题文
阅读理解。 Judging from recent surveys,most experts in sleep behaviour agree that there is virtuallyan epidemic (流行病) of sleepiness in the nation."I can't think of a single study that hasn't
found Americans getting less sleep than they ought to," says Dr David.Even people who
think they are sleeping enough would probably be better off with more rest.
The beginning of our sleepdeficit crisis can be traced back to the invention of the light
bulb a century ago.From diary entries and our personal accounts from the 18th and 19th
centuries,sleep scientists have reached the conclusion that the average person used to sleep
about 9.5 hours a night."The best sleep habits once were forced on us,when we had nothing
to do in the evening down on the farm,and it was dark." By the 1950s and 1960s,the sleep
schedule had been reduced dramatically,to between 7.5 and 8 hours,and most people had
to wake to an alarm clock."People cheat in their sleep,and they don't even realize they're
doing it," says Dr David."They think they're okay because they can get by on 6.5 hours,
when they really need 7.5,8 or even more to feel ideally energetic."
Perhaps the most merciless robber of sleep,researchers say,is the complexity of the day.
Whenever pressures from work,family,friends and community increase,many people
consider sleep the least expensive item on their programme."In our society,you're considered
dynamic if you say you need only 5.5 hours' sleep.If you've got to get 8.5 hours,people
think you lack drive and ambition."
To determine the consequences of sleepdeficit,researchers have put subjects through a
set of psychological and performance tests requiring them,for instance,to add columns of
numbers or recall a passage read to them only minutes earlier."We've found that if you're in
sleepdeficit,performance suffers," says Dr David."Shortterm memory is weakened,as are
abilities to make decisions and to concentrate."1．What is the main topic of the passage?_____A．Research on the causes and consequences of sleepdeficit.
B．The epidemic of sleepiness in the modern times.
C．The history of people's sleeping patterns.
D．The minimum of our sleeping hours.2．Which of the following is Dr David's opinion?_____A．People who think they are sleeping enough are better off than those who don't.
B．Some people can remain energetic with only 6.5 hours' sleep a night.
C．If they get 8.5 hours' sleep,people will be full of drive and ambition.
D．People's mental power suffers if they are lacking in sleep.3．People in the 18th and 19th centuries slept about 9.5 hours a night because ________.A．they were forced by their parents to do so
B．they knew what was best for their health
C．they had no electricity
D．they were not so dynamic and ambitious as modern people are4．The major cause of sleepdeficit of modern people is ________.A．the endless TV programmes in the evenings and the Internet
B．the pressures of the day
C．the sufficient energy modern people usually have
D．loud noises in modern cities5．What does the word "subjects" in Paragraph 4 mean?______.A．Persons or things being discussed or described.
B．Branches of knowledge studied in a school.
C．Persons or things being treated in a certain way or being experimented on.
D．Any member of a state apart from the supreme ruler. 题型：未知难度：其他题型
答案
1-5ADCBC解析
该题暂无解析
考点
据考高分专家说，试题“阅读理解。 Jud.....”主要考查你对 [健康环保类阅读 ]考点的理解。健康环保类阅读
健康环保累阅读概念：
健康环保类文章常是介绍科学知识、生活常识和环境保护方面的短文。体裁有记叙文、 说明文、议论文和各种应用文。
健康环保类文章阅读技巧：
健康环保类文章常是介绍科学知识、生活常识和环境保护方面的短文。阅读此类短文要以现象或事物为中心进行思考，理解现象产生的原因、条件和客观规律等。同时要抓住事物的特征、用途和相互关系等。科普环保类文章一般为说明文，从结构上看大致可分为三个部分：
第一部分一般是文章的首段，主要用来提出文章的主题，即文章想要阐述、说明的主要内容；
第二部分是文章的主体，可由若干个段落组成，对文章的主题进行展开说明；
第三部分是结尾段，对文章的主题进行归纳总结。这类文章多用一般现在时，而且一般多使用客观性词语表述。有时为了强调客观性，也常使用被动语态。
从近几年的考试题来看，科普环保类的文章越来越与人们的实际生活相接近。由于此类文章缺乏故事情节，很多同学对此类文章感到费解。但一般的科普类文章都是就事论事，需要逻辑推理和想象的时候较少，因此此类阅读题也没有同学们想象中的那么难，只要多加训练，就能较好地答题。
【阅读策略】
1、概要(Summarizing)：
阅完材料后，将所阅材料浓缩，摘要，做出所阅材料的书面或口头梗概。
2、组织(Organization)：
阅读后根据阅读内容，识别观点、人物、事件之间的关系以及文章的结构关系。如：时间关系、比较或对比关系、相关关系及因果关系等。
