题目内容
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.
1.______ has the longest wavelength of all light we can see.
A. Red B. Green C. Yellow D. Black
2.Red light travels farther on ______ days.
A. windy B. sunny C. rainy D. cloudy
3.Red can make people act more quickly because ____________.
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
4.The underlined word “prevent” means ______ in Chinese.
A.逃避 B. 防止 C. 处理 D. 检查
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
1.A
2.C
3.D
4.B
5.C
【解析】略
口算能手系列答案A famous teacher was speaking to the students at our school. He began his lesson by holding up a ￥100 bill. Then he said to the three hundred students， “Who would like this ￥100 bill？” The students began to put up their hands at once.
Then he said， “I am going to give this ￥100 to one of you， but first， let me do this.” He then made the bill into a ball. Then he said， “Who wants it now？” The hands went back into the air.
“Well，” he said， “What if I do this？” and he dropped it on the floor and stepped on it. He picked up the dirty， crumpled bill and said， “Who still wants it？” Hands went back into the air.
“My friends，” he said， “you have learned a valua-ble lesson today. No matter what I did to the money， you still wanted it because it did not go down in value （价值）。 It was still worth ￥ l00！”
Many times in our lives， we are dropped， crum-pled， and stepped on by the chances we take and the things that happen to us. We feel as if we are worth nothing. But remember， no matter what has happened to you， you will never lose your value： you are always valuable to those people who love you. Your value doesn‘t come from what you do or whom you know， but WHO YOU ARE.
You are special and valuable. Don‘t ever forget it！
【小题1】Even though it was dirty， the money _______.
| A．still went up in value | B．was worth nothing |
| C．didn‘t go down in value | D．was still ours |
| A．who pay us | B．who call us |
| C．who hate us | D．who love us |
| A．the students put up their hands again |
| B．the students put down their hands |
| C．the students put their hands behind their backs again |
| D．the students put their hands in front of them |
| A．Because he wanted to make the bill into a ball. |
| B．Because he used to drop a bill on the floor and stepped on it. |
| C．Because he was going to give the bill to one of his students. |
| D．Because he wanted to make the students know what value was. |
阅读短文，从方框中选择行当的词并用其正确形式填空，使短文意思通顺、完整。请将答案写在短文后相应题号的横线上。每空限填一词，每词限用一次。方框中有两个词是多余的。
| dirty with have always time they large want speak lesson first drop |
“My friends,” he said，“you have learned a valuable(有价值的)【小题7】 today．No matter what I did to the $100 bill! Many 【小题8】 in our life，we are dropped and stepped on．We feel as if we are worth nothing．But remember, no matter what 【小题9】 happened to you，you will never lose your value：You are 【小题10】 valuable to those people who love you．Your value doesn’t come from what you do or whom you know, but who you are．’’
After a quick breakfast, I went into the lecture(讲座) hall in a hurry. A famous teacher was speaking to the students. He was holding up a $100 bill. Then he said to over 300 students, “ Who would like this $100 bill?” The students put up their hands at once. Then he said, “I am going to give this $100 bill to one of you, but first, let me do this.” He made the bill into a ball. Then he said, “Who wants it now?” The hands went back into the air. “Well,” he said, “What if I do this?” and he dropped it on the floor and stepped on it. He picked up the dirty bill and said, “Who still wants it?” Hands went back again into the air.
“My friends,” he said, “you have learned a valuable lesson today. No matter what I did to the $100 bill, you still want this bill. Many times in our life, we are dropped and stepped on. We feel as if we are worth nothing. But remember, no matter what has happened to you, you will never lose your value. You are always valuable to those people who love you. Your value doesn’t come form what you do or whom you know, but who you are.”
1.The lecture was given _____________.
|
A．in the morning |
B．at noon |
C．in the afternoon |
D．in the evening |
2.How many students went to listen to the lecture?
|
A．Sorry, I don’t know |
B．Over 100. |
|
C．Over 200. |
D．Over 300. |
3.What did the teacher do before he said, “Who still wants it?”
|
A．He did nothing. |
B．He made the bill dirty. |
|
C．He put the bill into a box. |
D．He put up his hand. |
4.The lesson tells us a truth, that is____________.
|
A．we should know what we do |
|
B．we should know whom we know |
|
C．we must know who we are |
|
D．how to use money |