登录
B
It might be fun to use your smartphone, but be careful—too much screen time may be harmful to your health.
First, it is bad for your eyes. A researcher called Sarah Hinkley says the problem comes from the blue light that the screen gives out. Looking at a smartphone for a long time can cause eye strain(劳损), headaches and dry eyes. So it is a good idea to take a break every 15 minutes when you are working on a computer or using a smartphone.
Second, screen use can do harm to children's brains. A new study shows that using screens too much can affect how children's brains grow. If children use screens for more than one hour a day, they might have lower levels of white matter in their brains. White matter is a key to the development of language and reading skills. So it is wise to cut down the time of children using all kinds of screens.
Third, using screens too much will affect your sleep. According to a study, about 95% of the people between the ages of 13 and 64 use electronics before bed, especially the young people under 20. Doctors say that the light from those electronics at night may make you excited before you go to bed. Then it's hard for you to get enough sleep. So you'd better turn off smartphones, TVs, and all other screens an hour before your bedtime.
To keep healthy, doctors and researchers strongly advise that you shouldn't use screens for long hours.
()21. The blue light from your screens can cause .
A. eye strain B. headaches
C. dry eyes D. A, B&C
()22. According to the passage, you can't sleep well because you .
A. take a break every 15 minutes
B. have lower levels of white matter
C. use screens too much before bedtime
D. are the people from 13 to 64
()23. What does the underlined word "affect" mean in Chinese?
A. 影响 B. 提高 C. 介绍 D. 理解
()24. You may read the passage in .
A. a magazine B. a travel diary
C. a guidebook D. a novel
()25. What is the main idea of the passage?
A. The ways to keep healthy.
B. The harm of using screens too much.
C. The ways to use screens.
D. The advantages of using screens.
It might be fun to use your smartphone, but be careful—too much screen time may be harmful to your health.
First, it is bad for your eyes. A researcher called Sarah Hinkley says the problem comes from the blue light that the screen gives out. Looking at a smartphone for a long time can cause eye strain(劳损), headaches and dry eyes. So it is a good idea to take a break every 15 minutes when you are working on a computer or using a smartphone.
Second, screen use can do harm to children's brains. A new study shows that using screens too much can affect how children's brains grow. If children use screens for more than one hour a day, they might have lower levels of white matter in their brains. White matter is a key to the development of language and reading skills. So it is wise to cut down the time of children using all kinds of screens.
Third, using screens too much will affect your sleep. According to a study, about 95% of the people between the ages of 13 and 64 use electronics before bed, especially the young people under 20. Doctors say that the light from those electronics at night may make you excited before you go to bed. Then it's hard for you to get enough sleep. So you'd better turn off smartphones, TVs, and all other screens an hour before your bedtime.
To keep healthy, doctors and researchers strongly advise that you shouldn't use screens for long hours.
()21. The blue light from your screens can cause .
A. eye strain B. headaches
C. dry eyes D. A, B&C
()22. According to the passage, you can't sleep well because you .
A. take a break every 15 minutes
B. have lower levels of white matter
C. use screens too much before bedtime
D. are the people from 13 to 64
()23. What does the underlined word "affect" mean in Chinese?
A. 影响 B. 提高 C. 介绍 D. 理解
()24. You may read the passage in .
A. a magazine B. a travel diary
C. a guidebook D. a novel
()25. What is the main idea of the passage?
A. The ways to keep healthy.
B. The harm of using screens too much.
C. The ways to use screens.
D. The advantages of using screens.
答案
21. D
22. C
23. A
24. A
25. B
22. C
23. A
24. A
25. B
解析
21. 定位文章第二段，文中明确指出长时间看电子屏幕会引发眼劳损、头痛和干眼症，A、B、C三个选项均符合描述，故选D。
22. 根据文章第四段内容，睡前过度使用电子屏幕会使人神经兴奋，进而导致睡眠不佳，对应选项C。
23. 结合语境“过度使用屏幕会______儿童大脑的发育”，可推断“affect”的中文含义为“影响”，故选A。
24. 本文是健康科普类文章，这类内容通常会刊载在杂志中；旅行日记、指南手册、小说均不符合文章类型，故选A。
25. 文章从眼睛健康、儿童大脑发育、睡眠三个方面阐述了过度使用屏幕的危害，主旨为过度使用电子屏幕的害处，故选B。
22. 根据文章第四段内容，睡前过度使用电子屏幕会使人神经兴奋，进而导致睡眠不佳，对应选项C。
23. 结合语境“过度使用屏幕会______儿童大脑的发育”，可推断“affect”的中文含义为“影响”，故选A。
24. 本文是健康科普类文章，这类内容通常会刊载在杂志中；旅行日记、指南手册、小说均不符合文章类型，故选A。
25. 文章从眼睛健康、儿童大脑发育、睡眠三个方面阐述了过度使用屏幕的危害，主旨为过度使用电子屏幕的害处，故选B。
