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六、阅读理解
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 at 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.
(
A. Because you take a break every 15 minutes.
B. Because you have lower levels of white matter.
C. Because you use screens too much before bedtime.
D. Because you are the people from 13 to 64.
(
A. In a magazine. B. In a travel diary.
C. In a guidebook. D. In a novel.
(
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 at 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.
(
C
)1. Why can't you sleep well according to the passage?A. Because you take a break every 15 minutes.
B. Because you have lower levels of white matter.
C. Because you use screens too much before bedtime.
D. Because you are the people from 13 to 64.
(
A
)2. Where may you read the passage?A. In a magazine. B. In a travel diary.
C. In a guidebook. D. In a novel.
(
B
)3. 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
1—3 CAB
解析
【解析】
1. 细节理解题。根据文章第四段“using screens too much will affect your sleep... about 95％ of the people... use electronics before bed... 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.”可知，睡前过度使用屏幕会导致睡眠不佳，故选C。
2. 推理判断题。本文主要介绍过度使用屏幕对健康的危害，属于健康科普类文章，最可能出现在杂志中，故选A。
3. 主旨大意题。文章从对眼睛、儿童大脑、睡眠三个方面介绍了过度使用屏幕的危害，主旨是过度使用屏幕的危害，故选B。
【答案】
1—3 CAB
【知识点】
阅读理解（细节理解、推理判断、主旨大意）
【点评】
本文是一篇健康科普类说明文，从三个维度介绍了过度使用电子屏幕对健康的危害，题目覆盖了阅读理解常见的三种题型，解题需紧扣原文，定位关键信息分析作答。
【难度系数】
0.6
1. 细节理解题。根据文章第四段“using screens too much will affect your sleep... about 95％ of the people... use electronics before bed... 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.”可知，睡前过度使用屏幕会导致睡眠不佳，故选C。
2. 推理判断题。本文主要介绍过度使用屏幕对健康的危害，属于健康科普类文章，最可能出现在杂志中，故选A。
3. 主旨大意题。文章从对眼睛、儿童大脑、睡眠三个方面介绍了过度使用屏幕的危害，主旨是过度使用屏幕的危害，故选B。
【答案】
1—3 CAB
【知识点】
阅读理解（细节理解、推理判断、主旨大意）
【点评】
本文是一篇健康科普类说明文，从三个维度介绍了过度使用电子屏幕对健康的危害，题目覆盖了阅读理解常见的三种题型，解题需紧扣原文，定位关键信息分析作答。
【难度系数】
0.6
猜出画波浪线单词的词性和中文意思，并收入自己的小词典。
1. eyebrow
2. electronics
1. eyebrow
n. 眉毛
2. electronics
n. 电子设备
答案
1. n. 眉毛 2. n. 电子设备
解析
【解析】
1. eyebrow为名词，中文意思是“眉毛”；2. electronics为名词，中文意思是“电子设备”。
【答案】
1. n. 眉毛 2. n. 电子设备
【知识点】
名词词义识记、常用英语词汇
【点评】
这两个词汇分别属于生活日常类和科技类常用名词，积累这类词汇有助于扩充英语词汇量，提升英语读写与表达能力。
【难度系数】
0.6
1. eyebrow为名词，中文意思是“眉毛”；2. electronics为名词，中文意思是“电子设备”。
【答案】
1. n. 眉毛 2. n. 电子设备
【知识点】
名词词义识记、常用英语词汇
【点评】
这两个词汇分别属于生活日常类和科技类常用名词，积累这类词汇有助于扩充英语词汇量，提升英语读写与表达能力。
【难度系数】
0.6
