首页
登录
职称英语
Sleep is part of a person’ s daily activity cycle. There are several differe
Sleep is part of a person’ s daily activity cycle. There are several differe
游客
2023-07-18
55
管理
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, your sleep cycle is as follows. When you first drift off into slumber (安睡) , your eyes will roll about a bit, your temperature will drop slightly, your muscles will relax, and your breathing were 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. This is called stage 1 sleep. 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, the slower your brain waves will be. 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, hut instead about 80 minutes after you fall into slumber, your brain activity level will increase again slightly. 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 (眼皮) 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. 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. [br] The stages of sleep take on______.
选项
A、an irregular aspect
B、a regular aspect
C、a punctual aspect
D、a similar aspect
答案
B
解析
答案B。文章的第二句告诉我们睡眠的不同阶段是周期性发生的,故睡眠的各阶段呈现规则的一面。
转载请注明原文地址:https://tihaiku.com/zcyy/2847877.html
相关试题推荐
PopulationGrowthinDifferentNationsMorethan6,500mil
PopulationGrowthinDifferentNationsMorethan6,500mil
PopulationGrowthinDifferentNationsMorethan6,500mil
PopulationGrowthinDifferentNationsMorethan6,500mil
[originaltext]Manyofusbelievethataperson’smindbecomeslessactivea
[originaltext]Areyoutiredofyourjobandwanttodosomethingdifferent
[originaltext]Areyoutiredofyourjobandwanttodosomethingdifferent
A、Toattractpeoplewithdifferentinterests.B、Tochargeadditionalservicefee
Heisaveryeasy-goingperson,______(从结识新交中得到许多乐趣).whoderivesalotofpleas
[originaltext]TheUnitedStatesofAmericaisacountrymadeupofdifferen
随机试题
[originaltext]AnenvironmentalgroupcalledtheFoodCommissionisunhappy
社会知觉就是对人的知觉,就是对人和社会群体的知觉,就是对()的知觉。A.工作对
下列降低血糖的激素是A.胰岛素 B.胰高血糖素 C.糖皮质激素 D.生长激
评估风险管理效果是指对风险管理策略的()及收益性情况的分析、检查、修正和
证券产品进场时机选择的要求( )。 Ⅰ.选择进场时机需要积极的投资思维跟进
患者,男,38岁。两手出现皮下小水疱,疱壁破裂,叠起白皮,中心已愈,四周续起疱疹
小青龙汤中不包括的药物是A细辛、干姜 B桂枝、甘草 C半夏、五昧子 D苦杏
企业将活动项目、品牌和产品等信息以网络新闻通稿的方式在门户网站以及行业网站等平台
根据证券法律制度的规定,下列关于非公开发行公司债券的表述中,正确的是()。
早期胃癌是指( )。A.侵及黏膜下层及肌层的癌 B.直径小于2cm的癌 C
最新回复
(
0
)