首页
登录
职称英语
[originaltext] (32) The world’s first completely automatic railway has been
[originaltext] (32) The world’s first completely automatic railway has been
游客
2024-02-25
21
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.
(32)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. (33) Here a machine checks and collects the tickets, and there are no workers on the platforms.
(34)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 sports are the same distance apart. Each sends a certain signal. The train always moves at the speed that the command spots allow. (35)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、It will stop automatically.
B、It will move on at the same speed.
C、It will gradually slow down.
D、It will keep a safe distance from the other trains.
答案
A
解析
事实细节题。本题关键句为“If the command spot sends no signals,the train will stop.”如果指令点没有信号发出,火车会停下来。故正确答案为A。
转载请注明原文地址:https://tihaiku.com/zcyy/3482074.html
相关试题推荐
[originaltext]AmyJohnsonwasaveryambitiousandenergeticperson.Shedi
[originaltext]AmyJohnsonwasaveryambitiousandenergeticperson.Shedi
[originaltext]Alongwithjoggingandswimming,cyclingisoneofthebesta
[originaltext]Buyingahouseisalwaysanexpensivebusiness.Itisnotjus
[originaltext]M:Phew!Ihadtorunallthewaytomakeit.W:Youarealittle
[originaltext]M:I’dliketomailthispackagetoMinneapolis.W:Howwouldyou
[originaltext]M:I’dliketomailthispackagetoMinneapolis.W:Howwouldyou
[originaltext]M:I’dliketomailthispackagetoMinneapolis.W:Howwouldyou
[originaltext]MostofushaveanimageofsuchanormalorstandardEnglish
[originaltext]MostofushaveanimageofsuchanormalorstandardEnglish
随机试题
HarvestPiusProjectandItsHealthImpact1.HarvestPiusProjectaimstoh
Thevalueofhousesinmanybigcities__________(翻了一番还多)since199.hasmorethan
某医院预约系统的部分需求为:患者可以查看医院发布的专家特长介绍及其就诊时间;系统
预应力混凝土板的钢材为()。A.乙级冷拔低碳钢丝 B.CRB550冷拔带肋
共用题干 Intelligence一aChangedView1.Intel
共用题干 EarthquakeInsurance1.Earthquakei
患者,男性,55岁,1小时前因右侧腰背部剧烈疼痛,难以忍受,出冷汗,服颠茄片不见
信用风险是商业银行面临的最主要的风险,因此该类风险具有明显的系统性风险特征。(
如图所示,圆轴的扭矩图为:
女,21岁,2周前感冒,持续发热37.8~38.5℃,10天前出现情绪不稳定,打
最新回复
(
0
)