Question

14．There's nothing like a good night's sleep-but what does that really mean？It turns out that the answer depends not only on your age，but also on your lifestyle．Some people are productive and happy with fewer hours of sleep，while others need more．Still，experts can determine guidelines that work for most people．The National Sleep Foundation researched the topic and gave new recommendations this week．The foundation acknowledges that sleep needs will vary-lifestyle and stress should be taken into consideration-but their recommendations offer a general guideline．For example，teenagers （ 14-17 years old） ne 8-10 hours，sleep every day．
To create the recommendations，some sleep and medical experts reviewed 312 articles from journals published during the last decade．This is the first time that any professional organization has developed age-specific recommended sleep durations based on a systematic review of the world scientific literature．
A lack of sleep can be linked to weight gain，because that causes an increase in appetite，according to the foundation．It can also have serious consequences on the brain．People who d o not get enough sleep are at increased risk for depression，and can endanger others．Those that become sleepy while driving，for example，risk both their lives and the lives of those around them．
Researchers also have found in the past that too much sleep can have negative effects．Low socioeconomic status and depression reportedly are significantly associated with longer sleep．However，experts nowadays find that research on oversleeping is still unconvincing and needs more attention．Currently，there is no strong evidence that sleeping too much has health consequences．There is，however，laboratory evidence that short sleep durations of four to five hours have negative consequences．We need similar laboratory studies to determin e whether long sleep durations result in physiological changes that could lead to disease before we make any recommendations against sleep extension．
 
41．Which is TRUE about sleeping time？A
A．The time you need for sleep is related to your state of mind．
B．Experts'guideline for sleeping time applies to all the people．
C．The less you sleep，the more productive you are．
D．The more you sleep，the more energetic you are．
42．How did die National Sleeping Foundation do the research？B
A．By interviewing different people．B．By reading lots of articles．
C．By consulting other experts．D．By doing systematic experiments．
43．The research shows that people without enough sleep willB
A．lose some weight                                       
B．eat more food  
C．dream during their sleep                             
D．drive faster than usual
44．From Paragraph 4，we can learn thatC．
A．too much sleep may result in social changes   
B．researchers now agree with those ill the past
C．more research on oversleeping is needed      
D．research on oversleeping is quite convincing
45．From which section of a newspaper is the passage most probably taken？A
A．Health
B．Psychology    
C．Sport
D．Education．

Answer 1

分析 本文是一篇说明文阅读，主要讲述了睡眠对健康的重要性．人们所需要的睡眠时间不仅与年龄有关，还与生活方式有关．缺乏睡眠会导致食欲增加从而导致体重增加，还可能对大脑产生严重的后果，增加抑郁的风险．

解答 41．A 理解推断题．根据第一段It turns out that the answer depends not only on your age，but also on your lifestyle．Some people are productive and happy with fewer hours of sleep，while others need more．可知人们所需要的睡眠时间不仅与年龄有关，还与心理状态有关．故选A．
42．B 细节理解题．根据第二段To create the recommendations，some sleep and medical experts reviewed 312 articles from journals published during the last decade．可知国家睡眠基金会是阅读很多文章后做的研究．故选B．
43．B 细节理解题．根据第三段A lack of sleep can be linked to weight gain，because that causes an increase in appetite，according to the foundation．可知没有足够睡眠的人吃的会多．故选B．
44．C 细节理解题．根据第四段However，experts nowadays find that research on oversleeping is still unconvincing and needs more attention．可知对于睡眠过多还需要做更多的研究．故选C．
45．A 主旨大意题．本文主要讲述了睡眠对健康的影响，这是与健康有关的文章．故选A．

点评 本文考察学生的理解推断能力以及细心程度，只要抓住文章的关键词，采用寻读的方法查找细节，就能找到正确答案．