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
2015-03-13
58
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.
Which of the following is the main idea of the passage?______.
选项
A、Evolution has equipped all creatures with a regular pattern of sleeping and waking.
B、The study of sleep is an important part of the evolutionary theory.
C、Sleeping patterns must be taken into consideration in the designing of robots.
D、The sleeping pattern of a living creature is determined by the food it eats.
答案
A
解析
本题是一道主旨题。文章由机器人需要休息展开,围绕进化过程中生物睡眠与清醒的模式进行介绍。
转载请注明原文地址:https://kaotiyun.com/show/pMUC777K
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
Cultureshockistheresultoftheremovalofthefamiliar.Suddenlytheindividualisfacedwiththenecessityofworking,comm
______intheofficemadeamistake,andthefirmregrettedcausingthecustomerinconvenience.
Thestudentsshouldbe______forthethingsthattheydo.
Morethanfortythousandreaderstolduswhattheylookedforinclosefriendships,whattheyexpected【56】friends,whattheywer
Inancienttimes,themostimportantexaminationswerespoken,notwritten.IntheschoolsofancientGreeceandRome,testingu
Onlyafterthestudentshavemasteredtherulesofpronunciation_____.
Noonehasyetsucceededinexplainingthe______ofhowlifebegan.
(非英语专业学生做)Directions:Inthispart,thereare5itemswhichyoushouldtranslateintoChinese,eachitemconsistingofone
Everymeans______butwithoutmuchresult.
Expectingababy?HEALTHYBABY:Manitoba’sPrenatal(怀孕)BenefitandCommunitySupportProgramsIt’swhat’sinsidethat
随机试题
A.地尔硫革B.洋地黄C.阿托品D.利多卡因E.胺碘酮治疗急性前壁心肌梗死并发心室纤颤最常用()
当事人在合同中约定了仲裁条款,出现下列哪些情况时,法院可以受理当事人的起诉?()。
(2007年)三角形物块沿水平地面运动的加速度为a,方向如图4—72所示。物块倾斜角为α。重W的小球在斜面上用细绳拉住,绳另端固定在斜面上。设物块运动中绳不松软,则小球对斜面的压力FN的大小为()。
根据《会计基础工作规范》的规定,会计工作岗位可以一人一岗、一人多岗或者一岗多人。但出纳人员不可以兼任的工作是()。
某职业责任保险单的保险期限是2007年5月1日至2008年4月31日,追溯日期为2006年1月1日。下列哪项的条件可以得到理赔?( )
{an}是一个等差数列,a3+a7-a10=8,a11-a4=4,则数列前13项之和是()。
蛋白质变性作用的特点是
(2008年单选42)在唐朝,皇帝针对“百官有司之所常行之事”,临时颁发的各种敕令,经过编录之后成为“禁违止邪”的“永为法则”。这种法律形式是()。
-1/4
以下程序的输出结果是【】。main(){char*p[]={"BOOL","OPK","H","SP"};inti;for(i=3;i>0;i--,i--)printf("%c",*p[i]);printf(
最新回复
(
0
)