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
37
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
ComingSoon:theNextGreatFluFpidemicThevirusfirstcameto
Ihearmanyparentscomplainingthattheirteenagechildrenarerebelling.I
InEngland,afternoontea,takenbetweenfourandfive,isthemost【11】meal
TheAfricanancestorsoftoday’sblackAmericanswerebroughttotheU.S.as
踝关节A.由胫骨下端,距骨联结而成 B.关节囊内外侧壁薄而松弛 C.外侧韧带
治疗虚劳肺气虚证,应首选的方剂是()A.清燥救肺汤 B.玉屏风散
共用题干 患者,男性,41岁。急诊入院,目前处于昏迷状态,患者呼吸时有痰鸣音并
无牙颌患者,戴全口义齿半个月。每天戴义齿时间较长后感觉面颊部酸胀。检查:患者鼻唇
(2018年真题)某金店(增值税一般纳税人)2019年5月发生如下业务: (1
上市公司满足短期融资需求时,一般采用发行股票方式进行融资。()
最新回复
(
0
)