Computers can injure(伤害)you. Most other injur...

Computers can injure (伤害) you. Most other injuries happen suddenly. For example, if you fall over a bike and break your arms, it happens very ________. But computer injuries happen slowly. You probably know how to ride a bike safely. Now learn to use a computer safely.

Your eyes light can injure your eyes,  never sit too close to a computer screen. Your eyes should be ________ 50centimeters（厘米）on the screen. remember to look away from it. This gives your eyes a rest. When you use a computer, the window ________ 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 ________ 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, ________ these three rules: 1）Rest your wrists on some­thing. 2）Keep your elbows（肘）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 the 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, 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 30 minutes and ________ your arms, legs and neck. ________your computer, but use it safely.

1.A. much quickly      B. faster                 C. slowly              D. quickly

2.A. Too many       B. Too much            C. Much too             D. Many more

3.A. so               B. because      C. but                   D. when

4.A. at last                   B. at most     C. at least         D. less than

5.A. Sometime  B. Some time         C. Some times     D. Sometimes

6.A. can            B. may                       C. must           D. should

7.A. both                B. never      C. all           D. neither

8.A. follow             B. work          C. copy              D. write

9.A. need               B. exercise              C. walk           D. shake

10.A. Enjoy      B. Watch                C. Protect             D. Keep

九年级英语完型填空困难题查看答案及解析

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 at least 50 centimeters（厘米）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 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

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 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 should sit with your back straight. 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 30 minutes and exercise your arms, legs and neck.

Enjoy your computer, but use it safely.

1.A computer screen may injure your eyes if　　　　　 .

A. you sit 60 centimeters away　　 B. you remember to look away

C. your eyes are too close to it　　 D. the window is on your left or right

2.Hand and wrist injuries are caused when you　　　　　 .

A. get plenty of exercise　　 B. move in the same way again and again

C. rest your wrists on something　　 D. keep your elbows as high as the keyboard

3.Your eyes and hands will be safe if　　　　　　 .

A. you work near a window　　 B. you often take rests from working

C. you use a keyboard for a long time　　 D. the window is behind you

九年级英语阅读单选中等难度题查看答案及解析

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 some ways of keeping you away from computer injuries．

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 you move the hands and wrists in the same way hundreds of times. If you use a keyboard for a long time, follow these three rules:

Rest your wrists on something.

Keep your elbows(肘)as high as the keyboard.

Stop sometimes and exercise your hands, wrists and fingers in a different way．

Your back

Some people sit for many hours before a computer. If you sit in the wrong way, you can injure your back or your neck. So you should keep your back straight 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．

九年级英语其他题困难题查看答案及解析

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 some ways of keeping you away from computer injuries．

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 you move the hands and wrists in the same way hundreds of times. If you use a keyboard for a long time, follow these three rules:

Rest your wrists on something.

Keep your elbows(肘)as high as the keyboard.

Stop sometimes and exercise your hands, wrists and fingers in a different way．

Your back

Some people sit for many hours before a computer. If you sit in the wrong way, you can injure your back or your neck. So you should keep your back straight 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．

九年级英语阅读理解极难题查看答案及解析

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．

九年级英语阅读理解中等难度题查看答案及解析

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.

九年级英语阅读单选中等难度题查看答案及解析

Computers can injure 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 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 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 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 (肘部） at the same height as the keyboard. 3) Stop something 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 should sit with your back straight. The top part of the screen should all be in front of your eyes. Your forearms（前臂）, wrists, hands and the upper（上部） part of your legs should all be parallel (平行) to the floor. If you are sitting for a long time, get up every 30 minutes and exercise your arms, legs and necks.

Enjoy your computer, but use it safely.

1.A computer screen may injure your eyes if __________.

A．you sit 60 centimeters away

B．you remember to look away

C．your eyes are too close to it

D．the window is on your left or your right

2.Hand and wrist injuries are caused when you _________.

A．get plenty of exercise

B．move in the same way again and again

C．rest your wrists on something

D．keep your elbows as high as the keyboard

3.Your eyes and hands will be safe if __________.

A．you work near a window

B．you often take a rest from working

C．you use a keyboard for a long time

D．the window is behind you

4.It is good for your back and neck if you sit __________.

A．in the right way

B．for many hours

C．with the screen below your eyes

D．with your back leaning forward

5.What would be the best title for the passage?

A．How to protect your eyes

B．How to protect your hands and wrists

C．How to use a computer safely

D．How to protect your back

九年级英语阅读理解中等难度题查看答案及解析

Computers can injure 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 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 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 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 (肘部） at the same height as the keyboard. 3) Stop something 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 should sit with your back straight. The top part of the screen should all be in front of your eyes. Your forearms（前臂）, wrists, hands and the upper（上部） part of your legs should all be parallel (平行) to the floor. If you are sitting for a long time, get up every 30 minutes and exercise your arms, legs and necks.

Enjoy your computer, but use it safely.

1.A computer screen may injure your eyes if __________.

　A. you sit 60 centimeters away  　 B. you remember to look away

　C. your eyes are too close to it　　  D. the window is on your left or your right　

2. Hand and wrist injuries are caused when you _________.

　A. get plenty of exercise　　       B. move in the same way again and again

　C. rest your wrists on something　  D. keep your elbows as high as the keyboard

3.Your eyes and hands will be safe if __________.

　A. you work near a window　　       B. you often take a rest from working

　C. you use a keyboard for a long time　　D. the window is behind you

4.It is good for your back and neck if you sit __________.

　A. in the right way                           B. for many hours

　C. with the screen below your eyes       D. with your back leaning forward

5. What would be the best title for the passage?

　A. How to protect your eyes            B. How to protect your hands and wrists

　C. How to use a computer safely       D. How to protect your back

九年级英语阅读理解困难题查看答案及解析

Computers can injure 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 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 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 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 at the same height as the keyboard. 3) Stop something 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 should sit with your back straight. The top part of the screen should all 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 30 minutes and exercise your arms, legs and necks.

Enjoy your computer, but use it safely.

1.A computer screen may injure your eyes if __________.

2.Hand and wrist injuries are caused when you _________.

3.Your eyes and hands will be safe if __________.

4.It is good for your back and neck if you sit __________.

5.What would be the best title for the passage?

九年级英语阅读理解困难题查看答案及解析

Computers can injure 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 at least 50cm 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 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 rules: ①Rest your wrists on something. ②Keep your elbows at the same height as the keyboard. ③Stop 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 should sit with your back straight. 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 the parallel (平行) to the floor. If you are sitting for a long time, get up every 30 minutes and exercise your arms, legs and neck.

1.A computer screen may injure your eyes if __________.

A. you sit 60cm away

B. your eyes are too close to it

C. the window is on your left or right

2.Hand and wrist injuries are caused when you __________.

A. move in the same way again and again

B. rest your wrists on something

C. keep your elbows as high as the keyboard

3.When using a computer, your eyes and hands will be safe if you __________.

A. work near a window

B. work for a long time

C. take rests at times

4.It is good for your back and neck if you sit __________.

A. for many hours

B. in the right way

C. with the screen below your eyes

5.What would be the best title for the text?

A. How to Use a Computer Safely

B. How to Keep your Hands and Wrists Safe

C. How to Protect your Eyes and your Back

九年级英语阅读理解困难题查看答案及解析