关于睡觉的托福写作话题讨论.pdf

智 课 网 托 福 备 考 资 料 关于睡觉的托福写作话题讨论 目前托福写作是大家比较希望能拿分的项目，而这就少不了复习时 对各种托福作文题目的准备，下面介绍了一篇关于睡觉的托福独立写作 范文供大家参考。 托福写作准备之托福写作素材：关于睡眠 Sleep is very ancient. In the electroencephalographic sense we share it with all the primates and almost all the other mammals and birds: it may extend back as far as the reptiles. 智课培训新托福口语强化班： 【课程特色】 资深外教老师上课，深入讲解托福口语话题;熟练使用地道口语用此 及常用句型;掌握口语应对技巧。对托福口语考题进行梳理，对独立口语 及综合口语部分进行有针对性的训练和讲解，帮助学生在考场避免常见 错误。训练听写能力，加强笔记记录训练。 【授课教材】 新托福考试官方指南 新托福全真试题(TPO) 内部讲义 【课程简介】 学生能够有效完成 口语考试题目，并能很好的完成综合口语考试题 目。托福考试口语单项得分在25分及以上。 【适合人群】 短期内需参加托福考试 ，口语基础薄弱 ，需强化培训，在考试中取 得25分及以上的学员 There is some evidence that the two types of sleep, dreaming and dreamless, depend on the life-style of the animal, and that predators 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 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 pray 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 genera 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, the University of Florida and Ray Meddis of London University have suggested this to be the case. It is conceivable that a