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
33
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、The workers on the underground 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、Computers began controlling the trains on the line.
答案
C
解析
What happened to the London underground railway?
转载请注明原文地址:https://tihaiku.com/zcyy/2980766.html
相关试题推荐
[originaltext](23)Almost20,000whaleshavebeenslaughteredsinceabano
[originaltext]M:Womenwhoaremarried,havechildren,andworkfeelguiltybec
[originaltext]M:Womenwhoaremarried,havechildren,andworkfeelguiltybec
[originaltext]M:Womenwhoaremarried,havechildren,andworkfeelguiltybec
[originaltext]M:Womenwhoaremarried,havechildren,andworkfeelguiltybec
[originaltext]DuringtheChristmasshoppingrushinLondon,aninteresting
[originaltext]W:Hi,ProfessorHiggins.M:Hi,Julia.W:Wouldyoubeabletoh
[originaltext]W:Hi,ProfessorHiggins.M:Hi,Julia.W:Wouldyoubeabletoh
[originaltext]M:Idon’tenjoydatinganymore,Ican’tseemtofindanyoneIha
[originaltext]M:Idon’tenjoydatinganymore,Ican’tseemtofindanyoneIha
随机试题
EuropeanimmigrantstoColonialAmericabroughtwiththemtheirculture,tr
Thegovernmenttriedto______thebookbecauseoftheinformationitcontainedab
Doctor’sorders;LetchildrenjustplayA)Imagineadru
发生学生伤害事故,不必及时告知未成年学生的监护人,学校应当及时救助受伤害学生;有
1994年我国取消双重汇率制度,实行以市场供求为基础的、单一的、有管理的浮动汇率
正常情况下酮体的产生是在A.肝脏 B.肾脏 C.胰脏 D.脑垂体
变更管理首要完成的任务是( )。A.分析变更的必要性和合理性,确定是否实施变更
借款人到贷款银行填报《个人住房借款申请表》并提交的材料有( )。A.借款人的身
生产控制的基本程序主要包括()。A.实施执行 B.编制生产计划 C.确定
根据《企业破产法》规定,管理人应当在召开债权人会议前通知已知的债权人,提前通知的
最新回复
(
0
)