题目内容
Smart Phone, Poor Sight
Look around and you’ll see people busy on their smart phones. Smart phones do make our lives easier. But have you ever thought about what they mean to your eyes?
According to a study, half of British people own smart phones now and they spend an average of two hours a day using them. There has been a 35% increase in the number of people in the UK who suffer from short-sightedness since smart phones were introduced there in 1997.
Staring (盯) at smart phones screen for long time gives you dry eyes. When looking at something in the distance, your eyes automatically blink (自动眨眼) a certain number of times. However, when you look at things closer to your face, the blinking slows down. This reduces the amount of tears and causes discomfort in your eyes. Another bad habit is using smart phones in dark rooms before going to sleep. If you look at a bright screen while your pupils (瞳孔) become larger, too much light enters your eyes. This can do harm to the eyes and cause a disease called glaucoma (青光眼).
While you’re probably not going to stop using your smart phone, there are a few things you can do to protect your eyes. Hold your phone at least 30 centimeters away from your eyes when using it. Take a break every hour and try the following: look at something at least five meters away from you and then focus on the tip of your nose. Repeat this several times. It should reduce the discomfort in your eyes.
1.The article is mainly about ________.
A. how to use smart phones
B. the harm that smart phones do to users’ eyes
C. the reason why teenagers get short-sightedness
D. advantages and disadvantages of smart phones
2.From Paragraph 2，we learn that ________.
A. half of the British people began to use smart phones 22 years ago
B. each of the British people spends two hours a day on smart phones
C. more British people have suffered from short-sightedness since 1997
D. the number of British people who own smart phones increases by 35%
3.Using smart phones improperly may cause ________.
A. too many blinks B. more tears in the eyes
C. smaller pupils D. dry eyes and glaucoma
4.If you use your eyes for a long time, which of the following is not a good way to relax?
A. Holding your phone at least 30 centimeters away from your eyes.
B. Taking a break every hour.
C. Sleeping for an hour.
D. Trying to look at something in the distance.
5.This article is written to advise people ________.
A. not to buy smart phones B. to stop using smart phones
C. to make full use of smart phones D. to use smart phones properly
