首页
登录
职称英语
[originaltext] The world’s first completely automatic railway has been built
[originaltext] The world’s first completely automatic railway has been built
游客
2023-09-03
20
管理
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.
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
What is the task of the ore worker on the Victoria Line train?
转载请注明原文地址:https://tihaiku.com/zcyy/2981746.html
相关试题推荐
[originaltext]M:I’mgoingtotalktoyounowaboutthesuffragettemovement.W
[originaltext]M:I’mgoingtotalktoyounowaboutthesuffragettemovement.W
[originaltext]M:I’mgoingtotalktoyounowaboutthesuffragettemovement.W
[originaltext]M:I’mgoingtotalktoyounowaboutthesuffragettemovement.W
[originaltext]Inthepastindustrieshadmorefreedomthantheyhavenow,a
[originaltext]Inthepastindustrieshadmorefreedomthantheyhavenow,a
[originaltext][29]Moods,saytheexperts,arefeelingsthatarelikelyto
[originaltext][29]Moods,saytheexperts,arefeelingsthatarelikelyto
[originaltext][29]Moods,saytheexperts,arefeelingsthatarelikelyto
[originaltext]M:Ireallydon’tknowwhattodothissummer.Ican’taffordt
随机试题
最近对中国大陆1.8万名表示有兴趣在家教育孩子的父母进行的调查显示,其中约有2,000人已经开始在家给孩子上课。该调查由北京非政府组织21世纪教育研究院
[originaltext]W:John,doyouliketogoswimmingatthepoolwithmetoday?I’
Thisoldmanoftentalkedaboutthatsmalllake,______(过去他经常和朋友们在那儿游泳).wherehe
Adecadeago,theideathattheplanetwaswarmingupasaresultofhumana
女性,40岁,因咳嗽、胸痛来医院就诊,胸片及CT检查发现中纵隔内有一大小为4cm
依照《商业银行》,有下列情形之一的,接管终止( )A.按照接管决定规定的期限届
公司规模变动特征和扩张潜力一般与其()密切相关。 Ⅰ所处的行业发展阶段 Ⅱ市
患者,65岁。皮肤、巩膜黄染呈进行性加重,大便持续变白,病后消瘦明显。应首先考虑
某社会工作事务所希望能将一个新的商品房小区作为自己开展工作的基地。面对这样一个社
必须实施见证取样和送检的试块、试件和材料有()。A.用于承重结构的混凝土试块
最新回复
(
0
)