首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A、Because the number of the subjects was rather small. B、Because the significance of the survey was limited. C、Because the amoun
A、Because the number of the subjects was rather small. B、Because the significance of the survey was limited. C、Because the amoun
admin
2021-09-29
42
问题
Caffeine and napping have something in common.
They both make you feel alert and can enhance your performance, whether that’s driving, working or studying.
But some people are convinced that drinking a cup of coffee before taking a nap gives you extra energy when you wake up.
Drinking coffee can also help us get through the day. And since the 1990s, researchers have been studying how combining the two might help.
In a 1997 study, 12 sleep-deprived people drank the equivalent of one large cup of brewed coffee and five minutes later had the chance to nap for 15 minutes. They then did some driving tests in a simulator to check their alertness.
Although drinking a coffee (without a nap) helped their driving performance, combining caffeine with a nap—a coffee nap—improved it even further.
People who took a coffee nap were less likely to drift out of their lanes on a two-hour monotonous simulated drive.
This was compared to when they just drank a cup of coffee (and had no nap) or when they had a cup of decaffeinated coffee (and without a nap).
A coffee nap even helped performance if people dozed during their nap time rather than falling into a deeper sleep. A coffee nap also reduced sleepiness once people got up, with people remaining alert for a couple of hours.
However, this early, small study was questioned. For instance, we don’t know how much coffee the people in the study were used to drinking or if they were what researchers call caffeine-naive and so more likely to experience a greater caffeine "hit. "
Questions 9 to 11 are based on the passage you have just heard.
9.What did the 1997 study find about people who took a coffee nap?
10. What did the study find about the benefit of a coffee nap?
11.Why was the study questioned according to the speaker?
选项
A、Because the number of the subjects was rather small.
B、Because the significance of the survey was limited.
C、Because the amount of caffeine the subjects have was unknown.
D、Because the subjects’ sensitivity to caffeine was unknown.
答案
D
解析
短文最后提到,这个早期的小研究遭到了质疑。讲话者提到了两个例子:我们不知道研究对象平时习惯于喝多少咖啡,不知道他们是不是研究者所称的“初涉咖啡”而因此受咖啡因的影响更大。因此答案为D)。
转载请注明原文地址:https://kaotiyun.com/show/1Ix7777K
0
大学英语六级
相关试题推荐
A、Toprovethatshecouldearnherlivingasagardener.B、Toshowthatwomenaremorehardworkingthanmen.C、Toshowthatwome
Althoughrecentyearshaveseensubstantialreductionsinnoxiouspollutantsfromindividualmotorvehicles,thenumberofsuch
Exceptionalchildrenaredifferentinsomesignificantwayfromothersofthesameage.Forthesechildrentodeveloptotheirf
Yamagata-bornKenOkuyama,wellknowninautomobiledesigncircles,wasbroughtintostylethecompany’ssuperglossynewCruis
RogerRosenblatt’sbookBlackFiction,inattemptingtoapplyliteraryratherthansociopoliticalcriteriatoitssubject,succ
You’vebeenworkingoutregularlyforquiteawhile,butyou’renowherenearyourfitnessgoals.Sonowit’stimetobringin
SlowHopeA)Ourworldisfullof—mostlyuntold—storiesofslowhope,drivenbytheideathatchangeispossible.Theyare’s
A、Giveapresentation.B、Raisesomequestions.C、Startanewcompany.D、Attendaboardmeeting.A对话开头,女士问男士关于公司重组的报告准备得如何了,男士回答说
A、Celebratethesuccessinreachingthegoal.B、Makeanothergoalimmediately.C、Haveagoodrest.D、Analyzethefactorswhichh
A、Fromthegovernment.B、Fromanimalprotectionassociations.C、Fromcharityorganizations.D、Fromanimalcontroloffices.A
随机试题
某女,产后29天,恶露不止,量较多,色深红质粘稠有臭味,面色潮红,口燥咽干。舌质红,脉虚细而数,治疗选方( )。
标准施工合同通用条款规定,监理人审查承包人提交的竣工验收申请报告后认为工程已具备竣工验收条件,并已提请发包人进行工程验收。发包人在收到承包人竣工验收申请报告()天后未进行验收,视为验收合格。
违约责任具有()特征。
下列合同,应按照“技术合同”缴纳印花税的是()。(2018年)
公众责任保险的费率厘定后,保险人可根据保险业务期限的长短来选择适用的费率计算保费,常用的计算方式有()。
4,3,1,12,9,3,17,5,()
关于电子出版物的出版管理规定,说法错误的是()。
下列不属于“竹林七贤"的是()。
简述满意决策的原则。
函数u=3x3一xy+xy2在点P(1,2)处沿l=(一11,一3)方向的变化率为()
最新回复
(
0
)