全國

          熱門城市 | 全國 北京 上海 廣東

          華北地區(qū) | 北京 天津 河北 山西 內(nèi)蒙古

          東北地區(qū) | 遼寧 吉林 黑龍江

          華東地區(qū) | 上海 江蘇 浙江 安徽 福建 江西 山東

          華中地區(qū) | 河南 湖北 湖南

          西南地區(qū) | 重慶 四川 貴州 云南 西藏

          西北地區(qū) | 陜西 甘肅 青海 寧夏 新疆

          華南地區(qū) | 廣東 廣西 海南

          • 微 信
            高考

            關(guān)注高考網(wǎng)公眾號

            (www_gaokao_com)
            了解更多高考資訊

          您現(xiàn)在的位置:首頁 > 高考資源網(wǎng) > 高中試卷 > 高二英語練習(xí)題 > 2009年新人教版高二英語上閱讀理解題7

          高中試卷

          高考真題

          高考模擬題

          高中課件

          高中教案

          2009年新人教版高二英語上閱讀理解題7

          來源:本站原創(chuàng) 2009-10-07 02:29:47

          [標(biāo)簽:人教版 高二 閱讀 英語]

            7

            Suppose we built a robot to explore the planet Mars. We provide the robot with seeing detectors(探測器) to keep it away from danger. It is powered entirely by the sun. Should we program the robot to be equally active at all the times? No. The robot would be using up energy at a time when it was not receiving any. So we would probably program it to stop its activity at night and to make up at dawn the next morning.

            According to the evolutionary(進(jìn)化的) theory of sleep, evolutionary equipped us with a regular pattern of sleeping and walking for the same reason. Theory does not deny(否認(rèn)) That sleep provides some important restorative functions(恢復(fù)功能). It merely says that evolutionary has programmed us to perform those functions at a time when activity would be inefficient (無效的)and possibly dangerious. However, sleep protects us only from the sort of trouble we might walk into; it does not protect us from trouble that comes looking for us. So we sleep well when we are in a familiar, safe place, but we sleep lightly, if at all, when we fear that bears will nose into the tent.

            The evolutionary theory explains the differences in sleep among creatures. Why do cats, for example, sleep so much, while horses sleep so little? Surely cats do not need five times as much repair and restoration as horse do. But cats can afford to have long periods of inactivity because they spend little time eating and are unlikely to be attacked while they sleep. Horse must spend over, they cannot afford to sleep to long or too deeply, because their survival(生存) depends on 

            下載:http://files.eduu.com/down.php?id=240218

          收藏

          高考院校庫(挑大學(xué)·選專業(yè),一步到位!)

          高校分?jǐn)?shù)線

          專業(yè)分?jǐn)?shù)線

          日期查詢

          京ICP備10033062號-2 北京市公安局海淀分局備案編號:1101081950

          違法和不良信息舉報(bào)電話:010-56762110     舉報(bào)郵箱:wzjubao@tal.com

          高考網(wǎng)版權(quán)所有 Copyright © 2005-2022 www.scgzkg.net . All Rights Reserved

          知識商店
          波多野结衣中文字幕在线 | 无码人妻一区二区三区在线水卜樱 | 中文字幕精品一区| 成人无码免费一区二区三区| 国产在线无码精品电影网| 无码超乳爆乳中文字幕久久| A∨变态另类天堂无码专区| 国产AV无码专区亚洲AV漫画 | 久久AV高潮AV无码AV| 日韩高清在线中文字带字幕 | 亚洲AV无码成人精品区大在线| 亚洲AV无码久久| 红桃AV一区二区三区在线无码AV| 亚洲伦另类中文字幕| 日韩亚洲国产中文字幕欧美| 91精品无码久久久久久五月天| 无码人妻AV一二区二区三区| 久久亚洲AV成人无码软件| 国产中文在线亚洲精品官网| 欧美精品中文字幕亚洲专区| 亚洲精品一级无码鲁丝片| 极品粉嫩嫩模大尺度无码视频 | 久久久久亚洲AV无码专区桃色| 色噜噜综合亚洲av中文无码| 亚洲av无码专区国产乱码在线观看 | 97无码免费人妻超级碰碰夜夜| 无码国内精品人妻少妇| 亚洲AV人无码激艳猛片| 亚洲AV永久无码精品| 亚洲成AV人片天堂网无码| 一本色道久久HEZYO无码| 亚洲中文字幕久久精品无码喷水| 寂寞少妇做spa按摩无码| 夜夜添无码一区二区三区| 亚洲AV永久无码精品成人| 无码A级毛片免费视频内谢| 少妇人妻无码精品视频app| 无码中文字幕av免费放dvd| 少妇无码一区二区三区| 国产成人无码专区| 中中文字幕亚洲无线码|