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时间:2015-09-11 06:24:27
The group plans to use the Copper Vapor laser to improve the ability of the technique to see these vibrations and therefore allow a better understanding of the cause of them. The technique could also applied to look at the airbag enclosure as it tears and composite materials under dynamic crush testing.
6. How many uses of the laser-based analysis system does the author want to show us?
[A] One [B] Two [C] Three [D] Much more than three
7. Which of the following does the High Speed Imaging system comprise ________.
[A] an Oxford Lasers LS20 Copper Vapor laser
[B] 4540 Digital High Speed Motion Analysis system
[C] DRAM memory allowing immediate play back of the recorded images for viewing
[D] a High Speed Imagining Division of Oxford Lasers LTD.
8. Which of the following is the main advantage of the laser flashes?
[A] Keeping image contrast [B] getting rid of image blur
[C] Increase the intensity of light [D] All is said in A, B, and C
9. Which of the following uses is NOT TRUE according to the passage?
[A] The laser light can help to make the three dimensional bodies look as if they were of two dimensions.
[B] The air-flow can thus be made easier to be mapped with the laser.
[C] The turning speed of the combustion engine can be accelerated by using vapor laser.
[D] The exposure time of the camera can be reduced by the laser flashes.
10. Which of the following can be the best title of the passage?
[A]At the Speed of Light
[B] A High Speed Imagining Division Made by the Oxford Lasers LTD.
[C] A Miraculous Application of Laser in Testing the Internal Combustion Engine
[D] Automobile research and Laser Technology
答案： D A D C C
资料3：
When I was a little girl, my brothers and I collected stamps for many years. My mother didn't use to work during the week, but she worked in the post office near our house on Saturdays, and she used to bring home all the new stamps as soon as they were issued.
On the day of the World Cup football final in London in 1966, we were very excited because
We still have it today, and perhaps it is worth a lot of money.
11. This passage mainly tells us __________.
A. the author and her brother used to like stamps very much
B. the author had a very kind mother
C. the author and her brother had an unforgettable experience in collecting stamps
D. their mother used to support them by working in the post office
12. According to the passage, her mother worked in the post office ________.
A. during the week B. on Saturdays C. on Sundays D. for six days
13. Their mother told them to go to the post office straightaway after the match if
A. She wanted to give them a surprise.
B. She doubted if she would get the stamps.
C. She forgot to do that.
D. She thought it unnecessary to tell them the reason.
14. What does the sentence "We were over the moon." mean?
A. We jumped high. B. We were extremely happy about it.
C. We watched the moon for a long time.
D. We couldn't sleep the whole night.
15. What is the best title for this passage?
A. My Childhood.
B. My Mother.
C. A Precious Stamp.
D. A Memorable Experience in Collecting Stamps.
答案：.C B A B D
资料4：
You stare at waterfall for a minute or two, and then shift your gaze to its surroundings. What you now see appears to drift upward.
These optical illusions occur because the brain is constantly matching its model of reality to signals from the body’s sensors and interpreting what must be happening—that your brain must have moved, not the other; that downward motions is now normal, so a change from it must now be perceived as upward motion.
The sensors that make this magic are of two kinds. Each eye contains about 120 million rods, which provide somewhat blurry black and white vision. These are the windows of night vision; once adapted to the dark, they can detect a candle burning ten miles away.
Color vision in each eye comes from six to seve