首页
登录
职称英语
[originaltext] No one knows exactly why we sleep. But scientists have learne
[originaltext] No one knows exactly why we sleep. But scientists have learne
游客
2023-08-03
21
管理
问题
No one knows exactly why we sleep. But scientists have learned a lot about how we sleep. From sleep experiments, scientists have learned that there are four different stages of sleep.
When you first fall asleep, your heart starts to beat more slowly and your breathing slows down. If something wakes you, you might not think that you had been asleep. Some people call this kind of sleep dozing. Scientists call it Stage One sleep. Next, if you are not awakened, you drift into a deeper sleep. Your pulse and breathing become even slower than they were during Stage One sleep. But you can still be awakened quite easily. If you take a cat nap, you probably will not get any further than this stage of sleep, which is called Stage Two.
If you sleep longer than about twenty minutes, you go into the third stage of sleep. Your body is very relaxed. It would take a loud noise to wake you up.
You have probably heard of people who walk in their sleep. No one knows what makes people sleepwalk. But a person can sleepwalk only during Stage Four. This is the deepest kind of sleep. If someone wakes you up during stage four, you might feel very confused. It might take you a few minutes to get used to being awake.
选项
A、Reasons for People’s Sleeping.
B、Four Stages of Sleep.
C、Reasons for sleepwalking.
D、A Sleep Experiment.
答案
B
解析
What’s the topic of the passage?
转载请注明原文地址:https://tihaiku.com/zcyy/2894556.html
相关试题推荐
[originaltext]Thegreatestimpetusforglobalizationtodayisnodoubtthe
[originaltext]TheInternethascreatedawholenewworldofsocialcommunic
[originaltext]M:Whatdidyousayyouweregoingtotakeupasacareer?W:Law
[originaltext]Todaywe’lltalkaboutnationalparksintheUnitedStates.
[originaltext]Themostobviousdifferencebetweenradioandtelevisionist
[originaltext]Notlongagoitwasassumedthatthedangersmanwouldmeeti
[originaltext]M:Interestinglecturetoday,didn’tyouthink?W:Well,Isuppos
[originaltext]TokyohasreplacedMoscowastheworld’smostexpensivecity
[originaltext]AmericanIndiansgrewandsmokedtobaccobeforeColumbuscame
[originaltext]M:Hi,Sue.IwaswonderingifyoucouldfillmeinonMonday’sc
随机试题
[originaltext]M:Arthur’sfarewelldinneristhisweekend.W:WishIcouldtake
[originaltext]Goodmorning.TodayI’dliketotalkaboutelectroniccigaret
EnvironmentalCountdown:WhereWe’reLosingandWinningFromm
可出现干酪样坏死的疾病有()A.结核病 B.伤寒 C.梅毒 D.阿米巴
测量学是研究如何将地球的形状和大小,并将设计图上的工程构造物放样到实地的科学。其
糖酵解的终产物是()A.丙酮酸 B.乙酰辅酶A C.乳酸 D.乙醇
把产品技能和知识带到项目团队的恰当方式是( )。A.让项目经理去学校学习三年,
所谓新闻侵权是指行为人通过新闻媒体(包括通讯社、报刊杂志、广播电视、公共新闻网站
调整求助动机是心理咨询过程中()的工作。 (A)诊断阶段
某施工企业在异地设有项目部,项目部与材料供应商订立了采购合同。材料交货后货款未支
最新回复
(
0
)