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 Sleep is part of a person’s daily activity cycle. There are several different stages of sleep, and they too occur in c
Sleep Sleep is part of a person’s daily activity cycle. There are several different stages of sleep, and they too occur in c
admin
2016-07-17
36
问题
Sleep
Sleep is part of a person’s daily activity cycle. There are several different stages of sleep, and they too occur in cycles.【B1】______When you first drift off into slumber, your eyes will roll about a bit, your temperature will drop slighdy, 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.【B2】______For the next half hour or so, as you relax more and more, you will drift down through stage 2 and stage 3 sleep. 【B3】______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, your brain activity level will increase again slightly. 【B4】______Your eyes will begin to dart around under your closed eyelids as if you were looking at something occurring in front of you.【B5】______It is during 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 The delta rhythm will disappear, to be replaced by the activity pattern of brain waves.
B If you are an average sleeper, your sleep cycle is as follows.
C In stage 4 sleep people tend to dream.
D The lower your stage of sleep, the slower your brain waves will be.
E This period of rapid eye movement lasts for some 8 to 15 minutes and is called REM sleep.
F This is called stage 1 sleep.
【B3】
选项
答案
D
解析
睡眠越深入,脑电波就越缓慢。接下来两句话说:大约在开始睡眠后的40~60分钟,你将进入沉睡状态。这时脑电波表现为巨大的缓波,被称为δ节律。可以看出沉睡和脑电波的缓波为正比发生的,因此选D。
转载请注明原文地址:https://jikaoti.com/ti/lkJsFFFM
本试题收录于:
职称英语理工类B级题库职称英语分类
0
职称英语理工类B级
职称英语
相关试题推荐
ScienceandTechnologyThereisadifferencebetweenscienceandtechnology.【B1】______Sciencehastodowithdiscoveringth
CulturalDifferencesPeoplefromdifferentculturessometimesdothingsthatmakeeachotheruncomfortable,sometimeswithou
CulturalDifferencesPeoplefromdifferentculturessometimesdothingsthatmakeeachotheruncomfortable,sometimeswithou
CulturalDifferencesPeoplefromdifferentculturessometimesdothingsthatmakeeachotheruncomfortable,sometimeswithou
CulturalDifferencesPeoplefromdifferentculturessometimesdothingsthatmakeeachotheruncomfortable,sometimeswithou
Theirstyleofplayingfootballisutterlydifferent.
achildcanbetakenasmentallyretardedifheorshe.apersonofhighintelligencewillprobablyscore.
Inordertoimproveourstandardofliving,wehavetoaccelerateproduction.
随机试题
简述流程部门化的优缺点。
对脑动脉瘤的预后主要根据为
2岁女孩,身体瘦弱,多次患肺炎。胸部X线检查:肺血多,左心房,左心室增大,主动脉增宽。应诊断为
下列关于关税税率的表述中,正确的有()。
设立农村商业银行的最低注册资本为()。
一声“干妈”,不到两千块的床垫卖到一万三千八。如此推销,老太太还照样心疼“干闺女”,为她打掩护、做辩解。就赖老人糊涂吗?不尽然。推销者卖的就是床垫吗?不全是。公司一句口号暴露玄机:“代天下儿女尽孝。”说是“代尽孝”,其实在骗钱,这样的公司涉嫌欺诈。然而,老
下列关于中国书法特点的说法不正确的是()。
A.medicalB.soC.consideredA.Severalhotdaysare【T7】______aheatwaveB.【T8】______doesextremeheatC.causeser
一个人摄取的精炼糖和在消化过程中由食物分解成的糖就是进入人体血液的几乎所有葡萄糖(一种糖)的饮食来源。虽然咖啡在消化时自身不能分解成糖,但有时却能使人的血糖水平急剧上升,即使咖啡没有和奶油或者任何甜食一起饮用。以下哪项,如果正确,能最有助于解释上文
n阶矩阵求A的特征值和特征向量。
最新回复
(
0
)