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
Sleep is part of a person’s daily activity cycle. There are several different stages of sleep, and they too occur in cycles. If
Sleep is part of a person’s daily activity cycle. There are several different stages of sleep, and they too occur in cycles. If
admin
2009-06-15
43
问题
Sleep is part of a person’s daily activity cycle. There are several different stages of sleep, and they too occur in cycles. If you are an average sleeper,(46). When you first drift off into slumber, your eyes will roll about a bit, your temperature will drop slightly, your muscles will relax, and your breathing will slow and become quite regular. Your brain waves slow down a bit too, with the alpha rhythm of rather fast waves predominating for the first few minutes.(47). For the next half hour or so, as you relax more and more, you will drift down through stage 2 and stage 3 sleep. The lower your stage of sleep,(48). Then, about 40 to 60 minutes after you lose consciousness, you will have reached the deepest sleep of all. Your brain waves will show the large slow waves that are known as the delta rhythm. This is stage 4 sleep.
You do not remain at this deep fourth stage all night long, but instead about 80 minutes after you fall into slumber,(49). The delta rhythm will disappear, to be replaced by the activity pattern of brain waves. Your eyes will begin to dart around under your closed eyelids as if you were looking at something occurring in front of you. This period of rapid eye movement lasts for some 8 to 15 minutes and is called REM sleep.(50). Provided that you do not wake up during the first REM sleep period, your body will soon relax again, your breathing will grow slow and regular once more, and you will slip gently back from stage 1 to stage 4 sleep--only to rise once again to the surface of near consciousness some 80 minutes later.
A. your brain activity level will increase again slightly.
B. The slower your brain waves will be.
C. Your brain is still working when you are sleeping.
D. Your sleep cycle is as follows.
E. It is during REM sleep that most dreams seem to occur.
F. This is called stage i sleep.
选项
答案
E
解析
意为:大多数梦发生在REM睡眠中。
转载请注明原文地址:https://jikaoti.com/ti/1ZqsFFFM
本试题收录于:
职称英语卫生类C级题库职称英语分类
0
职称英语卫生类C级
职称英语
相关试题推荐
YougotaletterrequestinginformationfromAndreaPhilips,themarketingmanagerofLinguaServicesLtd.
Youareaskedtowriteacompositioninwhichyougiveyourownopinionsonthefollowingstatement:Trafficandhousingpro
JohnWilliams,PersonnelDirectorofacompany,receivesanapplicationfromJackSmithapplyingforapositioninthecompanyb
Readthefollowingpassageanddecidewhichanswerbestfitseachspace.Forquestions26~45,markoneletterA,B,CorDo
Readthefollowingpassageandanswerquestions9-18.1.Mostyoungpeopleenjoysomeformsofphysicalactivity.Itmaybewalk
1.Distanceeducationisenrollmentandstudywithaneducationalinstitutionthatprovideslessonmaterialspreparedinaseque
Youaregoingtoreadamagazinearticleaboutlearningtoflyaplane.Eightparagraphshavebeenremovedfromthearticle.Cho
Hedescribedthehoteltousindetail.detailedHe____________________ofthehotel.
CancerChatisdifferentfromotherforumsinthatAllthestatementsaboutthemessagespostedonCancerChataretrueEXCEPT
随机试题
《喜宴》中的人物有【】
A.散点图B.线图C.圆图D.直方图E.统计地图适用于双变量资料,用点的密集度和趋势表达两变量间的相关关系。应绘制
A.证候相兼B.虚实真假C.寒热真假D.证候错杂E.证候转化寒包火证属于
已知正弦电流的初相为60°,t=0时的瞬时值为8.66A,经过1/300s后电流第一次下降为0,则其振幅Im为()A。
某消防服务机构对建筑面积为30000m2的大型地下商场进行安全评估。在对防火隔间进行检查时发现,防火分区通向防火隔间的门为乙级防火门,两个乙级防火门的间距为4m,隔间的装修为轻钢龙骨石膏板吊顶、阻燃壁纸装饰墙面,隔间内有几位顾客坐在座椅上休息。根据现行国家
在项目验收中,验收准备是由________组织勘察、设计、施工、监理、审计、质检等单位,做好验收准备工作。
“落红不是无情物,化作春泥更护花”这句诗体现了教师职业道德的()。
马太效应是指强者愈强、弱者愈弱的现象。任何个体、群体或地区,一旦在某一个方面(如金钱、名誉、地位等)获得成功和进步,就会产生一种积累优势,就会有更多的机会取得更大的成功和进步。根据上述定义,下列不属于马太效应的是()。
近代以来,中国被迫与列强签订了一系列不平等条约,丧失了大量领土主权。在以下不平等条约中,中国领土损失最大的是()。
以下哪一项不可能是左边立体图形的切面?
最新回复
(
0
)