题目内容
16．Using a mobile phone before going to bed can damage your health，according to a major study．It says that radiation from the mobile phone can cause insomnia（失眠症） and headaches as well as cutting the time spent in deep sleep．Failing to get enough sleep can lead to depression，lack of concentration and personality changes．In teenagers and young children，lack of sleep can result in attention disorders and poor grades．
The research showed that using mobile phones before bed causes people to take longer to reach the deeper stages of sleep and to spend less time in them．
Deep sleep is important as it is the time when the body rejuvenates（更新） cells and repairs damage suffered during the day．Scientists found that using mobile phones an hour before sleep affects it．In the study scientists examined the sleep patterns of 36women and 35men aged 18to 45．Some were exposed to radiation that is similar to what a person receives when using a mobile phone．The others received none．The results are as follows：The first group took longer to enter the first of the deeper stages of sleep and spent less time in the deepest one．However，the second group was opposite．
The findings will shock many parents．Many parents are always worried about their children's health．But they didn't have a better way to persuade them not to use a mobile phone．
28．The passage mainly tells us aboutB．
A．deep sleep is good for your health
B．using a mobile phone before sleep can damage your health
C．different people have different sleep patterns
D．long sleep can renew cells
29．The underlined word"it"refers toC．
A．people's body
B．a sleep pattern
C．deep sleep
D．a day
30．Which of the following is NOT mentioned in the passage？C
A．Deep sleep is a good time for the body to repair damage suffered during the day
B．The study examined the sleep patterns of about 70people．
C．The findings shocked many teachers and teenagers．
D．Using mobile phones before bed causes people to take longer time to enter the deep sleep．
31．We can infer from the passage thatA．
A．many children use mobile phones before sleep
B．radiation from the mobile phone can cause parents'worries
C．the lack of sleep can lead to children's excitement
D．using a mobile phone before sleep doesn't harm the aged．
分析 本文主要讲述了睡觉前使用手机对人的身体有极大的坏处，并描述了其原因．
解答 28．B 归纳题．根据文章内容尤其是主题段Using a mobile phone before going to bed can damage your health，according to a major study．一项调查研究显示：睡觉前使用手机是会对身体造成损坏的，后文对该话题进行了详细的描述，结合选项，故选B
29．C 词义猜测题．根据文章内容，Deep sleep is important as it is the time when the body rejuvenates（更新） cells and repairs damage suffered during the day．Scientists found that using mobile phones an hour before sleep affects it．科学家说；深度睡眠是非常重要的，因为在那期间身体要更新细胞并且修复白天受损的身体．但是，睡觉前使用手机会对深度睡眠有影响，结合选项，故it指代的应是deep sleep
30．C 细节题．根据文章内容，The findings will shock many parents．研究结果使得很多家长吃惊，而不是老师和家长，结合选项，故选C
31．A 推理题．根据文章内容，Many parents are always worried about their children's health．But they didn't have a better way to persuade them not to use a mobile phone．家长们担心孩子的健康问题，但是又找不到更好的方法劝他们少用手机，由此可知，现在的孩子常在睡觉前用手机，故选A
点评 本文是一个科教类阅读，题目涉及多道细节理解题，做题时结合原文和题目有针对性的找出相关语句进行仔细分析，结合选项选出正确答案．推理判断题也是要在抓住关键句子的基础上合理的分析才能得出正确答案，切忌胡乱猜测，一定要做到有理有据．
