听下面一段对话,回答第22至第25题。
22-25
There are about 1 million blind people in the United States. The largest and most influential organization of blind people in this country is the National Federation of the Blind. The officials say that the nation doesn’t have any colleges or universities that only serve blind students. They say the reason for this is that blind people must learn to live among people who can see. American colleges and universities do accept blind and visually impaired students. They provide services to help these students succeed. For example, colleges find people who write down what the professors say in class and they provide technology that can help blind students with their work. However, experts say that colleges can best help blind students by making it clear that the students should learn to help themselves. One blind American student named T recently made news because he graduated from medical school from the University of Wisconsin. He said
A. The nation will set up colleges only for the blind students.
B. The nation will set up colleges only for the blind students when there is no discrimination against them.
C. For the financial concern, the nation won’t set up any colleges for blind students.
D. Since blind people need to study how to live among the others, they won’t build any special schools.
A.生麻黄
B.蜜麻黄
C.麻黄绒
D.蜜麻黄绒
E.醋麻黄
Glass, in one form or another, has long been in noble service to humans. As one of the most widely used of manufactured materials, and certainly the most versatile, it can be as imposing as a telescope mirror the width of a tennis court or as small and simple as a marble rolling across dirt.
41. ______
The uses of this adaptable material have been broadened dramatically by new technologies: glass fiber optics—more than eight million miles—carrying telephone and television signals across nations; glass ceramics serving as the nose cones of missiles and as crowns for teeth; tiny glass beads taking radiation doses inside the body to specific organs; even a new type of glass fashioned of nuclear waste in order to dispose of that unwanted material.
42. ______
On the horizon are optical computers. These could store programs and process information by means of light—pulses from tiny lasers—rather than electrons. And the pulses woul
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