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
2023-06-29
20
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/2791658.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
苯胺经皮吸收的速度随环境中下列哪种因素增高而增加A.气温、气湿 B.气湿 C
下列最不可能由长期持续的吮拇指习惯引起的是A.深覆 B.上切牙唇倾 C.上牙
被誉为“东方第八大奇迹”的编钟出土于湖北()。A.武汉 B.荆州 C.随州
Thechangeinthatvillagewasmiraculou
建设单位应当将大型的人员密集场所和其他特殊建筑工程的消防设计文件报送公安机关消防
下列冻土的特性指标中,属于力学特性指标的是()。 A.冻土导热系数B.冻土
(2015年真题)2013年7月18日,孙某到甲公司应聘,双方口头约定合同期限2
若结构为非导电的屋顶时,则采用避雷带保护,该避雷带的网格为8~10m,每隔(
墙面石材铺装应符合的规定是()。A、较厚的石材应在背面粘贴玻璃纤维网布 B、较
(2021年真题)在确定项目债务资金结构比例时,重要的是在()之间取得平衡
最新回复
(
0
)