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
Everyone needs to sleep. If we don’t sleep enough, we often feel tired and irritable (烦躁的,易怒的). It seems there are two purposes
Everyone needs to sleep. If we don’t sleep enough, we often feel tired and irritable (烦躁的,易怒的). It seems there are two purposes
admin
2009-06-28
32
问题
Everyone needs to sleep. If we don’t sleep enough, we often feel tired and irritable (烦躁的,易怒的). It seems there are two purposes of sleep: active sleep and passive sleep. The passive sleep gives our body the rest that is needed, and prepares us for active sleep, in which dreaming occurs. In passive sleep, the body is at rest. The heat slows down. The body processes become very slow. We move very little. And the brain becomes very inactive. If a person continues to sleep, she or he enters a new stage, a more active stage. The body goes through several changes: the brain temperature rises, the amount of blood in brain increases, the body becomes very still and the brain becomes active, the eyes begin to move rapidly, and the person is dreaming.
Throughout the night, people alternate between passive and active sleep. During eight hours of sleep, people dream for a total of one and a half hours on the average.
Many people say that they don’t dream, or that they rarely dream. Doctors have studied the sleep cycles and have found that everyone dreams -- in fact, that everyone needs to dream in order to rest his or her mind.
There are (46) purposes of sleep: active sleep and passive sleep.
In (47) sleep, the body processes become very slow.
In (48) sleep, dreaming occurs.
In active stage, (49) becomes active.
People need active sleep to help them (50) .
选项
答案
two
解析
文章第一段第三句话明确说明有两种目的的睡眠。
转载请注明原文地址:https://kaotiyun.com/show/7HuK777K
本试题收录于:
大学英语三级B级题库大学英语三级分类
0
大学英语三级B级
大学英语三级
相关试题推荐
Theforeignlanguagesschoolhasalargecollectionofbooks,______areinEnglish.
Wedon’tthinkanyonecan______uswithbeingirresponsibleforthestudents.
A、Totakelessonshimself.B、Tobeclosetohisfamily.C、Toteachbetterstudents.D、Tohavemorestudents.D短文中说Lewis决定再次搬迁,到一
Moststudents______theirjobsbytheendofJuly.
In18th-centurycolonial(殖民地的)America,thosewhowantedtobecomedoctorseitherlearnedaspersonalstudentsfromestablished
A、Motherandson.B、Sisterandbrother.C、Teacherandstudent.D、Classmates.C男士为在女士任教学科的考试中表现不佳表示抱歉,女士表示没关系,并说她知道男士已经尽了最大努力了。由此
A、Hehadbeenonasickleaveforamonth.B、Hehadfinishedhisgraduationpaper.C、Hegraduatedfromschoollastmonth.D、Heh
A、Colleagues.B、Classmates.C、Nurseandpatient.D、Teacherandstudent.B男士问女士可否告诉Baker博士他病了,今天不能去上课了;女士说这不是个好主意,除非男士打算退选这门课。由此可
Peopletendtocollectpossessions,sometimeswithoutbeingawareofdoingso.Indeed,theycanhavea【T1】______surprisewhenth
Aresomepeopleborncleverandothersbornstupid?Orisintelligencedevelopedbyourenvironmentandourexperiences?Strange
随机试题
精馏塔操作时,回流比与理论塔板数的关系是()。
使用两个密钥的算法是
净收入理论的基本假定不包括()。
上市公司股东申请发行可交换公司债券的,应当向()申请。
房地产企业和非房地产企业转让新建房,在计算土地增值税时,均能作为“与转让房地产有关的税金”扣除的有()。
贵金属产品投资所面临的主要风险有()。
为了记住“老鼠”“桌子”这两个词,而进行“老鼠正在啃桌子”这样的联想,所运用的学习策略是()。
设f(x)满足等式xf’(x)-f(x)=,且f(1)=4,则∫01f(x)dx=_______.
PsychologistGeorgeSpilichandcolleaguesatWashingtonCollegeinChestertown,Maryland,decidedtofindoutwhether,asmany
ThenametheWarsoftheRoseswas,infact,coinedbythegreat19thcenturynovelist______.
最新回复
(
0
)