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
Sleep is very ancient. In the electroencephalographic (脑电图仪的) sense we share it with all the primates (灵长类动物) and almost all the
Sleep is very ancient. In the electroencephalographic (脑电图仪的) sense we share it with all the primates (灵长类动物) and almost all the
admin
2016-10-07
75
问题
Sleep is very ancient. In the electroencephalographic (脑电图仪的) sense we share it with all the primates (灵长类动物) and almost all the other mammals and birds: it may extend back as far as the reptiles (爬行动物).
There is some evidence that the two types of sleep, dreaming and dreamless, depend on the life style of the animal, and that predators (食肉动物) are statistically much more likely to dream than prey, which are in turn much more likely to experience dreamless sleep. In dream sleep, the animal is powerfully immobilized (使固定不动) and remarkably unresponsive to external stimuli. Dreamless sleep is much shallower, and we have all witnessed cats or dogs cocking their ears to a sound when apparently fast asleep. The fact that deep dream sleep is rare among prey today seems clearly to be a product of natural selection, and it makes sense that today, when sleep is highly evolved, the stupid animals are less frequently immobilized by deep sleep than the smart ones. But why should they sleep deeply at all? Why should a state of such deep immobilization ever have evolved?
Perhaps one useful hint about the original function of sleep is to be found in the fact that dolphins and whales and aquatic mammals in general seem to sleep very little. There is, by and large, no place to hide in the ocean. Could it be that, rather than increasing an animal’s vulnerability, Ray Meddis of London University has suggested this to be the case. It is conceivable that animals that are too stupid to be quite on their own initiative are, during periods of high risk, immobilized by the implacable arm of sleep. The point seems particularly clear for the young of predatory animals. This is an interesting notion and probably at least partly true.
Which of the following might be the best title for this passage?
选项
A、Evolution of Animal’s Sleep.
B、Two Types of Sleep.
C、The Original Function of Animal’s Sleep.
D、Animals and Sleep.
答案
A
解析
本文三段虽然讨论的内容各有侧重,但是都谈到了睡眠在各种动物中的差异以及发展的历史,具体用词如下:第1段第1句中的ancient,最后一句中的extend back;第2段最后一句中的evolved;第3段第1句中的original function。A比较准确地归纳了本文大意。B只是概括了第2段的内容;C只提及第3段的论述内容;D似乎涵盖了三段内容,但是过于宽泛,不够具体。
转载请注明原文地址:https://kaotiyun.com/show/75Y7777K
0
大学英语四级
相关试题推荐
A、DuringtheIndustrialRevolution.B、IntheMiddleAges.C、AftertheSecondWorldWar.D、Aftertheinventionoftelevisions.A推
Becarefulwhatyousayaroundyourdog.Itmightunderstandmorethanyouthink.AbordercollienamedRicorecognizesthename
Inmanycountries,authorityisseldomquestioned,eitherbecauseitishighlyrespected,orbecauseitis【B1】_______.Sometimes
Inmanycountries,authorityisseldomquestioned,eitherbecauseitishighlyrespected,orbecauseitis【B1】_______.Sometimes
A、Shemissedthebus.B、Shecaughtthebus.C、Shegotupfiveminutesearlierthanusual.D、Shelikesgettingupearlyinthemo
A、Americanpeoplegetmorenewsandentertainmentthanbefore.B、TherehasbeenaconsiderablechangeinAmericanmedia.C、Cable
Workerswithskillsinscience,technology,engineering,andmathematics(STEM)areamongthemostindemandandhighestpaid.Th
AboutoneintwentyadultsintheUnitedStatescannotreadEnglish.Anewfederalstudyshowsthatadultsmadelittleprogress
Afterthreeyearsofpreciseanalysis,X-raysandinfrared(红外线的)imaging,expertsclaimtohaveuncoveredtheonlysurvivingport
随机试题
人生的根本价值在于
贼仁者谓之“贼”,贼义者谓之“残”。
A.升华法B.碱提酸沉法C.溶剂萃取法D.煎煮法E.酸提碱沉法提取分离升华性成分可选用
川芎性味为郁金性味为
甲诉乙人身损害赔偿一案,一审法院根据甲的申请,冻结了乙的银行账户,并由李法官独任审理。后甲胜诉,乙提出上诉。二审法院认为一审事实不清,裁定撤销原判,发回重审。关于重审,下列哪一表述是正确的?(2014年卷三第47题)
各级政府质量监督机构对建设工程质量监督的职能是()。
一种衣服过去每件进价60元,卖掉后每件的毛利润是40元。现在这种衣服的进价降低,为了促销,商家将衣服八折出售,毛利润却比过去增加了30%,请问现在每件衣服进价是多少元?()
Thereseemsnevertohavebeenacivilizationwithouttoys,butwhenandhowtheydevelopedisunknown.Theyprobablycameabout
(2013年真题)清朝光绪年间,某官员甲因犯罪而被发配新疆,给驻防八旗官兵当差为奴。甲被判处的刑罚是()。
Iftheyhadworkedharder,they_____.theprojectaheadoftime.
最新回复
(
0
)