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
2024-05-06
45
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/3586877.html
相关试题推荐
[originaltext]Theworld’ssmartestadolescentsinmathematicsandsciencea
[originaltext]TeadrinkingwascommoninChinafornearlyonethousandyear
[originaltext]W:ProfessorWilson,canyousparemeafewminutes?M:That’sOK
[originaltext]W:ProfessorWilson,canyousparemeafewminutes?M:That’sOK
[originaltext]W:ProfessorWilson,canyousparemeafewminutes?M:That’sOK
[originaltext]W:ProfessorWilson,canyousparemeafewminutes?M:That’sOK
[originaltext]W:Doyouthinkyoucangiveanexactdefinitionof"management",
[originaltext]W:Doyouthinkyoucangiveanexactdefinitionof"management",
[originaltext]TheUnitedStatesisprimarilyanEnglishspeakingcountry.T
[originaltext]TheUnitedStatesisprimarilyanEnglishspeakingcountry.T
随机试题
[audioFiles]audio_ehbm_j24001(20082)[/audioFiles]A、Thankyou.B、Icanmanageit
Whatdoesthemanthinkaboutcareerconsultation?[originaltext]M:Excuseme,b
巴尔扎克的《人间喜剧》在创作风格上属于()A.古典主义 B.自然主义 C.
使用煤炉取暖,必须提前()。A.备好器材燃料 B.提出使用方案和放火措施审
BCR对抗原的识别特点不包括A.识别抗原的半抗原决定基 B.需APC摄取、处理
普通股票股东享有的权利主要包括( )。A.公司重大决策的参与权 B.公司盈余
下面谱例出自一首民歌,它的体裁是()。 A.信天游 B.长调 C.劳动
特殊机构及产品证券账户在开立及使用中应严格遵守账户实名制有关要求,下列要求表述错
牛黄具有的功效是( ) A.清热解毒 B.化痰开窍 C.息风止痉 D.
贷款发放的原则主要有()。A.计划、比例放款原则 B.不定期放款原则
最新回复
(
0
)