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    All of us like our world, the world. 【查看更多】

     

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    About ten men in every hundred have the trouble of colorblindness in some way. Women are luckier, only about five in every hundred are affected in this matter. Perhaps, after all, it is safer to be driven by a woman.

    There are different shapes of color blindness. For example, a man may be able to see deep red. He may think that red, orange and yellow are all shades of green. Sometimes a person can not tell the difference between blue and green. Only a few unlucky men may see everything in shades of green-a strange world indeed.

    Colour blindness in human beings is a strange thing to say clearly. In only one eye there are millions of very small things called “cones①”. These help us to see in a bright light and to tell difference between colours. There are also millions of “rods②”，but these are used for seeing when it is nearly dark. They show us shapes but no colours. Some insects have favourite colours. Mosquitoes③ like blue but do not like yellow. A red light will not attract insects, but a blue light will. Human beings also have favourite colours. Yet we are lucky. With the help of the cones in our eyes we can see many beautiful colours by day, and with the help of the rods we can see shapes at night. One day we may even learn more about the invisible④ colours around us.

    生词注释：①cone n.锥形物　②rods n.棒　③mosquitoe n.蚊子　

    　　　　　④invisible adj.看不见的

    1.“colour blindness”means       in Chinese.

           A.色盲                        B.颜料                    C.盲目                   D.瞎

    2.Why do some people say it is safer to be driven by women?

           A.Women are better at driving than men.

           B.Women are more careful.

           C.There are fewer colour blind women.

           D.Women are friendly to people.

    3.With the help of the “cones”, we can      .

           A.tell different shapes   B.kill insects

           C.see in a weak light     D.tell orange from yellow

    4.We can attract and kill mosquitoes by using a       light.

           A.red                          B.yellow                 C.blue                    D.green

    5.Which of the following sentences about the colour blindness is TRUE?

           A.None of them can see deep red.

           B.Not all of them have the same problem in recognizing(识别)colour.

           C.None of them can tell the difference between blue and green.

           D.All of them see everything in shades of green.

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    请仔细阅读下文，然后根据短文内容选择正确答案。
         If someone ask you, "What colour is the sky?"I think you will answer "Blue".I'm afraid that you will be
      wrong. The sky has no colour. It looks blue because we are looking at blue sunlight. The sunlight is
     shining on little bits of dust ( 灰尘) in the air.
         Is the sky full of air? I'm sure that you have asked this question, too. We know that there is air all
     around the world, but we couldn't fly very high because as we go higher, the air gets thinner. If we go far
      enough away from the earth, we find there is no air.
         Maybe we can answer some questions now. What is the sky? Where is it? It is all round the world. The
      sky is space (宇宙空间). In space there is nothing, but only the sun, the moon, and all the stars.
    1. We often think the sky is blue because _____.
        A. we think it is so
        B. we like this colour
        C. we don't have other colours
        D. we don't like other colours
    2. The sky is _____.
        A. a star round it
        B. a big ball with air all
        C. full of dust
        D. space with  the sun, the moon and the stars
    3. What makes us think the sky is blue?
        A. Dust in the sky.
        B. Air and blue light.
        C. Our own feeling.
        D. Both A and B.
    4. We can't fly very high because _____.
        A. there's too much air in the high place
        B. the high sky is full of dirty air
        C. there is no air in the high enough sky
        D. the sun is too hot
    5. The writer of the passage _____.
        A. tells us something about the sky
        B. wants to tell us not to go to space
        C. once flew in the sky
        D. enjoys answering people's questions

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