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安徽省安庆市大观区2019-2020学年八年级下学期英语期中测试题

作者UID:7189882
日期: 2024-09-19
期中考试
单项选择(本大题共15小题,共15分)
完型填空(本大题共20小题,共20分)
完形填空

    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 very1. But computer injuries happen slowly. You probably know how to ride a bike safely. Now learn to use a computer safely.

    Your eyes

    2light can injure your eyes,3never sit too close to a computer screen. Your eyes should be450 centimeters(厘米)from the screen.5remember to look away from it. This gives your eyes a rest. When you use a computer, the window6be 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,7the 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,8these 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 and9your arms, legs and neck.10your computer, but use it safely.

补全对话(有两项是多余的)(本大题共5小题,共5分)
阅读理解(本大题共20小题,共40分)
阅读理解

    Spending two or three hours playing outdoors each day can reduce the chance of becomingshort-sighted, a research shows. It challenges the belief(信念)that short-sightedness is caused by computer use,watching TV or reading in weak light.

    The Australian government researchers believe that the sunlight is good for people's eyes. They compared the vision(视力)and habits of 100 seven-year-old children in Singapore and Australia. In all, 30% of the Singaporean children were short-sighted-this rate(比率)was ten times higher than Australian children.

    Both groups spend a similar amount of time reading,watching television and playing computer games. However the Singaporean children spent an average of only half an hour a day outdoors-90 minutes less than the Australian children.

    Professor Lan Morgan, from the Australian Research Council's vision Centre, said, "Humans are naturally long-sighted, but when people begin to go to school and spend little or no time outdoors, the number of short-sighted people gets larger. We're also seeing more and more short-sighted children in cities all around the world and the main reason may be that city children spend less time outdoors.

    Daylight can be hundreds of times brighter than indoor light. But why does playing outside prevent us from becoming short-sighted?Scientists believe that natural light has a special chemical(化学物质)which stops the eyeball from growing out of shape and prevents people from becoming short-sighted.

    So be outdoors. It doesn't matter if that time is spent having a picnic or having sports.

单词拼写(本大题共5小题,共15分)
书面表达(本大题共1小题,共15分)
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