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
49
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; and 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 drive it when necessary.
C、To take care of the passengers in the train.
D、To send commanding signals to the command spot.
答案
B
解析
What is the task of the one worker on the Victoria Line train?
转载请注明原文地址:https://tihaiku.com/zcyy/2980767.html
相关试题推荐
[originaltext]Exportersaregoingtohavetochangeiftheyhopetopenetra
[originaltext]W:Soyoureallybelievethatclothescarryakindofmessagefor
[originaltext]W:Soyoureallybelievethatclothescarryakindofmessagefor
[originaltext]W:Oh,it’ssocold.Wehaven’thadsuchaseverewinterforsol
[originaltext]W:Oh,it’ssocold.Wehaven’thadsuchaseverewinterforsol
[originaltext]W:Oh,it’ssocold.Wehaven’thadsuchaseverewinterforsol
[originaltext]W:Oh,it’ssocold.Wehaven’thadsuchaseverewinterforsol
[originaltext]W:Oh,it’ssocold.Wehaven’thadsuchaseverewinterforsol
[originaltext](33)InyearstocomeourcurrenteramayberememberedasThe
[originaltext]Astudentcreditcard?Isitrightforme?Canithelpmepay
随机试题
ManytreesintheBrackhamareawerebroughtdownintheterriblestormstha
——Youseemtoshowinterestincooking.——What?________,I’mgettingtiredofit
Seekingtobuildsupportamongblackfamiliesforitseducationreformlaw,
A、Whenotherareasofyourlifebeginstobeaffected.B、Whenyoubegintofeel
Whowillbecomenearsightedeasily?Peoplewhodoalotof______willbecomenea
扬州,时称广陵,其建城可追溯至公元前(B.C.)486年。TheestablishmentofYangzhouwhichwascalledGuan
某男性患者,70岁,两日来心中悸动不安,头眩,畏寒肢冷,下肢浮肿,渴不欲饮,恶心
Thedoctormayrecommendlimitingtheam
第斯多惠说一个坏的教师奉送真理,一个好的教师则教人发现真理。”这句话体现了()
A.直接或间接传播 B.飞沫传播 C.内源性感染 D.血液传播 E.垂直
最新回复
(
0
)