanging without touching anything

C. Keep your elbows below the height of the keyboard

D. Stop playing computer sometimes and exercise

4.Which of the following is true?

A. Sitting wrongly is only bad for your wrists and fingers.

B. Your eyes should be at the same height as the top part of the screen.

C. You should have a rest every two hours.

D. You should sit in front of a screen and play computer for a long time.

5.Which is the best title of this passage?

A. How to Use a computer Safely.    B. How to Play Computer Games.

C. How to Protect Your Eyes.    D. Computers Are very Harmful.

Answer

1.C

2.D

3.D

4.B

5.A

【解析】文章大意：这篇短文主要介绍了电脑伤害不是突然发生的而是慢慢形成的，所以我们要学会安全地使用电脑。文章介绍了电脑对眼睛、手及手腕、背部的伤害以及具体防护办法。

1.细节理解题。根据下文But computer injuries happen slowly.但是电脑的伤害是慢慢发生的，可知这里是说：电脑可以“伤害”你，所以“injure”意思是“伤害”，故答案选C。

2.细节理解题。根据下文Your eyes should be at least 50 centimeters from the screen.可知，你的眼睛应该距离屏幕至少50厘米，故答案选D。

3.细节理解题。根据下文Stop sometimes and exercise your hands, wrists and fingers in a different way.可知，为了保护你的手和手腕，你应该停止玩电脑并锻炼你的手和手腕，结合选项，故答案选D。

4.推理判断题。根据If you sit in a wrong way, you can injure your back or your neck.可知，如果你的坐姿错误，就会伤到背部或脖子，而不是对手腕和手指造成伤害，所以A选项错误；根据The top part of the screen should be in front of your eyes.可知，电脑屏幕的上部应该在你的眼睛前面，即眼睛应该和电脑屏幕的顶端高度相同，所以B选项正确；根据Remember to look away from it sometimes. This gives your eyes a rest.和If you are sitting for a long time, get up every 30 minutes and exercise your arms, legs and neck.可知要不时的把目光移开屏幕让眼睛休息，如果坐的时间长了要每30分钟站起来活动，而不是每两个小时休息一次，所以C选项错误；根据If you are sitting for a long time, get up every 30 minutes and exercise your arms, legs and neck.可知，如果你坐了好长时间，应该每30分钟站起来活动你的胳膊、腿和脖子，而不是长时间的坐在屏幕前玩电脑，所以D选项错误。本题问哪一项是正确的，故答案选B。

5.主旨大意题。根据文章中介绍了电脑对眼睛、手及手腕、背部的伤害以及具体防护办法，以及最后的总结Enjoy your computer, but use it safely.享受你的电脑，但要安全使用；可知本文主要告诉我们如何安全使用电脑，结合选项，故答案选A。