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
No one knows exactly why we sleep. But scientists have learned a lot about how we sleep. When you first fall asleep, your hea
No one knows exactly why we sleep. But scientists have learned a lot about how we sleep. When you first fall asleep, your hea
admin
2012-05-08
46
问题
No one knows exactly why we sleep. But scientists have learned a lot about how we 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 it dozing (打盹). Next, you enter into a deeper sleep. Your pulse (脉搏) and breathing become even slower. But you can still be awakened quite easily. If you take a catnap, you probably will not get any further than this stage (阶段) of sleep. If you sleep longer than about twenty minutes, you get into the third one. Your body is very relaxed. It would take a loud noise to wake you up. You may have 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 last and deepest kind of sleep. If someone wakes you up, you might feel very uncomfortable and you need a few minutes to get used to being awake. After about ten minutes of this stage sleep, you go back to stage three and then to stage two. Then something quite different begins to happen. Your heartbeat becomes rapid. Your eyelids flutter (颤动), and your eyes move. This stage of sleep is called REM (rapid eye movement) sleep.
Most dreams happen during REM sleep. Scientists who study dreams often make noises or talk to sleeping people in the REM stage. They are trying to find out what effects noises can have on dreams, what causes dreams and how dreams might be helpful to people.
When a person is seen dozing, it suggests that he ______.
选项
A、is sleepy
B、is awake
C、is falling asleep
D、has fallen asleep
答案
D
解析
第二段的开头讲到睡眠的第一阶段,“Some people call it dozing.”说明打盹的人也是睡着了的。所以正确答案是D。选项C表示“马上要睡着”,因此是不正确的。
转载请注明原文地址:https://kaotiyun.com/show/8Jwd777K
本试题收录于:
公共英语二级笔试题库公共英语(PETS)分类
0
公共英语二级笔试
公共英语(PETS)
相关试题推荐
Whataretheygoingtodonext?
InonespecialprogrammeinNewYorkState,youngandolderpeople______.Allthemembersworksometimeeverydaymainlyto__
Youngpeopleandolderpeopledonotalwaysagree.Theysome-timeshavedifferentideasaboutliving,workingandplaying.But
ComputerprogrammerBrendanTammyearned£55000ayearbydesigningnewcomputergames,yethecannotfindabankpreparedtol
ThomasJeffersonwasthefirstPresidenttotakeofficeinthenewcapital,WashingtonD.C.AlthoughWashingtonwasanewcity,
Everyhumanhasaveryuniquearrangementoftheskinonhisfingerandthisarrangementisunchangeable.Scientistsandexperts
Themanlearned______thattherewouldbeaconcertlastFri-day.Hetriedtogotothetheatreeverydaybutmanagedtogetthe
Whattimedoesthewomanaskthemantocometotheoffice?
A、Helpingpeoplethroughherwork.B、Reportinginterestingstories.C、Beingabletododifferentjobswell.D、Payingthroughher
Susanisnearly35.Herparentsthinkit’stimeshe______married.
随机试题
国债是国家信用的主要形式,政府发行债券的首要动因是()。
A.妊娠20周后胎儿宫内死亡B.妊娠13~27周未分娩C.妊娠28~36+6周分娩D.妊娠24周胎儿宫内死亡E.妊娠42周后分娩死胎
以下关于胃十二指肠溃疡穿孔的叙述中,哪项不正确
女,18岁,上唇红肿疼痛5天,加重伴寒战、高热、头痛2天。检查:表情淡漠,体温39.5℃,心率120次/分,上唇隆起呈紫红色,中心组织坏死塌陷,有多个脓栓,鼻部眼部及其周围广泛肿胀,发硬触痛;化验WBC25×109/L,N0.90。本例应考虑的诊断
调查工作用图()较高的精度,要具有()性。
下列说法正确的是()。
下列项目中,应计提折旧的固定资产有()。
下列不属于合唱指挥的基本要求的是()。
作为整个应用程序入口点的主程序至少应具有以下功能()。
以下软件中属于计算机应用软件的是
最新回复
(
0
)