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A、In Victorian times. B、In 1969. C、In 1979. D、It’ s not clear. B推理题。本文介绍世界第一条全自动化铁路——伦敦地下铁的情况。在听短文之前,通过浏览选项得知,本题听录音时要特别注意各个时间的相
A、In Victorian times. B、In 1969. C、In 1979. D、It’ s not clear. B推理题。本文介绍世界第一条全自动化铁路——伦敦地下铁的情况。在听短文之前,通过浏览选项得知,本题听录音时要特别注意各个时间的相
admin
2012-10-30
55
问题
The world’s first totally automatic railway has been built under the busy streets of London. The railway is called the Victoria Line, and it is part of the complete London subway railway. It was opened in 1969. This new line was much different from others.
The stations on the other lines need a lot of workers to sell tickets, and to check and collect them when people board or leave the trains. Startling enough, the Victoria Line is very different from that old operating system. Here a machine checks and collects the tickets, and there are no workers on the platforms.
There is only one worker on the train of the Victoria Line. The man usually just starts it. The train runs and stops automatically. It is controlled by electrical signals which are sent by the so-called "command spots". Each spot sends a certain signal. The train always moves at the speed that the command spots permit. If the command sends no signals, the train will stop by itself.
Most of the control work is done by computers. The computers fix the trains’ speeds, and send the signals to the command spots. If one train stays too long at a station, the other trains will then automatically move slower. So there is no danger of accidents on the line.
选项
A、In Victorian times.
B、In 1969.
C、In 1979.
D、It’ s not clear.
答案
B
解析
推理题。本文介绍世界第一条全自动化铁路——伦敦地下铁的情况。在听短文之前,通过浏览选项得知,本题听录音时要特别注意各个时间的相关信息。此外还要推理出短文中一个“三段论”式的结构:世界卜最早的完全自动化铁路建造在伦敦地下,名叫Victoria Line,是伦敦地下铁的一部分;the Victoria Line地铁1969年开始运行。由此推理出:世界第一条全自动化的铁路出现于1969年。正确答案为B。
转载请注明原文地址:https://kaotiyun.com/show/kEw7777K
0
大学英语四级
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