首页
登录
职称英语
[originaltext] (32)The world’s first completely automatic railway has been b
[originaltext] (32)The world’s first completely automatic railway has been b
游客
2023-09-03
80
管理
问题
(32)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. (33)Here a machine checks and collects the tickets, and there are no workers on the platforms. On the train, there is only one worker. (34)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. (35)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.
32. What happened to the London underground railway over four decades ago?
33. Who checks and collects the tickets on the Victoria Line?
34. What is the task of the one worker on the Victoria Line train?
35. What will happen on the line if each train moves at its own speed?
选项
A、There will be danger of accidents on the line.
B、The train will run off the rails.
C、Their speeds will be automatically fixed by the computers.
D、The train will keep a safe distance from each other.
答案
A
解析
推理判断题。短文指出会有机器设定火车的速度,使其保持安全距离,这样就不会有碰撞的危险。由此可知,如果每列火车都按自己的速度任意行驶,不互相照应,就会有发生事故的危险。
转载请注明原文地址:https://tihaiku.com/zcyy/2982639.html
相关试题推荐
Theoldladyhasdevelopeda______coughwhichcannotbecuredcompletelyina
Theirdiplomaticprinciplescompletelylaidbaretheir_________forworldconqu
Theexaminationquestion______mecompletelyandIcouldn’tanswerit.A、blocke
Shesatdowntowriteheressay,butfoundshewascompletelywithout______.A、st
[originaltext]W:Areyoureallygoingtoquityourjob?M:Well...I’mnotsure.
[originaltext]W:Youcaneithergowithmeoryoucanstayhereattheapartmen
[originaltext]W:Youcaneithergowithmeoryoucanstayhereattheapartmen
[originaltext]W:Youcaneithergowithmeoryoucanstayhereattheapartmen
[originaltext]W:Youcaneithergowithmeoryoucanstayhereattheapartmen
[originaltext]Wethinkofaerobicsasbeingahighimpactactivitybutactu
随机试题
In1993,amallsecuritycameracapturedashakyimageoftwo10-year-oldbo
A:Whattimeisthismeetingsupposedtobegin?B:I’mnotsure.Ithoughtitwa
Whatistheconversationmainlyabout?[originaltext]W:Doyoulikesports?M:Yes
Satellitecommunicationsaresoup-to-datethatevenwhen______inthemiddleo
A.乙状结肠 B.左半结肠 C.横结肠 D.盲肠和右半结肠 E.回肠阿米
半夏厚朴汤的组成药物中不含()A.半夏 B.厚朴 C.白术 D.
在PowerPoint中,能够快速改变演示文稿的背景图案和配色方案的操作是(
(2018年真题)a石油公司通过b银行发放委托贷款,b银行行长认为该笔贷款b银行
对要使论证严密,富有逻辑性,必须做到的内容叙述不正确的是()。A:概念判断准确
根据监管要求,理财产品的销售起点金额不得低于10万元人民币(或等值外币)。(
最新回复
(
0
)