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A、To drive the train after it is started automatically. B、To start the train and to drive it when necessary. C、To take care of t
A、To drive the train after it is started automatically. B、To start the train and to drive it when necessary. C、To take care of t
admin
2009-09-12
81
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 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 from 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. 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、To drive the train after it is started automatically.
B、To start the train and to drive it when necessary.
C、To take care of the passengers on the train.
D、To send commanding signals to the command spot.
答案
B
解析
[听力原文]
What is the task of the worker on the Victoria Line train?
[听前预测] 四个选项均以动词不定式符号To开头,由此可知本题考查某种行为,根据选项中的drive,start,take care of,send等词,推断本题可能询问工作人员的工作职责。
[答案详解] 事实细节题[考频:63]。本题关键句为“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.”火车上只有一名工作人员。如果需要的话由他来驾驶火车,不过通常他只需启动火车,火车能自动运行和停止。故正确答案为B)。
转载请注明原文地址:https://kaotiyun.com/show/cl37777K
0
大学英语四级
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