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 |
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| 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 from the screen. ◆Remember to |
| |
◆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 ◆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. ◆ |
左栏是五位病人的健康问题，右栏是七位专科医生的简介。请根据五位病人的健康问题为他们选出最合适的专科医生诊病，并将答题卡上对应题目所选的选项涂黑。
E. Dr. Wright is always ready to offer help on eating problems. He believes each patient needs a different plan to control his /her wish to eat. |
A driver stopped his car on a street side to have a rest．As he lay down in the seat and closed his eyes, a person came up and knocked at the window to ask the time. The driver opened his eyes and looked at his watch. “It's five past eight.” he said. Then he went to sleep again. But soon he was waken up again because a second person was knocking at the window．“Excuse me, what time is it now？”he asked. The driver looked at his watch again, and told him it was half past eight．
In this way, the driver thought he couldn’t have a good rest, so he wrote a short note and stuck(贴) it on the window for all to see. It said，“I don't know the time．”Again, he lay down in the seat for his sleep. A few minutes later，a third person came and began to knock at the window, “Hey, sir.”he said, “It’s a quarter to nine．”
The driver stopped his car on a street side because he ______.
| A．was very tired | B．saw his friend |
| C．lost his watch | D．didn’t know the time |
The driver was woken up again by the second person ______.
| A．twenty minutes later |
| B．twenty-five minutes later |
| C．thirty minutes later |
| D．thirty-five minutes later |
The driver wrote a short note and stuck it on the window because ______.
| A．he didn't know the time． |
| B．he didn't want anybody to trouble him． |
| C．he wanted somebody to wake him up． |
| D．he wanted somebody to tell him the time． |
The third person knocked at the window to ______．
| A．ask him the time |
| B．ask him not to sleep |
| C．see if the driver was sleeping |
| D．tell him what time it was |
The driver ______ in his car．
| A．had a good sleep |
| B．had no seat |
| C．didn't have a good rest |
| D．always closed his eyes |
Most Americans start to school at the age of five when they enter kindergarten(幼儿园). Children do not really study at this time. They only attend for half the day and learn what school is like. Children attend elementary school for the next six years. They learn to read and write and work with numbers. They also study the world and its people. After they leave elementary school, children go to junior high school for three years and senior high school for another three years. This is called secondary education. In some places, the children go to elementary school for eight years and high school for four. In all, elementary and secondary education together take twelve years to complete excluding （不包括）kindergarten.
根据短文，选择最恰当的选项。（每小题2分，共计10分）
The elementary and secondary education together take the children ____ to complete in the USA.
A. thirteen years B. nine years
C. twelve years D. eleven years
Most American children enter kindergarten _________ .
| A．at the age of five | B．to study two years |
| C．to learn science | D．about two years old |
In elementary school they should stay there ________ .
| A．for six years | B．for three years |
| C．for another three years | D．to study hard |
Children should study how to __________ .
| A．act |
| B．become an astronaut |
| C．read and write |
| D．read, write and work with numbers |
Some American children have their elementary school education for ___ .
| A．five years | B．four years |
| C．eight years | D．seven years |
完形填空
Once there was a father and a son. They were ill-tempered(坏脾气的) and never gave way to .One day the father to ask some friends to dinner in his house. He his son to buy some meat in town. When the son walked towards the town gate, a man was coming from the outside. The gate wasn’t enough to let two men in and out at the same time. But neither of would give way to the other. They stood straight face to face inside the gate hour after hour. But the father was worried. “What shall I do? My son hasn’t yet. I can’t wait any more.” He wanted to know what was the with his son. So he left his friends at home, and went to town his son. “You may first take the home for my friends .Let me here instead.” he said to his son when he knew what had happened.
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