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
2024-06-03
23
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、A platform worker.
B、A computer.
C、The command spot.
D、A machine.
答案
D
解析
预览选项可知,本题考查人物身份,问题针对who提问。问题询问的是谁一直检查 Victoria铁路线的车票。根据文中提到的The stations on the other lines…collects the tickets可知,维多利亚线上用机器而不是工人进行所有检票和收票的工作,故D为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3618122.html
相关试题推荐
[originaltext]Sciencefictionwritershaveoftenimaginedhumanbeingsgoin
[originaltext]WehavetendedtoviewYogaasakindofforeignreligiousex
[originaltext]WehavetendedtoviewYogaasakindofforeignreligiousex
[originaltext]WehavetendedtoviewYogaasakindofforeignreligiousex
[originaltext]M:Ihaveaspecialguesttoday,Shirley.Shirley,youtrulyhave
[originaltext]M:Ihaveaspecialguesttoday,Shirley.Shirley,youtrulyhave
[originaltext]M:Ihaveaspecialguesttoday,Shirley.Shirley,youtrulyhave
[originaltext]W:Hey,Mike!Whereamyouoffto?M:I’mheadingforthePriceC
[originaltext]M:IfyouseeyourfriendJuliainthenextcoupleofdays,would
[originaltext]M:IfyouseeyourfriendJuliainthenextcoupleofdays,would
随机试题
ConstantvariationsintheamountofsunlightavailableonEarthatanygive
根据下面资料,回答问题潞安某矿煤矿储运处发生一起重大触电伤亡责任事故,6人触电,
测量身体活动水平的大小,应考虑选择的指标是()A.代谢当量、每周运动的天数、每
伤寒病人解除隔离的主要标准是()A.体征消失 B.症状消失,大便培养连续
病人狂躁妄动,胡言乱语,少寐多梦,打人毁物,不避亲疏属()A.狂病 B.
站控层交换机连接()网关机、监控主机、综合应用服务器等设备以及间隔层的保护、测能
()是我国第一部纪传体史书。A.《战国策》 B.《左传》 C.《诗经》
体内常见的高能磷酸化合物是因为其磷酸酯键水解时释放能量(kj/mol)为A.>1
非概率抽样的具体方式有()。A.整群抽样 B.分层抽样 C.判断抽样 D
根据《建设工程质量管理条例》,未经()签字,建筑材料、建筑构配件和设备不得在工程
最新回复
(
0
)