新东方网>大学教育>专四专八>备考辅导>专业八级>改错>正文

2012英语专八改错练习(10)

2012-03-07 15:21

来源:可可英语

作者:

  【练习】

  You stare at waterfall for a minute or two, then shift your gaze to its surrounding. What you now see appears to drift upward. You __1

  are board a train in a busy station when suddenly another train next __2

  to your starts moving forward. __3

  For a fraction of a second you feel that your train has lurched backward. These optical illusions occur because the brain is constantly matching its model of reality to signals from the body’s sensors and interpret what must be happening – that your train __4

  might have moved, not the other; that downward motion is now __5

  normal, so a change from it must be perceived as upward motion.
The sensors that make this magic are two kinds. __6

  Each eye contains about 120 million rods, which provide somewhat blurry black and white vision. These are the windows of night vision; once adapted to the dark, they can detect a candle burnt __7

  ten miles away. Colorful vision in each eye comes from six to seven __8

  million structures called cones. Under ideal conditions, every cone can “see” the entire rainbowspectrum of visible colors, but one type of cone is most sensitive to red, another to green, the third to __9

  blue. By monitoring how many wavelength of light affects the different cones, a connected ganglion cell can determine its “color” and relay that data brainwork. Rods and cones send their messages pulsing an __10

  average 20 to 25 times per second along the optic nerve.

官方微信:新东方四六级 (微信号:xdfcet46

英语四六级课程、听说读写译方法、最新资讯,请扫二维码,关注我们! 

四六级真题及答案解析下载

手机号

猜你喜欢

  • 动态
  • 报考
  • 成绩
  • 辅导

          新东方英语四六级辅导专区

          班级名称 上课地点 上课时间 费用 详细

          焦点推荐

          精品直播

          版权及免责声明

          凡本网注明"稿件来源:新东方"的所有文字、图片和音视频稿件,版权均属新东方教育科技集团(含本网和新东方网) 所有,任何媒体、网站或个人未经本网协议授权不得转载、链接、转贴或以其他任何方式复制、发表。已经本网协议授权的媒体、网站,在下载使用时必须注明"稿件来源:新东方",违者本网将依法追究法律责任。

          本网未注明"稿件来源:新东方"的文/图等稿件均为转载稿,本网转载仅基于传递更多信息之目的,并不意味着赞同转载稿的观点或证实其内容的真实性。如其他媒体、网站或个人从本网下载使用,必须保留本网注明的"稿件来源",并自负版权等法律责任。如擅自篡改为"稿件来源:新东方",本网将依法追究法律责任。

          如本网转载稿涉及版权等问题,请作者见稿后在两周内速来电与新东方网联系,电话:010-60908555。

          热搜关键词