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
2024-04-30
6
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.
22. What happened to the London underground railway over four decades ago?
23. Who checks and collects the tickets on the Victoria Line?
24. What is the task of the one worker on the Victoria Line train?
25. What will happen on the line if each train moves at its own speed?
选项
A、A platform worker.
B、The command spot.
C、A computer.
D、A machine.
答案
D
解析
事实细节题。短文中指出,在“维多利亚线”上,是机器在进行检票和回收车票的工作,站台上一个工作人员都没有。
转载请注明原文地址:https://tihaiku.com/zcyy/3577305.html
相关试题推荐
[originaltext]Eventhemostenthusiasticshopperhasabaddaysometimes:(
[originaltext]W:You’rebusyrunningtheFamiliesandWorkInstitute.(23)Whyd
[originaltext]M:Ilikeyournewposter.Didyoubuyitinthesupermarket?W:
[originaltext]M:Welcomeback.Well,didyouenjoyyourtrip?W:Itwasfascin
[originaltext]W:I’dliketogotoyourbarbecueonSunday.Butmygoodfriend
[originaltext]M:Whynotaskyourbosstowritealetterofrecommendationfor
[originaltext]W:Iamverysorrytohearthatthecomputeryouboughtfromour
[originaltext]Supposesomeoneinventedagiftcardsoversatile(多功能的)that
[originaltext]Overthepastsixweeks,Nicky,42,hascutherdailyroutine
[originaltext]W:I’mFaithDonnelly.Thisweekonourprogram,wewilltalkabo
随机试题
TVLinkedtoLowerMarksA)Theeffectoftelevisiononchild
设(X1,X2,…,Xn)(N≥2)为标准正态总体X的简单随机样本,则().
在乙16周岁生日当天,甲、乙在肯德基一起为乙过生日。甲、乙发现赵某(13
Numbersenseisnottheabilitytocount
患者,女性,31岁,工人。因腕及掌指关节肿痛,伴双膝关节疼痛、行走困难而入院。入
传染病的早期诊断中主要测定血清中的A.特异的IgE B.特异的IgA C.特
上消化道出血最常见的原因是()A.慢性胃炎 B.食管胃底静脉曲张 C.胃癌
电缆主绝缘、单芯电缆的金属屏蔽层、金属护层应有可靠的()措施。(A)过电压保护
下列属于《公安部关于修改<建设工程消防监督管理规定)的决定》(公安部令第119号
2017年3月1日,甲公司聘请魏某为公司技术部门经理,双方在劳动合同中
最新回复
(
0
)