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
2024-03-06
62
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/3510816.html
相关试题推荐
[originaltext](23)WiththeInternetrevolutionusheringinnewmodesofco
[originaltext](23)WiththeInternetrevolutionusheringinnewmodesofco
[originaltext]Hereisaquestionforyou.Thecustomerisalwaysright.Rig
[originaltext]Moderator:Hello,ladiesandgentlemen.Itgivesmegreat
[originaltext]Moderator:Hello,ladiesandgentlemen.Itgivesmegreat
[originaltext]MedicalexpertssaymostAmericansdonotgetenoughsleep.T
[originaltext]TheWorldHealthOrganizationsays57nationsinSouthernAfr
[originaltext]TheWorldHealthOrganizationsays57nationsinSouthernAfr
[originaltext]TheWorldHealthOrganizationsays57nationsinSouthernAfr
[originaltext]W:WhatdoyouthinkofTV?Ithinkitisafalsegod,adang
随机试题
Intheforeignexchangemarket,whichismadeupofbanks’tradersandbroke
WhatdidtheprofessorwanttotalktoAnnabout?[originaltext]M:Thanksforst
TheNationalAssociationofSecuritiesDealersisinvestigatingwhethersom
Fromthefirstparagraph,weknow______.[br]Allthefollowingarereasonsfo
图示电路具有: A.保持功能 B.置“0”功能 C.置“1”功能 D.计
对于类定义:classA{public:virtualvo
蛋白质的变性是由于A.肽键断裂,一级结构遭到破坏 B.次级键断裂,天然构象破坏
试述小学生认识能力发展特点与教育。
电子传递的递氢体有五种类型,它们按一定顺序进行电子传递,正确的是A.辅酶→泛醌→
某网约车电商平台为增值税一般纳税人,2019年11月提供网约车服务,开具普通发票
最新回复
(
0
)