首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A、It is the first completely automatic railway in the world. B、The workers on the underground platforms are replaced by machines
A、It is the first completely automatic railway in the world. B、The workers on the underground platforms are replaced by machines
admin
2009-09-12
57
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, to check and to collect them when people leave the trains. This is all different of 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 send 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 is the first completely automatic railway in the world.
B、The workers on the underground platforms are replaced by machines.
C、Its trains are computer-controlled.
D、Its trains run at a high speed.
答案
A
解析
What is the most special about the Victoria Line?
由选项中railroad,platform,train推测本题与列车和车站有关。本题关键句为“The world’s first complete
automatic railway has been built under the busy streets of London.”可知它是第一条完全自动化的铁路,所以正确答案为A)。
转载请注明原文地址:https://kaotiyun.com/show/Ri37777K
0
大学英语四级
相关试题推荐
Since1975,Dr.Griffinhasbeenresearchingtheideaofanimalthinkingandtryingtomaketheideaanewscience.Heandother
A、Thecostofmakingpaper.B、Largemachinesandpaper-making.C、Thedevelopmentofpaper-making.D、Howtomakepaperbyhandt
HowExerciseCouldLeadtoaBetterBrainA)Thevalueofmental-traininggamesmaybespeculative,asDanHurleywritesin
A、Peoplecanhardlyenhancetheirintelligence.B、Peoplearebecomingsmarterastheyage.C、Allpeoplewerebornwiththesame
A、Televisionanditsinfluence.B、Televisionandhappiness.C、Televisionanditsadvantages.D、Televisionanditsdisadvantages.
Boeing’sLabourProblems—MovingFactoriestoFleeUnionsA)WithcorporateofficesinChicago,Boeingemploysmorethan1650
WhatdoweknowaboutIcebergWaterfromthepassage?Accordingtothepassage,whyisbottledwatersopopular?
Nationalstandardsforpavedroadswereinplaceby1921.Manyoftheproblemspresentedbythecountry’sgeographicalfeatures
A、Herguestsdon’tlikepunch.B、Herhusbandlefttwogallonsofpunch.C、Shehastoomanygallonsofpunch.D、Shewillrunout
A、Theyarenotbeautifulatall.B、Theyarequitecomfortable.C、Theyaretooexpensive.D、Theydeservemoremoney.CW:Let’sst
随机试题
胸骨角后方对气管分叉处,约相当于
证券公司在经营过程中应当按照( )的原则经营业务。
应交消费税的委托加工物资收回后用于连续生产应税消费品的,按规定准予抵扣的由受托方代扣代缴的消费税,应当计入()。
角色游戏过程中,教师介入时机不当的是()。
在意识能动性问题上唯心主义的错误在于()。
根据下面资料.作答以下问题:2004年~2009年年均R&D增长率与国内生产总值的年均增长率的比值为()。
行政处罚法规定的一系列保证行政处罚公开的制度有()。
类MyClass的定义如下,若要对value赋值,则下面语句正确的是()。classMyClass{public:MyClass(){)MyClass(inti){value=
PelterflyingacrosstheAtlantic,CharlesLindberghbecamefamous______.
WriteonANSWERSHEETTHREEanoteofabout50-60wordsbasedonthefollowingsituation:Asyouaretakinganexam,you
最新回复
(
0
)