The color “red on the sign means “ . A. pay the bill B. stop serving C. go on ser——青夏教育精英家教网—

If we are driving a car or crossing a street, we will stop when the traffic lights turn red. Why do we use red rather than other colors?
As we know, scattering (散射) happens when light goes through the air. For the same media, if the wavelength (波长) is long, the scattering will be short. If the wavelength is short, then the scattering will be long.
Of all light we can see red has the longest wavelength, so the scattering is the weakest. That means the red light travels far. In fact, it travels farther on rainy days.
Using the red light can help drivers in farther areas see the lights. It helps drivers slow down or stop in time. If drivers don’t see the red light until they are close, they may not be able to stop the car in time. An accident may happen. Red can also excite people. We can act more quickly when we see the color red.
In a word, red light helps drivers stop in time and help prevent accidents.
【小题1】______ has the longest wavelength of all light we can see.

A．red can make people happier	B．the scattering of red is very short
C．the scattering of red is very long	D．red can make people more excited

【小题4】The underlined word “prevent” means ______ in Chinese.

A．逃避

B．防止

C．处理

D．检查

【小题5】The passage mainly tells us ____________.

A．why accidents happen	B．how the red light travels
C．why we use red traffic lights	D．how to stop in time at traffic lights

查看习题详情和答案>>

Chinese people call the Spring Festival“Nian”. But do you know that Nian
was once the name of a monster(妖怪)?
　　A long time ago, the monster Nian lived in the mountains. It ate
animals. But in winter, it could not find food. So it came to villages and
ate a lot of people. People were so afraid of Nian that they locked their
doors before evening came during the winter. One day, an old man came to a
village. He told people there that Nian was afraid of three things——the
color red, fire and noise. He told people to play drums and gongs, make
big fires and set off fireworks(放鞭炮)to make Nian go away.
　　On a moonless, cold night, Nian went to the village again. As soon as it
opened its big mouth, people made loud noises and made fires. Nian was
really afraid and ran away. wherever it went, there was noise and fire.
When Nian was tired and could not run anymore, people killed the monster.
　　After that, on the coldest day of winter, people beat drums and gongs,
and set off fireworks to celebrate the death of the monster of Nian. They
put up red lanterns and have a big dinner without sleeping during the
night.
　　In the morning people greet each other happily. So now we have the
Spring Festival.
【小题1】 From the story, Nian seemed to be       long, long ago.
A exciting     B interesting    C boring   D terrible
【小题2】 The monster Nian ate people in winter because it          .
A wanted to make people afraid    B had no food to eat
C celebrated the Spring Festival    D liked to eat people in a village
【小题3】Nian was afraid of          .
A red    B fire   C noise    D A, B and C
【小题4】 The monster Nian wasn’t killed until          .
A it had eaten all the animals B the old man came to a village
C it was too tired to run away D people knew what it was afraid of
【小题5】 What is the best title for the passage?
A How the Spring Festival Came B What People did During Nian
C How People Celebrated Nian D What the Spring Festival was 查看习题详情和答案>>

Red is the color of China. Among all the colors, red is most   16 seen. The color red is fresh and pure, and in China we call it China Red. Chinese people are attracted by the color red not only because it makes people excited, but also because it has   17  meaning in Chinese culture and history.
No country in the world has ever   18  a color in such a way as China. Here, red is a symbol. It gives color to the soul (灵魂) of the nation. In the past, red represented dignity (尊严) and mystery. Even now, Chinese people   19  the color much more than the rest of the world does. It can be said that China Red is an everlasting theme for China, and an important color for the Chinese people. China Red has   20  a very popular phrase, attracting the world’s attention.
Finding red-colored things in China is very   21 , as you can see the color everywhere. All traditional red things have played special roles in China. Things like the walls of ancient palaces, the   22  flag, Chinese knots, lanterns, traditional paper-cuts, and even tanghulu are all red.
Red is the color of   23 , health, harmony, happiness, peace, wealth and so on. Only real things and events can fully   24  red’s real beauty. The color can be alive and breathing only when it’s connected with people.
In China, red is more than just a color. It carries the ancient history and   25  of the Chinese nation. China Red is filled with mysterious charm beyond description and it is right here in China waiting for you to feel and discover!

试题分类