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
考研
How much sleep does a person need?【31】the physiological bases of the need for sleep remain conjectural (猜想), rendering conclusiv
How much sleep does a person need?【31】the physiological bases of the need for sleep remain conjectural (猜想), rendering conclusiv
admin
2011-01-17
70
问题
How much sleep does a person need?【31】the physiological bases of the need for sleep remain conjectural (猜想), rendering conclusive answers to this question impossible, much evidence has been gathered on how much sleep people do in fact obtain. Perhaps the most important conclusion to be【32】from this evidence is【33】there is great variability among individuals in total sleep time. For adults,【34】between six and nine hours of sleep as a nightly average is not unusual, and 7.5 hours probably best expresses the norm. Such norms, of course, forms inevitably vary with the criteria of sleep employed, The most【35】and reliable figures on sleep time, including those cited here, come from studies in sleep laboratories, where EEG criteria are employed.
【36】consistently has been associated with the varying amount, quality, and pattern of electrophysiologically defined sleep. The newborn infant may spend an average of about 16 hours of each 24-hour period in sleep,【37】the sleep time drops sharply; by two years of age, it may【38】from nine to 12 hours. Decreases to approximately six hours have been observed among the elderly.
【39】will be discussed from below, EEG sleep studies have indicated that sleep can be considered to consist of several different stages. Developmental changes in the relative proportion of sleep time【40】in these sleep stages are as striking as age-related changes in total sleep time.
选项
A、how
B、what
C、whether
D、that
答案
D
解析
本题的考点是表语从句引导词,后面there-be从句语义完整,无须任何添加,故选择一个起语法作用的引导词that即可。
转载请注明原文地址:https://kaotiyun.com/show/9vYi777K
本试题收录于:
GCT工程硕士(英语)题库专业硕士分类
0
GCT工程硕士(英语)
专业硕士
相关试题推荐
Whentelevisionfirstbegantoexpand,veryfewofthepeoplewhohadbecomefamousasradiocommentatorswereabletobeeffect
JohnistheonlyOneofthestudentswho______toFrance.
Thebesttitleforthepassageis______.Ifapersonislateforbusinessmeeting,hemay______.
James:Hello.CouldIspeaktoJone,please?Jone:______.
Experimentsinthephotographyofmovingobjects______inboththeunitedstatesandEuropebefore1990.
Theword"imperative"(Para.1)mostprobablyreferstosomething______.Itcanbeinferredfromthepassagethat______.
WhichofthefollowingisNOTmentionedbytheauthorasaconsequenceofnewtechnologicaldevelopments?Whatistheauthor’s
HowistheimageofthenorthpolarcapofMars?WhenweretheimagesofMarstaken?
Bill:Here,Cindy!I’dlikeyoutomeetmybestpartner,Daniel(ToDaniel)ThisisCindy,mygirlfriend.Cindy:Hi,Daniel.___
Itmightbesupposedthatgreaterefficiencycouldbeachievedifseveralpeopleworkedtogethertosolveaproblemthanifonly
随机试题
强心苷疗效最好的心衰是
Rats!Throughallofhumanhistory,theyhavebeena【C1】______andaplaguetopeople.Theyeator【C2】______cropsofgrainandri
包埋时,粉液比例不当,液体的使用量过多,对铸件造成的后果
患者单某,常自汗出,夜卧尤甚,心悸惊惕,气短烦倦,舌淡红,脉细弱。治宜选用()
行政确认的主要形式有:()
一预应力后张法采用JM型锚具的24m钢筋混凝土屋架下弦,其一根预应力钢筋的长度为()m。
在使用GB/T2828.1时,要检索出适用的抽样方案,要首先确定的要素有()。
琵琶曲《十面埋伏》描绘的是哪次战役的情景?()
下列关于数据库系统的叙述中,正确的是______。
Whatisthepurposeofthemeeting?
最新回复
(
0
)