首页
登录
职称英语
Judging from recent surveys, most experts in sleep behaviour agree that ther
Judging from recent surveys, most experts in sleep behaviour agree that ther
游客
2024-02-12
18
管理
问题
Judging from recent surveys, most experts in sleep behaviour agree that there is virtually an epidemic 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 crises can be traced to the invention of the light bulb a century ago. From diary entries and other 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 eight 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, eight or even more to feel ideally vigorous."
Perhaps the most merciless robber of sleep, researchers say, is the complexity of the day. Whenever pressures from work, family, friends and community mount, many people consider sleep the least expensive item on his programme. "In our society, you’re considered dynamic if you say you only need 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 re call 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." [br] People in the 1th and 1th centuries slept about . hours a night because ______.
选项
A、they were forced by their parents to do so
B、they knew what was best for their health
C、they had to do so because of their life style and the lack of electricity
D、they were not so dynamic and ambitious as modem people are
答案
C
解析
文章第二段第一句指出,我们睡眠不足这一危机始源于一个世纪以前电灯的发明。接着在第三句讲到,以前那些最好的睡眠习惯是强加于我们的,因为那时我们在晚上无事可做,而且没有电灯,一片漆黑,由此可知选项C)正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3444745.html
相关试题推荐
Internethaslongbeenthefocusofresearch.Recently,alargestudy【C1】___
Internethaslongbeenthefocusofresearch.Recently,alargestudy【C1】___
Internethaslongbeenthefocusofresearch.Recently,alargestudy【C1】___
Internethaslongbeenthefocusofresearch.Recently,alargestudy【C1】___
Internethaslongbeenthefocusofresearch.Recently,alargestudy【C1】___
Internethaslongbeenthefocusofresearch.Recently,alargestudy【C1】___
Internethaslongbeenthefocusofresearch.Recently,alargestudy【C1】___
Internethaslongbeenthefocusofresearch.Recently,alargestudy【C1】___
Internethaslongbeenthefocusofresearch.Recently,alargestudy【C1】___
Internethaslongbeenthefocusofresearch.Recently,alargestudy【C1】___
随机试题
Thisisapicture.Inthe【T1】________,thereisahousebuiltintotheside
Despiteahugefloodofparticipants,buttheblogosphere
某一非确定性有限自动机(NFA)的状态转换图如下图所示,与该NFA等价的正规式是
我国首家文物监管旧货市场、亚洲最大的古玩艺术品交易中心是( )。A.北京古玩城
下列关于投资基金国际化的意义说法错误的是()。A.本国基金投资于国际证券市
下列关于黄芩"清热燥湿,泻火解毒"功效相关的药理作用,错误的是A.镇静B.保肝利
胸廓饱满,前后径与横径约相等,肋间隙加宽是属于()。A.胸廓膨隆 B.扁平胸
商业银行确定目标市场时,应综合考虑自身经营实力和特点,选择()目标客户群。A.
技术分析法是对市场以外影响市场价格的因素进行研究来预测市场价格变动方向的方法。(
下列关于新线隧道开挖安全控制措施的说法,正确的有( )。A.加强地质情况观察,
最新回复
(
0
)