About ten men in every hundred suffer from color blindness in some way. Women are luckier; only about one in two hundred is affected (影响) in this matter. Perhaps, after all, it is safer to be driven by a woman!
There are different forms of color blindness. In some cases a man may not be able to see deep red. He may think that red, orange and yellow are all shadows(阴影) of green. Sometimes a person cannot tell the difference between blue and green. In few cases an unlucky man may see everything in shades of green—a strange world indeed.
Color blindness in human beings is a strange thing to explain. In a single eye there are millions of very small things called “cones”. These help us to see in a bright light and to tell difference between colors. There are also millions of “rods”, but these are used for seeing when it is near dark. They show us shape but no color.
Some insects (昆虫) have favorite colors.Mosquitoes prefer blue to yellow. A red light will not attract insects, but a blue lamp will. In a similar way human also have favorite colors.Yet we are lucky. With the help of the cones in our eyes we can see many beautiful colors by day, and with the help of the rods we can see shapes at night. One day we may even learn more about the hidden colors around us.
29. The passage is mainly about_______.
A.color blindness B. women being luckier than men
C. color and its surprising effects. D. danger caused by color blindness
30. According to the passage, with the help of the “cones”, we can_____.
A. tell different shapes B. kill mosquitoes
C. see in a weak light D. tell orange from yellow
31. Which of the statements (陈述) about the color- blind is TRUE?
A. None of them can see deep red
B. None of them can tell the difference between blue and green.
C. All of them see everything in shades of green.
D. Not all of them have the same problem in recognizing color.
32. We can attract and kill mosquitoes by using a________.
A. red light B. blue light C. yellow light D. green light
ADDB
A. Profits enlarging B. Technology developing C. Education investing D. Benefits transferring E. Dominance disappearing F. A nation rising |
The following is an imaginary diary entry written by US president. This diary is part of Global Trends 2025, which was written by the US National Intelligence Council
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The
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Global wealth and economic power will shift from West to East.
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The transition from old fuels to new will be slow, as will the development of new technologies that present feasible alternatives to fossil fuels or help eliminate food and water problems. All current technologies are inadequate, and new ones will probably not be commercially possible by 2025