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 dange
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 dange
admin
2019-01-24
12
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 theory of sleep, evolution equipped us with a regular pattern of sleeping and waking for the same reason. The theory does not deny 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 a 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
根据文章第二段中:The theory does not deny 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,可知人们在夜间休息主要是因为晚间活动效率低下,而且可能很危险。故C正确。
转载请注明原文地址:https://kaotiyun.com/show/KVaC777K
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
Acomputercompanyhasaspecialpersonwhoanswersallquestionsthataresenttohim.Thepersonisa63yearsoldman.Heis
Wehaven’theard______newsofhimsinceheleftthecompany.
JohnPaulJoneswasoneofthefoundersoftheUnitedStatesNavy.DuringtheRevolution,thecoloniesweredesperate.Theyneed
Japan’s24-hourconveniencestores,alreadystrugglingwithlaggingsalesandgrowth,maysoonfaceyetanotherthreat—movesto
Thestrangecloseunderstandingbetweentwinsisafamiliarenoughphenomenon.Oftentheyseemtounderstandeachotherandshar
Peopleareusedtospeakingtheirnativelanguage,soimmigrantsarehavingmanyproblemsbetweenthefirstgenerationandthes
Theappealofadvertisingtobuyingmotivescanbothnegativeandpositiveeffects.Consumersmaybeconvincedtobuyaproduct
Thecompanysuddenlywentbankrupt,leaving3,000workers______.
WhenIcamethroughthecustomsattheairport,Ihadtopay______onthewatchIhadbought.
______forthetimelyinvestmentfromthegeneralpublic,ourcompanywouldnotbesothrivingasitis.
随机试题
宋明时期,认为“国家之大务莫大于恤民”的思想家是()
对受体脱敏的正确认识是:
女性,58岁,因颈部肿块不断增大半年就诊。既往体健。体格检查:右侧甲状腺肿大,约7×8×6cm,质硬,无压痛。CT检查:肿物侵及气管,累及前纵隔。细针穿刺显示:肿瘤由异型性明显的梭形细胞构成。该肿瘤的病理诊断应当是
Havingafewtoomanydrinkscanmeanmorethanjustablackoutorabadhangover.Peoplewhoengageinbingedrinkingarecourt
下列关于单颌全口义齿,说法错误的是
原子序数为25的元素,其+2价离子的外层电子分布为()。
投资者的申购、赎回信息由销售机构总部汇总后,传送给()。
同等尊严
Theteachersaidthattheearth______aroundthesun.
Themainreasonforthespreadingofthediseaseisn’tsomuchafallinlivingconditions______ariseinit..
最新回复
(
0
)