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A、The workers on the platforms were replaced by machines. B、It became the first completely automatic railway in the world. C、A c
A、The workers on the platforms were replaced by machines. B、It became the first completely automatic railway in the world. C、A c
admin
2013-10-08
76
问题
The world’s first completely 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 underground railway. The new Victoria Line was opened in 1969. This new line was very different from the others. The stations on the other lines need a lot of workers to sell tickets, and to check and to collect them when people leave the trains. This is all different on the Victoria Line. Here a machine checks and collects the tickets, and there are no workers on the platforms. On the train, there is only one worker. If necessary, this man can drive the train. But usually he just starts it; it runs and stops by itself. The trains are controlled by electrical signals which are sent by the so-called "command spots". The command spots are the same distance apart. Each sends a certain signal. The train always moves at the speed that the command spots allow. If the command spot sends no signals, the train will stop. Most of the control work is done by computers. The computers also fix the train’s speeds, and send the signals to the command spots. Other machines make sure that the trains are always a safe distance apart. One train may stay too long at a station; the other trains will then automatically move slower. So there is no danger of accidents on the line.
22. What happened to the London underground railway over four decades ago?
23. Who checks and collects the tickets on the Victoria Line?
24. What is the task of the one worker on the Victoria Line train?
25. What will happen on the line if each train moves at its own speed?
选项
A、The workers on the platforms were replaced by machines.
B、It became the first completely automatic railway in the world.
C、A completely automatic line was added to its network.
D、Its trains were all controlled by the computer.
答案
C
解析
事实细节题。短文开头提到1969年,伦敦第一条全自动火车线建成,这条火车线是伦敦地铁的一部分,就建在伦敦最繁华的街道下,起名为“维多利亚线”。由此可知,40多年前,伦敦地铁线路中出现了第一条全自动铁路线。
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0
大学英语六级
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