阅读理解. When the traffic lights turn red, we will stop driving a car or crossing a street. Why is red used fortraffic lights instead of other colors? As we know, scattering happens when light goes thro 题目和参考答案——青夏教育精英家教网—

阅读理解。

     When the traffic lights turn red, we will stop driving a car or crossing a street. Why is red used for
traffic lights instead of other colors?
     As we know, scattering (散射) happens when light goes through the air. For the same media (媒质),
if the wavelength is long, the scattering will be short. If the wavelength is short, then the scattering will
be long.
     Of all lights 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 sec the lights. It helps drivers stow down or stop
in lime. 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 lights help drivers stop in time and help prevent accidents.

1. When the traffic lights turn ______, we will stop driving a car.

A. red
B. green
C. yellow

2. According to the passage, the scattering of the red light is the _______.

A. longest
B. weakest
C. farthest

3. The underlined word "wavelength" means________ in Chinese.

A. 波浪
B. 光波
C. 波长

4. What can the red light help drivers do?

A. It can help drivers in farther areas see the lights.
B. It can help drivers slow down or stop in time.
C. A and B

5. Which of the following is the best title?

A. Why do accidents happen
B. How does the red light travel
C. Why do we use red traffic lights

1-5 ABCCC

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阅读理解

　　Helping your children to read and write at home will improve their skills and confidence－it will also make them get ready for learning in the classroom environment．

　　________are needed by every child in every subject in every year of their life in or outside school．Students who improve their reading and writing skills will increase their vocabulary and their ability(能力)to use the English language correctly．As parents, you can play an important role in improving your children's literacy(读写能力)．You can make a difference by listening, asking questions, giving information, and reading with your children outside school hours．

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◆trying to ask more “wh－” questions instead of easy “yes” or “no” questions

◆encouraging your children to talk about events you don't know

◆reading to your children each night

◆listening to your children read

◆teaching your children how to use dictionaries

◆talking about your children's writings

◆practicing filling in forms, writing letters, sending cards or emails

　　You can also encourage your children to join the Reading Challenge Club and discuss the books they are reading together．In the club, children must read 15 books from the Challenge book list and 5 more books chosen by themselves．There are over 1, 000 books on the list．The reading must be done in one year．What's more, it is a wonderful way to help your children to write．For example, you can encourage them to write diaries or book reviews．Remember to make positive comments as much as possible．

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D．	“Talking about your children's writings”

(4)

In the Reading Challenge Club, children have to read________in one year．
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Parents can help children to write by encouraging them to________．
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阅读理解。

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