英语六级阅读词汇量大、句子结构复杂、题材多样化,为了提高考生阅读能力,精选了以下复习资料。
第46篇:
You stare at waterfall for a minute or two, and then shift your gaze to its surroundings. What you now see appears to drift upward.
These optical illusions occur because the brain is constantly matching its model of reality to signals from the bodys sensors and interpreting what must be happeningthat your brain must have moved, not the other; that downward motions is now normal, so a change from it must now be perceived as upward motion.
The sensors that make this magic are of two kinds. 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 burning ten miles away.
Color vision in each eye comes from six to seven million structures called cones. Under ideal conditions, every cone can see the entire rainbow spectrum of visible colors, but one type of cone is most sensitive to red, another to green, a third to blue.
Rods and cones send their messages pulsing an average 20 to 25 times per second along the optic nerve. We see an image for a fraction of a second longer than it actually appears. In movies, reels of still photographs are projected onto screens at 24 frames per second, tricking our eyes into seeing a continuous moving picture.
Like apparent motion, color vision is also subject to unusual effects. When day gives way to night, twilight brings what the poet T.S. Eliot called the violet hour. A light levels fall, the rods become progressively less responsive. Rods are most sensitive to the shorter wavelengths of blue and green, and they impart a strange vividness to the gardens blue flowers.
However, look at a white shirt during the reddish light of sunset, and youll still see it in its true colorwhite, not red. Our eyes are constantly comparing an object against its surroundings. They therefore observe the effect of a shift in the color of illuminating on both, and adjust accordingly.
The eyes can distinguish several million graduations of light and shade of color. Each waking second they flash tens of millions of pieces of information to the brain, which weaves them incessantly into a picture of the world around us.
Yet all this is done at the back of each eye by a fabric of sensors, called the retina, about as wide and as thick as a postage stamp. As the Renaissance inventor and artist Leonardo da Vinci wrote in wonder, Who would believe that so small a space could contain the images of all the universe?
1.Visual illusions often take place when the image of reality is ___.
A.matched to six to seven million structures called cones.
B.confused in the bodys sensors of both rods and cones.
C.interpreted in the brain as what must be the case.
D.signaled by about 120 million rods in the eye.
2.The visual sensor that is capable of distinguishing shades of color is called ___.
A.cones
B.color vision
C.rods
D.spectrum
3.The retina send pulses to the brain ___.
A.in short wavelengths
B.as color pictures
C.by a ganglion cell
D.along the optic nerve.
4.Twenty-four still photographs are made into a continuous moving picture just because ___.
A.the image we see usually stays longer than it actually appears.
B.we see an object in comparison with its surroundings.
C.the eyes catch million pieces of information continuously.
D.rods and cones send messages 20 to 25 times a second.
5.The authors purpose in writing the passage lies in ___.
A.showing that we sometimes are deceived by our own eyes.
B.informing us about the different functions of the eye organs.
C.regretting that we are too slow in the study of eyes.
D.marveling at the great work done by the retina.
第46篇答案:CADAB
2014巴西世界杯英语专题:关于瑞士主帅奥特马尔·希斯菲尔德
英美文化:英国人的度假习惯
英美文化:英国人的排队强迫症
十二个月份英语单词的来历
英美文化:教你如何科学地切蛋糕
正能量高考英语格言
听力辅导:6个步骤快速提升英语听力能力
关于亲情的英语格言
2014巴西世界杯评论单词汇总
七年级下册英语期末测试卷及答案
英美文化:西方人的离婚派对
2014巴西世界杯英文开幕词
教你英语四六级听力长对话如何边听边记
传递正能量英语故事
英语四年级下册暑假作业答案
听力辅导:跨越英语听力障碍的五个建议
2014巴西世界杯积分榜小百科
英美文化:没有他们就没有英语
英语短剧:《龟兔赛跑》
八人英语短剧:《重新开始》Turn over a New Leaf
英语短剧:《海的女儿》DAUGHTER OF THE SEA
八年级英语上册译林出版第一单元单词
关于理想的英语名言
英语搞笑小话剧《皮特与狼》Peter and the Wolf
八年级下册暑假大串联英语的答案
What would you like教案
四人英语话剧:A Sunny Day Party
英语作文万能句子:中间段落句
2014三年级下册英语暑假作业题
A Boy Who Lost 英语作文
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |