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
专升本
Suppose we built a robot(机器人)to explore the planet Mars. We provide the robot with seeing detectors to keep it away from danger.
Suppose we built a robot(机器人)to explore the planet Mars. We provide the robot with seeing detectors to keep it away from danger.
admin
2016-11-13
32
问题
Suppose we built a robot(机器人)to explore the planet Mars. We provide the robot with seeing detectors to keep it away from danger. It is powered entirely by the sun. Should we program the robot to be equally active at all times? No. The robot would be using up energy at a time when it was not receiving any. So we would probably program it to cease its activity at night and to wake up at dawn the next morning.
According to the evolutionary(进化的)theory of sleep, evolution equipped us with a regular pattern of sleeping and waking for the same reason. The theory does not deny(否认)that sleep provides some important restorative functions. It merely says that evolution has programmed us to perform those functions at a time when activity would be inefficient and possibly dangerous. However, sleep protects us only from the sort of trouble we might walk into; it does not protect us from trouble that comes looking for us. So we sleep well when we are in familiar, safe place, but we sleep lightly, if at all, when we fear that bears will nose into the tent.
The evolutionary theory accounts well for differences in sleep among creatures. Why do cats, for instance, sleep so much, while horses sleep so little? Surely cats do not need five times as much repair and restoration as horses do. But cats can afford to have long periods of inactivity because they spend little time eating and are unlikely to be attacked while they sleep. Horses must spend almost all their waking hours eating, because what they eat is very low in energy value. Moreover, they cannot afford to sleep too long or too deeply, because their survival depends on their ability to run away from attackers.
Evolution has programmed man to sleep at night chiefly to help him______.
选项
A、maintain a regular pattern of life
B、prevent trouble that comes looking for him
C、avoid danger and inefficient labor
D、restore his bodily functions
答案
C
解析
根据原文,进化设置人类睡眠主要是为了避免危险、恢复体能。
转载请注明原文地址:https://kaotiyun.com/show/1MHC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
Withhisbigfleshynosehe______hisgrandpa.
Americansocietyisnotnap(午睡)friendly.Infact,saysDavidDinges,asleepspecialistattheUniversityofPennsylvaniaSchool
Inrecentyears,moreandmoreforeignersareinvolvedintheteachingprogramsoftheUnitedStates.Boththeadvantagesandth
Accordingtosociologists,thereareseveraldifferentwaysinwhichapersonmaybecomerecognizedastheleaderofasocialgr
Thereisanewtypeofsmalladvertisementbecomingincreasinglycommoninnewspaperclassifiedcolumns.Itissometimesplaced
Hisremarksleftme______abouthisrealpurpose.
Thistelevisionsetisreallycheapinpriceandfineinquality.
Onseeingtheyoungchild______intothelake,Johnsprangtohisfeet,andwenttorescue.
Thescientist,however,goesonestepfurther:hemustbesurethathehasareasonableanswertohisquestionandthathisansw
Transportationhasincreasedeachperson’smobility.Initially,onecouldwalkabout20milesaday;usingahorseorbicyclew
随机试题
柳宗元认为刑、礼关系应是()
吗啡急性中毒时的特征性表现是
初次培养常需要CO2的细菌是()。
口腔分级预防的概念正确的是
1999年5月20日,刘某投保5年期简易人身保险,故意将自己68岁写成64岁,并交付了保险费。2001年6月10日,刘某因车祸死亡,该保险公司?
投标人甲公司的下列行为,属于《招标投标法》明令禁止的有()。[2011年真题]
小吴取得导游资格证书后,与一家旅行社签订了劳动合同,她可持劳动合同向()申请领取导游证。
某数码相机内置128MB的存储空间,拍摄分辨率设定为1600×1200像素,颜色深度为24位,若不采用压缩存储技术,使用内部存储器最多可以拍摄(14)张照片。
WhydidJim’sparentshaveaserioustalkwithhimoneyearago?BecauseJimhadspentalotoftimeon______.
A、Bykillingallthecells.B、Bykillingthevitalorgans.C、Bykillingthevitalcells.D、Bykillingmassesofcellsinvitalo
最新回复
(
0
)