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精英家教網(wǎng) > 初中英語 > 題目詳情

Why don’t you an English club to practice English?

A. to join；to speak B. join；speaking

C. join；to speak D. to join；speaking

【解析】

試題分析：句意為：你為什么不加入英語俱樂部來練習(xí)說英語呢？“Why don’t you+動詞原形？”表示提建議，practice后接動詞ing形式，表示練習(xí)做某事。結(jié)合選項(xiàng)可知應(yīng)選B。

考點(diǎn)：考查非謂語動詞。

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Computers can injure (傷害) 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
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 over1. from the screen. ◆Remember to2. the screen sometimes.
3.	◆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 as4. . ◆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. ◆5. every 30 minutes if you are sitting for a long time.