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The Effects of Sleep Deprivation

Sleep restores the body and the mind and helps prevent disease by strengthening the immune system. However, many adults do not get the recommended eight hours of sleep each night. The average adult today gets only 6.4 hours of sleep, nearly an hour and a half less than what the average person received a century ago. Only in recent years have health professionals begun to realize the prevalence and severity of sleep deprivation in the working population. A significant number of people work at night, work long shifts, or suffer from insomnia or jet lag. Others are deprived of sleep because they work too hard, stay out too late, or try to do too many things in a day. Adults who regularly sleep six hours or less might think they accomplish more by staying up late, but they pay for it the next day when they feel sleepy or irritable or are unabl
A. The subjects were unable to complete simple word problems.
B. The subjects had no activity in part of the brain during verbal tasks.
C. The subjects could solve some cognitive tasks better than others.
D. The subjects felt irritable and expressed anger in their speec

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The Effects of Sleep Deprivation

Sleep restores the body and the mind and helps prevent disease by strengthening the immune system. However, many adults do not get the recommended eight hours of sleep each night. The average adult today gets only 6.4 hours of sleep, nearly an hour and a half less than what the average person received a century ago. Only in recent years have health professionals begun to realize the prevalence and severity of sleep deprivation in the working population. A significant number of people work at night, work long shifts, or suffer from insomnia or jet lag. Others are deprived of sleep because they work too hard, stay out too late, or try to do too many things in a day. Adults who regularly sleep six hours or less might think they accomplish more by staying up late, but they pay for it the next day when they feel sleepy or irritable or are unabl
A. A century ago, health professionals did not experience sleep deprivation; however, now it is a part of their jobs.
B. It is difficult to understand why health professionals have not studied the consequences of sleep deprivation.
C. Sleep deprivation used to affect only certain professions, but now it occurs in all sectors of the working population.
D. Health professionals have just started to understand that sleep deprivation in workers is a serious problem.

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[单项选择]Sleep deprivation is a known cause of workplace error, and many physicians frequently go without sleep for periods of 24 hours or more. However, few of these physicians have, in the course of a routine examination by a peer, been diagnosed with sleep deprivation. So there is little cause for concern that habitual sleep deprivation will cause widespread physician error.
The answer to which of the following questions would be most helpful in evaluating the argument
A. Do physicians who have been diagnosed with sleep disorders also show signs of other ills not related to sleep deprivation
B. Is the ability to recognize the symptoms of sleep deprivation in others significantly impaired by habitual sleep deprivation
C. Do factors other than habitual sleep deprivation ever lead to errors in the workplace on the part of physicians
D. Of people who have recently been treated by physicians, what percentage believe that many physicians have occasionally suffered from sleep deprivation
E. (E) Is the incidence of sleep deprivation higher among physicians than it is among other health care workers

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[单项选择]It has been necessary to refer to the effects of the two world wars in promoting all kinds of innovation. It should be (1) also that technological innovations have (2) the character of war itself by the (3) of new mechanical and chemical devices. One weapon developed during World War Ⅱ (4) a special mention. The (5) of rocket propulsions was well known earlier, and its possibilities as a (6) of achieving speeds sufficient to escape from the Earth’s gravitational pull had been (7) by the Russian and the American scientists. The latter built experimental liquid-fuelled rockets in 1926. (8) , a group of German and Romanian pioneers was working along the same line, and in the 1930s, it was this team (9) developed a rocket (10) of delivering a warhead hundreds of miles away. Reaching a height of over 100 miles, the V-2 rocket (11) the beginning of the space age, and members of its design team
A. encouraging
B. urging
C. promoting
D. assisting

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