听力题 The word laser stands for "light amplification by stimulated emission of radiation". To many people lasers are very (36) 1, but a laser is simply a (37) 2that produces a very strong light. The light from a laser is called (38) 3 light because it is light that moves in only one direction. In contrast, in light, like the light form the sun or a light , (39) 4, moves away from its (40) 5in all directions and (41) 6in a narrow beam. As soon as the laser was developed, scientists began thinking of practical (42) 7for it. One of the earliest uses was to make extremely (43) 8measurements of distance and speed. As time passed, many more for the laser were developed. (44) 9. From laser printers to technology by which whole encyclopedias of information can be stored on a laser disk (called a CD-ROM) and read by a computer, lasers are revolutionizing computers. Lasers have also made a big difference in the way telephones work. Instead of changing sound waves to electricity that travels through copper wire, (45) 10. One such fiber can carry more than a million conversations at the same time! (46) 11.
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【正确答案】 1、mysterious,    2、device,    3、coherent,    4、bulb,    5、source,    6、concentrated,    7、applications,    8、precise,    9、Over the past twenty years, personal computers have brought tremendous changes to the home and the workplace. And many of the most important developments in computer technology are based on lasers.,    10、the most modern telephone technology works by changing sound waves into pulses of laser light that travel through hair-thin glass fibers.,    11、These are just a few of the thousands of uses for lasers. The laser is truly becoming the light of the twenty-first century.    
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