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At one time or another we have all stopped to think about the weather. Some days the weather is good. Some days the weather is bad. Sometimes a day that seems bad turns out better than you thought it would. There are ways of understanding the weather. One way is to study the clouds. No two clouds are ever alike. We can see the different kinds of clouds and watch them for signs of changing weather. To forecast the weather, there are three things about clouds. you should look for: movement, colour, and change. As a rule, the higher the clouds, the better the weather. And the lower the clouds, the worse the weather is likely to be. Fair-weather cumulus clouds* are another sign of good weather. These are clouds we often see on warm summer days. Clouds can tell you if a storm is on the way. If the thick, fluffy cumulus clouds get bigger early in the day, then you know it will rain. If there is a sudden, cool and dark thunder* cloud appears, then a storm is about to break out. Colours in the sky tell us about the weather, too. A golden ring around the moon warns us that a storm is on the way. A watery yellow sunset is a sign that rain may be near. The rainbow* has a message, too. The colours of the rainbow come from the sun rays shining through falling rain. If you see the sun in the east and a rainbow in the west, the rain may be coming your way. If the sun is in the west and the rainbow is in the east, the rain will be moving away from you.

1. According to this article, one way to understand the weather is to    .

A.study the clouds

B.monitor the temperature every hour

C.watch the signs of the wind

D.note the changes in wet

2. High clouds usually suggest     .

A.bad weather                           B.fine weather

C.rainy weather                          D.windy weather

3. The colours of the rainbow come from    .

A.sun rays shining through falling rain

B.dark thunder clouds in the sky

C.a golden ring around the moon

D.fair-weather cumulus clouds

4. Which of the following would be a good title for this article?

A.The Story of Weather Forecast

B.Fine Weather and Bad Weather

C.Weather Changes

D.Different Kinds of Clouds

5.We may say, take the article as a whole knowledge,      .

A.none of the clouds is the same

B.a storm is to come on soon after a sudden, cool and dark thunder cloud

C.the higher and cumulus clouds may be signs of warm weather

D.all of the above

 

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About ten men in every hundred have the trouble of color blindness in some way. Women are luckier, only about one in two hundred is affected(感染)in this matter. Perhaps, after all ,it is safer to be driven by a woman.
There are different kinds of color blindness. For example, a man cannot see deep red. He may think that red, orange and yellow are all shades (影子) of  green. Sometimes a person can’t tell the difference between blue and green. Only a few unlucky men may see everything in shades of green— a strange world indeed.
Color blindness in human beings is a different thing to explain. In only one eye there are millions of very small things called “cones(锥状细胞)” . These help us to see in the bright light and to tell differences between colors. These are also millions of “rods“(杆状细胞),but these are used for seeing when it is nearly dark. They show us shapes but not colors.
Some insects have favorite colors. Mosquitoes(蚊子) like blue but do not like yellow. A red light will not attract insects, but a blue light will. Human beings 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.
【小题1】“Color blindness” means           in Chinese.
A. 盲目        B. 无色      C 色盲    D 讨厌颜色
【小题2】 Some people say it’s safer to be driven by women because         .

A.women drive more carefully
B.women are better at driving than men
C.women can see things more clearly
D.there are fewer color — blind women
【小题3】With the help of the “cones”, we can          .
A.tell different shapesB.kill insets
C.see in the darkD.tell orange from yellow
【小题4】 We can attract and kill mosquitoes by using a           light.
A.redB.yellowC.blueD.green
【小题5】 Which of the following sentences about color blindness is TRUE?
A.None of men can see deep red.
B.Not all of men have the same problem in recognizing colors.
C.None of men can tell the difference between blue and green.
D.All of men see everything in shades of green.

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