题目内容 (请给出正确答案)
[主观题]

Judging from recent surveys, more experts in sleep behavior. 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 crisis 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, that 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 on their sleep, and they don't even realize they're doing it." says Dr. David. "They think they are 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 program. "In our society, you're considered dynamic if you say you only need 5.5 hours' sleep. If you've got to sleep 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."

People in the 18th and 19th centuries used to sleep about 9.5 hours a night because they had ______.

A.no drive or ambition

B.no electric light

C.the best sleep habits

D.nothing to do in the evening

提问人:网友taolin 发布时间:2022-01-07
参考答案
查看官方参考答案
如搜索结果不匹配,请 联系老师 获取答案
更多“Judging from recent surveys, m…”相关的问题
第1题
4 Most research has also agreed that there is a positive role of instruction for grammar learning.
点击查看答案
第2题
Who are supposed to benefit most from this passage?

A、Workers who have to work during holidays.

B、Employees who intend to earn extra money.

C、Big companies that usually close on holidays.

D、Small businesses that try to be more competitive.

点击查看答案
第3题
Judging from their facial makeup, costumes, language and gestures, audience usually can tell the roles of Peking Opera.
点击查看答案
第4题
Economy, efficiency and effectiveness are particularly useful when judging the performance of non-profit seeking organisations.
点击查看答案
第5题
It can be concluded from the passage that one should sleep as many hours as is necessary to______.

A.improve one's memory dramatically

B.be considered dynamic by other people

C.maintain one's daily schedule

D.feel energetic and perform. adequately

点击查看答案
第6题

The fitness movement that began in the late 1960s and early 1970s centered around aerobic exercise. Millions of individuals became engaged in a variety of aerobic activities, and literally thousands of health spas developed around the country to capitalize on this emerging interest in fitness, particularly aerobic dancing for females. A number of fitness spas existed prior to this aerobic fitness movement, even a national chain with spas in most major cities. However, their focus was not on aerobics, but rather on weight-training programs designed to develop muscular mass, strength, and endurance in their primarily male enthusiasts. These fitness spas did not seem to benefit financially from the aerobic fitness movement to better health, since medical opinion suggested that weight-training programs offered few, if any, health benefits. In recent years, however, weight training has again become increasingly popular for males and for females. Many current programs focus not only on developing muscular strength and endurance but on aerobic fitness as well

Historically, most physical-fitness tests have usually included measures of muscular strength and endurance, not for health-related reasons, but primarily because such fitness components have been related to performance in athletics. However, in recent years, evidence has shown that training programs designed primarily to improve muscular strength and endurance might also offer some health benefits as well. The American College of Sports Medicine now recommends that weight training be part of a total fitness program for healthy Americans. Increased participation in such training is one of the specific physical activity and fitness objectives of Healthy People 2000: National Health Promotion and Disease Prevention Objectives.

The word "spas" (Para. 1) most probably refers to ______.

A.sports activities

B.places for physical exercise

C.recreation centers

D.athletic training programs

点击查看答案
第7题

听力原文: How do you blow I billion? With that much money, you could buy every jewel in Tiffany's, collect a small fleet of 747s... or bankrupt a vulnerable bank. That's what Nicholas Leeson apparently did. The 2g-year-old trader for British investment house Barings PLC. in Singapore staked more than 1 billion of the company's money last winter on Japanese derivatives, and got tsunamied. For weeks he tried to recoup his mounting losses with double-or-nothing bets and doctored bookkeeping. He was arrested in Frankfurt on his way to London. Germany extradited him to Singapore last month, where he was sentenced to 6.5 years in prison. Leeson is appealing.

According to the news, Leeson

A.bankrupted a vulnerable bank.

B.was a British investor in Singapore.

C.worked as a teller in Singapore.

D.took exactly 1 billion from the bank last winter.

点击查看答案
第8题
The number of government soldiers killed, captured and wounded in the ambush is

A.18.

B.23.

C.25.

D.30.

点击查看答案
第9题
How can the most effective complaint be made?

A.Showing the faulty item to the manager.

B.Explaining exactly what is wrong with the item.

C.Saying firmly that the item is of poor quality.

D.Asking politely to change the item.

点击查看答案
账号:
你好,尊敬的用户
复制账号
发送账号至手机
密码将被重置
获取验证码
发送
温馨提示
该问题答案仅针对搜题卡用户开放,请点击购买搜题卡。
马上购买搜题卡
我已购买搜题卡, 登录账号 继续查看答案
重置密码
确认修改
欢迎分享答案

为鼓励登录用户提交答案,简答题每个月将会抽取一批参与作答的用户给予奖励,具体奖励活动请关注官方微信公众号:简答题

简答题官方微信公众号

警告:系统检测到您的账号存在安全风险

为了保护您的账号安全,请在“简答题”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!

微信搜一搜
简答题
点击打开微信
警告:系统检测到您的账号存在安全风险
抱歉,您的账号因涉嫌违反简答题购买须知被冻结。您可在“简答题”微信公众号中的“官网服务”-“账号解封申请”申请解封,或联系客服
微信搜一搜
简答题
点击打开微信