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 sscattering 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 places see the lights. It helps drivers slow down or stop in time. So there will be fewer accidents. Moreover, 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.According to the passage, the scattering of the red light is the _______.
| A．longest | B．weakest | C．farthest | D．brightest |
The underlined word “wavelength” means________ in Chinese.
| A．光波 | B．波浪 | C．波长 | D．光波 |
What can the red light help drivers do?
| A．It can make drivers stop in time. |
| B．It can help drivers act more slowly. |
| C．It can help drivers see the lights in farther areas . |
| D．A and C |
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 |
| D．The colors of the traffic lights |
任务型阅读
下面是五段电视节目内容的解说词。请根据五段内容，在A--E中分别选择相应的电视节目名称。People might grow plants and vegetables in the sea in about 50 years.
The Lost World is an exciting American film.people,especially school students ,may like it better in free time.
Even if you could buy the world,you could not buy a happy family,good friends or knowledge.
For parents with children,an important problem is getting the children away from the television to do their homework.
When you need help for your homework, go to the library. You may find magazines, newspapers and big dictionaries there. They can always help you.
| A. Money isn’t Everything. B. Study Tools C. Parents’ Problems. D. Farms of the future. E. Activities for Free Time. |
What would you do if you found a snake in your house? Many people might be afraid or try to kill it. However, if you live in North Carolina in the USA,one thing you can do is to call the Snake Catchers.
The Snake Catchers are four men who love snakes, even poisonous ones. Theirnewspaper advertisement says, “Snake Catchers:free snakeremoval(除去）一Please do not kill them — Call us. ”
The Snake Catchers, who started their service in 1998, don’t charge anything for helping people. “We do this as a hobby,”explained Fred Johnson, one of the Snake Catchers. Because of their love of snakes, the Snake Catchers try to keep them alive.“One man asked us to kill a python(蟒蛇), so he could make a pair of boots from the skin. We refused, because we like snakes, and we don’t want to see them killed, ” said Fred. Some of the snakes that they catch are kept as pets;some are given to the North Carolina State University. Most, including the poisonous snakes, are set free in the wild, usually in a national park.
Fred suggests that people should treat snakes with care. “Actually snakes are very shy and gentle creatures. They only attack if they are frightened. However, you have to know how to treat a snake properly!”
According to one happy family, the Snake Catchers are good. One day, the Greenwood family found a snake skin in the kitchen. They looked very carefully and saw a snake sleeping behind a cupboard. They thought about what to do. Then Steve Greenwood remembered the advertisement for the Snake Catchers. He called them.
“The Snake Catchers arrived within an hour and they finished the job quickly too,” said Steve Greenwood. “One of them went into the kitchen, found the snake and took it out alive. The Snake Catchers did a very good job.”
Last year, the Snake Catchers removed more than seventy snakes from houses in North Carolina.The Snake Catchers catch snakes because .
| A．they want to kill the snakes. |
| B．they like trying to catch snakes. |
| C．they don’t want people to hurt snakes. |
| D．they like eating snakes. |
When a man asked them to kill a python,the Snake Catchers .
| A．agreed to do it | B．were very happy |
| C．give him some old boots | D．didn’t agree |
The Snake Catchers set most of the snakes free .
| A．in a national park | B．in a univercity |
| C．in a garden | D．in their own houses |
According to Fred, .
| A．snakes are very dangerous |
| B．people should attack snakes |
| C．snakes are not usually dangerous |
| D．people should run away if they see a snake |
Jack and James were good friends .One day,they were walking through the desert(沙漠).During the journey they had a big fight,and Jack hit james in the face.James felt hurt,but he didn’t say anything.Instead( 相反),he wrote in the sand:Today my best friend hit me in the face.
They kept on walking until they found an oasis(绿洲).They decided to get some water there .Suddenly James had trouble in the water,he fell into the mire(泥潭) and was in danger.Jack saved him at once.When he felt Ok,he wrote on a stone:Today my best friend saved my life. “After I hurt you ,you wrote in the sand, and now you wrote on the stone.Why?”asked Jack.“When someone hurts us,we should write it down in the sand so that the wind of forgiveness (宽恕) can blow it away.But when someone does anything good for us,we must write it down on the stone,so no wind can blow it away.” Since then ,the two friends have never fought with each other again.
Hatred(仇恨) can bring you nothing but unhappiness .If you don’t forgive others,you are making trouble for yourself.Keep a peaceful heart all the time and remember to be always thankful to those who ahve helped you!What’s the matter with James in the oasis?
| A．He wanted to make his friend have trouble ,too. |
| B．He wanted some water and fell into the mire. |
| C．He wanwed to know if his friend would save him when he was in trouble. |
| D．He wanted to have fun in the oasis. |
Which of the statements is not TRUE according to the passage.
| A．Jack didn’t hit James in the face. |
| B．Hatred can only bring you unhappiness. |
| C．The two friends went on walking after they had a fight. |
| D．They decided to get some water after they found an oasis. |
What can we learn from the passage?
| A．We should hate someone forever(永远). |
| B．The wind can blow everything away. |
| C．Learn to forgive others and remember to be thankful to others. |
| D．Forgiveness can make trouble for ourselves. |
| Learning How to learn ＄22 Children who read this book show great interest in study. May pictures will help them understand it easily and quickly. |
| Basic Study Guide book ＄36 Read this book and learn: What the three barriers（障碍）to study are and what to do about them. What to do if you are tired of a subject. Children read it to improve the ability（能力）to study. |
| How to use a Dictionary Picture Book for Children ＄35 Read this book and learn: How to look up words in a dictionary. What the different marks in a dictionary mean. How to use a dictionary to pronounce words correctly. But this book and help children unlock their education. What’s more you will just pay 60% for it before December 20 |
“____.” can tell you what to do if(如果)you are tired of a subject（课程）.
| A．Study skills for life |
| B．Learning How to Learn |
| C．Basic Study Guidebook |
| D．How to Use a Dictionary Picture Book for Children |
According to the ads（根据广告）the three books are for_____.
| A．the old | B．parents | C．children | D．men |
If(如果)you buy the three books on December 2, you will just pay ____ for them.
| A．$93 | B．$71 | C．$80 | D．$79 |
阅读下列短文，然后信息归纳。
Hello, I’m Linda. I have a big family. They are my grandfather, grandmother, uncle, aunt, father, mother, cousin and me. My uncle likes sports. He has a great sports collection. He has three volleyballs and two soccer balls. My aunt likes music. She has many CDs and tapes. My cousin likes playing computer games and eating fruit. He eats a lot every day. I like reading. I have many books. I love my family.There are有 __________people in the family.
Linda’s uncle has _________balls.
Linda’s aunt has _____________.
____________ likes playing computer games and eating fruit.
Linda likes __________________.