首页
登录
职称英语
Sleep is very ancient. In the electroencephalographic (脑电图仪的) sense we share
Sleep is very ancient. In the electroencephalographic (脑电图仪的) sense we share
游客
2024-02-03
47
管理
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. [br] Predators are _____.
选项
A、able to prey even when they are in deep dream sleep
B、more likely to experience dream sleep
C、incapable of preying when immobilized by dreamless sleep
D、good at preying on stupid animals
答案
B
解析
根据第2段第1句第4个分句可知应选B。A的内容与该段第2句相悖;C中dreamless sleep应为dream sleep。D的内容文中没有涉及。
转载请注明原文地址:https://tihaiku.com/zcyy/3417883.html
相关试题推荐
Sleepisveryancient.Intheelectroencephalographic(脑电图仪的)senseweshare
Sleepisveryancient.Intheelectroencephalographic(脑电图仪的)senseweshare
Sleepisveryancient.Intheelectroencephalographic(脑电图仪的)senseweshare
Sleepisveryancient.Intheelectroencephalographic(脑电图仪的)senseweshare
Sleepisveryancient.Intheelectroencephalographic(脑电图仪的)senseweshare
Sleepisveryancient.Intheelectroencephalographic(脑电图仪的)senseweshare
Sleepisveryancient.Intheelectroencephalographic(脑电图仪的)senseweshare
Sleepisveryancient.Intheelectroencephalographic(脑电图仪的)senseweshare
Sleepisveryancient.Intheelectroencephalographic(脑电图仪的)senseweshare
Sleepisveryancient.Intheelectroencephalographic(脑电图仪的)senseweshare
随机试题
Commercialbankdeposits,includingdemanddeposits,aresubjecttoimmediat
IonceaskedadvertisinglegendCarlAllywhatmakesthecreativepersontic
【B1】[br]【B11】[originaltext]TheUniversityLibraryisoneofthelargestacade
[originaltext]Asthehumanpopulationhasgrownandbecomewealthier,thed
2009年度全国旅行社营业收入为1806.53亿元,同比增长8.64%;毛利润总
能体现建设项目的实际投资的是()。A:竣工决算 B:设计概算 C:投资估算
某单位两座办公楼之间有一条长204米的道路,在道路起点的两侧和终点的两侧已栽种了
消防设施检测机构在某单位自动喷水灭火系统未安装完毕的情况下出具了合格的《建筑消防
有关出现结核病变态反应,下列哪项是错误的? A.常发生于原发结核感染的病人B.
银行承兑汇票的承兑银行,应当按照票面金额向出票人收取()的手续费。A:千分之一
最新回复
(
0
)