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
2023-08-30
66
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 one worker on the Victoria Line train?
转载请注明原文地址:https://tihaiku.com/zcyy/2970613.html
相关试题推荐
[originaltext]Asthetwentiethcenturybegan,theimportanceofformaledu
[originaltext]PeoplefellinlovewithElizabethTaylorin1944,whenshes
[originaltext]W:Hello,Michael.Wouldyoucometomyofficeforaminute?Iwa
[originaltext]F:SusanBauerspeaking.M:Dr.Bauer,mynameisTomWhite.Myr
[originaltext]F:SusanBauerspeaking.M:Dr.Bauer,mynameisTomWhite.Myr
[originaltext]F:SusanBauerspeaking.M:Dr.Bauer,mynameisTomWhite.Myr
[originaltext]W:Howdoyoulikeyournewtenantwhomovedtoyourapartmentla
[originaltext]W:Howdoyoulikeyournewtenantwhomovedtoyourapartmentla
[originaltext]W:Howdoyoulikeyournewtenantwhomovedtoyourapartmentla
[originaltext]W:Howdoyoulikeyournewtenantwhomovedtoyourapartmentla
随机试题
Ifelt______todeathbecauseIcouldmakenothingofthechairman’sspeech.A、f
[originaltext]Believeitornot,opticalillusionscancuthighwaycrashes.J
Inbusiness,manyplacesadoptacreditsystem,whichdatesbacktoancient
ElectronicpetsaresweepingChina’slargecitiesastheyhaveelsewhereinA
平稳随机过程是指它的概率密度函数与时间起点有关。()
材料三中的小故事所蕴含的哲理是()。 A.世界是客观存在的物质世界 B.认识
药物经济学评价的作用不包括A:药物治疗与其他疗法的经济学评价 B:药师实施临床
劳动保障法不包括()。A:促进就业法 B:社会保险法 C:工作时间法
简述遗赠和遗赠扶养协议的区别。
甲公司为建造固定资产于2×18年4月1日向银行借入一笔期限为5年,年利率为5.4
最新回复
(
0
)