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二、阅读短文，回答问题
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 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 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:
• Rest your wrist on something.
• Keep your elbows at the same height as the keyboard.
• 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 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. Do computer injuries happen quickly?
2. Where should the window be when you use a computer?
3. Why do hand and wrist injuries always happen?
4. How often do you need to get up and exercise your arms, legs and neck?
5. What is the text mainly about?
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 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 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:
• Rest your wrist on something.
• Keep your elbows at the same height as the keyboard.
• 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 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. Do computer injuries happen quickly?
No, they don't.
2. Where should the window be when you use a computer?
On your left or your right.
3. Why do hand and wrist injuries always happen?
Because the hands and wrists are moved in the same way hundreds of times.
4. How often do you need to get up and exercise your arms, legs and neck?
Every 30 minutes.
5. What is the text mainly about?
How to use a computer safely.
答案
1. No, they don't.
2. On your left or your right.
3. Because the hands and wrists are moved in the same way hundreds of times.
4. Every 30 minutes.
5. How to use a computer safely.
2. On your left or your right.
3. Because the hands and wrists are moved in the same way hundreds of times.
4. Every 30 minutes.
5. How to use a computer safely.
解析
【分析】
本题为英语阅读理解题，包含细节理解题和主旨大意题。解题思路为：先通读全文明确各段落主题，再针对每个问题精准定位原文对应段落的关键信息，最后根据问题类型（一般疑问句、特殊疑问句）组织答案，确保答案与原文一致。
【解析】
1. 问题为一般疑问句，定位原文第一段最后一句“But computer injuries happen slowly.”，可知电脑伤害发生缓慢，故回答No, they don't.
2. 问题询问使用电脑时窗户的位置，定位原文“Your eyes”部分第二段第一句“When you use a computer, the window should be on your left or your right.”，直接提取答案。
3. 问题询问手和手腕受伤的原因，定位原文“Your hands and wrists”部分第一句“Hand and wrist injuries can happen because the hands and wrists are moved in the same way hundreds of times.”，直接提取原因。
4. 问题询问起身锻炼的频率，定位原文“Your back”部分最后一句“If you are sitting for a long time, get up every 30 minutes and exercise your arms, legs and neck.”，提取频率Every 30 minutes.
5. 问题询问文章主旨，全文围绕安全使用电脑的方法展开，故归纳为How to use a computer safely.
【答案】
1. No, they don't.
2. On your left or your right.
3. Because the hands and wrists are moved in the same way hundreds of times.
4. Every 30 minutes.
5. How to use a computer safely.
【知识点】
英语阅读理解、细节理解、主旨归纳
【点评】
本文是一篇关于安全使用电脑的实用英语短文，题目以细节查找为主，辅以主旨归纳，考查学生快速定位信息和归纳总结的能力，整体难度较低，认真阅读原文即可正确作答。
【难度系数】
0.2
本题为英语阅读理解题，包含细节理解题和主旨大意题。解题思路为：先通读全文明确各段落主题，再针对每个问题精准定位原文对应段落的关键信息，最后根据问题类型（一般疑问句、特殊疑问句）组织答案，确保答案与原文一致。
【解析】
1. 问题为一般疑问句，定位原文第一段最后一句“But computer injuries happen slowly.”，可知电脑伤害发生缓慢，故回答No, they don't.
2. 问题询问使用电脑时窗户的位置，定位原文“Your eyes”部分第二段第一句“When you use a computer, the window should be on your left or your right.”，直接提取答案。
3. 问题询问手和手腕受伤的原因，定位原文“Your hands and wrists”部分第一句“Hand and wrist injuries can happen because the hands and wrists are moved in the same way hundreds of times.”，直接提取原因。
4. 问题询问起身锻炼的频率，定位原文“Your back”部分最后一句“If you are sitting for a long time, get up every 30 minutes and exercise your arms, legs and neck.”，提取频率Every 30 minutes.
5. 问题询问文章主旨，全文围绕安全使用电脑的方法展开，故归纳为How to use a computer safely.
【答案】
1. No, they don't.
2. On your left or your right.
3. Because the hands and wrists are moved in the same way hundreds of times.
4. Every 30 minutes.
5. How to use a computer safely.
【知识点】
英语阅读理解、细节理解、主旨归纳
【点评】
本文是一篇关于安全使用电脑的实用英语短文，题目以细节查找为主，辅以主旨归纳，考查学生快速定位信息和归纳总结的能力，整体难度较低，认真阅读原文即可正确作答。
【难度系数】
0.2
