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
2023-07-31
13
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, to check and to collect them when people leave the trains. This is all different of 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 send 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、It is the first completely automatic railway in the world.
B、The workers on the underground platforms are replaced by machines.
C、Its trains are computer-controlled.
D、Its trains run at a high speed.
答案
A
解析
What is the most special about the Victoria Line?
由选项中railroad,platform,train推测本题与列车和车站有关。本题关键句为“The world’s first complete
automatic railway has been built under the busy streets of London.”可知它是第一条完全自动化的铁路,所以正确答案为A)。
转载请注明原文地址:https://www.tihaiku.com/zcyy/2885925.html
相关试题推荐
[originaltext]Smartphonesdistractattentionandreducelearningbecauseof
[originaltext]Smartphonesdistractattentionandreducelearningbecauseof
[originaltext]Goodafternoon.Intoday’slecture,we’llbetalkingaboutho
[originaltext]Goodafternoon.Intoday’slecture,we’llbetalkingaboutho
[originaltext]InAmerica,mostresearchersconcedethatboysandgirlsare
[originaltext]InAmerica,mostresearchersconcedethatboysandgirlsare
[originaltext]Everyoneissupposedtocheerforgoodguys,andweshouldon
[originaltext]Everyoneissupposedtocheerforgoodguys,andweshouldon
[originaltext]Anewstudyhasfoundapositivecorrelationbetweenhowmuch
[originaltext]M:Hi,there!I’vecometoseetheflat.MynameisMarkAdams.W
随机试题
Ausefulexpressionisslippingintothelistofkeytranslationsusedbyno
AsthepoliticalconsequencesofNazismandtheliberaltoneofthe
—Doyouknowanythingaboutpaper-cut?—Well,I’veseenit______.A、beingdone
米切尔?福金曾在佳吉列夫芭蕾舞团出任首席编导。()
采用用正倒镜位置观测水平角取平均值可以消除仪器的()误差。A、视准轴不垂直于横轴
下边四个图形中,只有一个是由上边的四个图形拼合(只能通过上、下、左、右平移)而成
项目的财务内部收益率、财务净现值和静态投资回收期等财务分析指标可以通过()计算
环境保护“三同时”制度是指建设项目需要配套建设的环境保护设施,必须与主体工程(
下列关于组织论的说法正确的是()。A.组织结构模式是一种相对静态的组织关系
最新回复
(
0
)