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
Sheryl Crow adopts a baby boy
娱乐资讯:Eva Longoria enjoys beach bachelorette weekend
Brad Pitt has the body men most envy
Jolie applauds US increase for orphans funding
Britney Spears pens personal Web message
娱乐资讯:Criss Angel explains Diaz dedication
Lindsay Lohan tops Maxim `Hot 100 list
Fan ordered to stay away from Bullock
Spears is subject of unflattering photos
Keira Knightley wins damages over weight slur
娱乐资讯:Victoria Beckham debuts fashion label in New York
娱乐资讯:Mom: Britney Spears just figuring things out
娱乐资讯:Harry Potters Hermione turns to modelling
娱乐资讯:Nicole Richie wins delay in drunken driving trial
Sienna Miller is the new spokesperson for Tods
娱乐资讯:Harry Potters Hermione turns to modell
娱乐资讯:Lohan to complete extended rehab program
LA DA: Lohan wont be charged with theft
Holmes says shes ready for more kids
娱乐资讯:Pitti: Dirk Bikkembergs underwear madness
娱乐资讯:Jessica Alba joins US immigration debate
No bean-toss prosecution for Hugh Grant
Holmes threatens legal action over imposter
安娜尼科尔透露最新消息
娱乐资讯:Blackbeard Beckhams latest new look
Jennifer Aniston and Vince plan romantic reunion in Chicago
Lace, a shinbone among Depps ideas for pirate fashion
娱乐资讯:Potter star Emma Watson voted Britains greatest female ambassador
娱乐资讯:Pamela Anderson fights Finland fur farms
娱乐资讯:Paris Hilton not eating or sleeping: report
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |