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
2024-03-03
41
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 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 from 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. 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、The workers on the underground platforms were replaced by machines.
B、It became the first completely automatic railway in the world.
C、A completely automatic line was added to its network.
D、Its trains became computer-controlled.
答案
B
解析
What happened to the London underground railway about three decades ago?
[听前预测] 由选项中的underground platform,replaced,first,added,computer-controlled可推断本题可能与地铁的改进有关。
[答案详解] 细节辨认题[考频:16]。本题关键句为“The world’s first completely automatic railway has been built under the busy streets of London... The new Victoria Line was opened in 1969.”1969年第一条全自动地铁在伦敦开通。故正确答案为B)。
转载请注明原文地址:https://tihaiku.com/zcyy/3502350.html
相关试题推荐
[originaltext]Hello,everyone.Today,I’dliketotalkaboutmotivation.Mo
[originaltext]Hello,everyone.Today,I’dliketotalkaboutmotivation.Mo
[originaltext]Moderator:Hello,ladiesandgentlemen.Itgivesmegreat
[originaltext]Moderator:Hello,ladiesandgentlemen.Itgivesmegreat
[originaltext]GailArmandandRobertVanSluishadaplanfortheirretirem
[originaltext]GailArmandandRobertVanSluishadaplanfortheirretirem
[originaltext]GailArmandandRobertVanSluishadaplanfortheirretirem
[originaltext]GailArmandandRobertVanSluishadaplanfortheirretirem
[originaltext]Studentswhostruggledearlyonwithbasicreadingandmaths
[originaltext]Studentswhostruggledearlyonwithbasicreadingandmaths
随机试题
TaskSheet:OverseasOffices1.Yourcompanyneedstoopenoverseasofficesfor
Moreandmoreoftheworld’spopulationarelivingintownsorcities.Thes
《期刊出版形式规范》要求,CN应按规定格式印在期刊的( )。A.封面 B.扉
针入度试验过程中,对试验结果产生影响的因素包括()A.试验温度 B.下沉时间
()属于组合单位。A:立方米 B:秒 C:每米 D:千克
A.天冬B.砂仁C.鲜生地D.乳香E.硼砂易腐烂的是
女性,妊娠34周,食欲佳,每日吃苹果3~4个。产前检查,全身无水肿,上周体重增加
1949年,美国学者泰勒出版的《课程与教学的基本原理》,提出了课程编制的“四段论
棒框仪通常用来研究的问题是A.注意分配 B.手眼协调 C.知觉动作学习 D
茶碱属于A.M胆碱受体阻断剂 B.黄嘌呤类药物 C.白三烯调节剂 D.β肾
最新回复
(
0
)