閱讀理解
Light travels at a speed which is about a million times faster than that of sound. In one second, light travels about 300,000 kilometers, but sound travels only 344 metros. You can get some idea of this difference by watching the start of a running match. If you stand quite away from the starter(發(fā)令員), you can see smoke come from his gun before the sound reaches your ears.
The fast speed of light produces some strange facts. Sunlight takes about 8 minutes to reach us. If you look at the light of the moon tonight, remember that the light rays(射線)left the moon 1.3 seconds before they reached you. The nearest star is so far away that the light which you can see from it tonight to travel to you 4 years ago at a speed of nearly 2 million kilometers every minute. The light from some of tonight’s stars started on its journey towards you even before you were born.
Thus, if we want to be honest, we cannot say, “The stars are shining brightly tonight.” We have to say, “The stars look pretty. They were shining four years ago but their light has just reached out earth.”
1. The best title(題目)of this passage is ________.
[ ]
A. Light Travels Faster than Sound
B. Stars Are Very Far Away from us
C. The Speed of Light
D. It’s Not Correct to Say “The Stars Are Shining Brightly Tonight”
2. If you stand 200 metros away from a man who is firing a gun to start a running match, you will find out that ________.
[ ]
A. light travels a million times faster than sound
B. the smoke of the gun gets into your sight after the sound of the gun-shot
C. sound travels less fast than light
D. the sound of the gun will reach you at the same time with the light of the smoke
3. Sunlight obviously ________ than the light of the moon.
[ ]
A. has to travel a greater distance
B. moves less quickly
C. travels much more quickly
D. is less powerful
4. The scientific way of saying “The stars are shining brightly tonight” should be ________.
[ ]
A. the stars have been shining all the time
B. the stars seen tonight will be shining four years later
C. the stars were shining long ago but are seen tonight
D. the star light seen tonight could be seen four years ago
5. The light of the nearest star you see tonight has been ________ for years.
[ ]
A. on the earth B. on the moon
C. away from the sun D. away from itself
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科目:高中英語 來源: 題型:053
閱讀理解:
Man always wanted to fly. For hundreds of years they watched birds flying and wished that they could fly too. Birds fly very easily. Then they spread their wings and float on the air. The air keeps them up. Men know how to make kites hundreds of years ago. Kites could stay in the air for many hours. “If birds and kites can stay up in the air, perhaps we can,” they thought.
At first they made wings like birds. Then they jumped off high buildings and tried to fly. Many men did this but they all failed. After many failures they stopped trying to fly with wings. Then two brothers tried another way. They tried balloons. “Hot air is lighter than cold air,” they said, “That is why hot air goes upwards. If we fill a balloon with hot air, it will go upwards.”
After many experiments, they made two men go up in balloon full of hot air. A great crowd of people watched. The balloon rose to a height of 900 meters. The wind blew it along for nine kilometers. Then it came gently back to earth. For the first time man traveled through the air.
1. Hundreds of years ago man realized that birds fly easily because ______.
[ ]
A. there is air B. they are small
C. they have wings D. they are light
2. When some men tried to fly with wings, ______ succeeded.
[ ]
A. only a few of them B. only the two brothers
C. many of them D. none of them
3. Which of the following did men first think of when they wanted to fly?
[ ]
A. birds B. hot air C. balloons D. high buildings
4. Balloons seemed not a good way to travel because ______.
[ ]
A. they went too high B. they went too low
C. they were too big D. they were not easy to operate
5. Which of the following is not true?
[ ]
A. The first balloon were filled with hot air.
B. The first successful flight of man failed to be controlled by himself perfectly.
C. The balloon carrying people for the first time landed safely.
D. The first flight of man doesn’t seem to have much to do with their final success.
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