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
2023-07-15
49
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, rattier 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时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/2838013.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)sensewesharei
Sleepisveryancient.Intheelectroencephalographic(脑电图仪的)sensewesharei
Sleepisveryancient.Intheelectroencephalographic(脑电图仪的)sensewesharei
Sleepisveryancient.Intheelectroencephalographic(脑电图仪的)sensewesharei
Sleepisveryancient.Intheelectroencephalographic(脑电图仪的)sensewesharei
随机试题
Whatarethespeakersmainlydiscussing?[br][originaltext]M:Hi,Mary.Doyou
[originaltext]M:WelcometoBritain.MayIseeyourpassportandpapers,please
Childrenwhoarepraisedfortheirworkarealways______on.A、encouragedB、appr
RecreationalcyclingappearstohavepeakedintheUS,itspopularitycresti
普通高中演奏模块中培养学生演奏技能的正确方法是() A.增加演奏实践机会
在建筑企业内部组织结构中,不容易引起多头领导的是()组织结构。A.职能制
制定劳动纪律时应符合哪些要求?
1953年9月,彭德怀在一份报告中说,抗美援朝战争的胜利雄辩地证明:“西方侵略者
对市场流动性要求最高的是恒定混合策略。()
损失补偿的范围不包括()。A.保险标的的实际损失 B.合理费用
最新回复
(
0
)