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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) at the same height (高度)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 1.of the body | Causes of the injuries | Some 2. 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 3. 50 centimeters from the screen. ◆ 4. to look away from the screen sometimes. |
5. and wrists | ◆You 6. them in the same way hundreds of times. ◆You use a keyboard for a long time. | ◆ 7. your wrists on something. ◆Keep your elbows as 8. as the keyboard. ◆Exercise your hands, wrists and fingers in different ways. |
Back | ◆You sit for many hours 9. a computer. ◆ You sit in the wrong way. | ◆You should keep your back 10.when you sit. ◆Get up every half an hour if you are sitting for a long time. |
Have you ever studied abroad? Maybe it is an amazing experience, especially when you come to Australia as an foreign high school student. You can have a lot of fun there, especially on holidays.
There are many festivals in Australia. The most important one is Christmas. Each year, the summer holidays at every high school last about two months from the beginning of December to February, which covers the Christmas time. Since it is a long holiday, most foreign students in Australia love to fly back to their home countries to spend the time with their families and friends, but a few students still stay in Australia during the holiday to get part-time jobs. It is quite easy to find a part-time job at Christmas.
Students often take part in another major social activity. They go to the beach to have fun in the sunshine. The summer in Australia is from December to February, so going to the beach in December is very popular among Australians.
Easter in March is another important holiday in the year. It actually combines "Good Friday" and "Easter Monday". Almost every shop closes on Good Friday. And people usually go to see Easter Show.
The Chinese new year is not a public holiday in Australia, so every Chinese student still has to go to school to study and do his or her normal duties.
Information about Australia
Summer holidays | From1._____ to February |
The most popular activity in December | Going to the 2.____ |
Two important holidays | Christmas and 3._____ |
The thing people usually do on Good Friday | Going to see Easter 4._____ |
What to do for a few foreign students in summer | Get a part-time 5.____ |