Question

Judging from recent surveys, most experts in sleep behavior agree that there is virtually an epidemic（流行�。� 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 sleep-deficit（lack）crises 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, researches 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 programs．“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 sleep-deficit, 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 sleep deficit, performance suffers,” says Dr．David．“Short-term memory is weakened, as are abilities to make decisions and to concentrate．”

1.What is the main topic of the passage?

    A. The history of people’s sleeping patterns．

    B. The epidemic of sleepiness in the modern times．

    C. Research on the causes and consequences of sleep-deficit．

    D. The minimum of our sleeping hours．

2.Which of the following is Dr．David’s opinion?

    A. People’s metal power suffers if they are lacking in sleep．

    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 who think they are sleeping enough are better off than those who don't．

3.People in the 18th and 19th centuries slept about 9．5 hours a night because _______．

    A. they had no electricity

    B. they knew what was best for their health

    C. they were forced by their parents to do so

    D. they were not so dynamic and ambitious as modern people are

4.The major cause of sleep-deficit of modern people is _______．

    A. the endless TV programs in the evenings and the internet

    B. the heavy work load of the day

    C. the sufficient energy modern people usually have

    D. loud noises in the modern cities

5.What does the word “subjects” in paragraph 4 mean?

    A. Person or thing that is being discussed or described．

    B. Branch of knowledge studied in a school．

    C. Person or thing being treated in a certain way or being experimented on．

    D. Any member of a State apart from the supreme ruler．

 

Answer 1

【答案】

 

1.C

2.A

3.A

4.B

5.C

【解析】

試題分析：本文主要講了研究員對睡眠不足對人類的影響做試驗研究。

1.根據To determine the consequences of sleep-deficit，故選C。

2.根據We’ve found that if you’re in sleep deficit, performance suffers,” says Dr．David．“Short-term memory is weakened, as are abilities to make decisions and to concentrate．”，故選A。

3.根據“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．”，故選A。

4.根據Perhaps the most merciless robber of sleep, researches 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 programs，故選B。

5.根據through a set of psychological and performance tests requiring them，故選C。

考點：說明文閱讀理解。

點評：做這類題要有理有據，以文中所給事實細節(jié)為依據，全面把握作者思路與文章脈絡，對隱含的觀點進行合理推測與判斷，深入領會作者“言外之意”，切忌主觀臆斷，斷章取義，曲解作者本意。