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、To drive the train after it is started automatically. B、To start the train and drive it when necessary. C、To take care of the
A、To drive the train after it is started automatically. B、To start the train and drive it when necessary. C、To take care of the
admin
2013-01-22
36
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; and 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.
选项
A、To drive the train after it is started automatically.
B、To start the train and drive it when necessary.
C、To take care of the passengers in the train.
D、To send commanding signals to the command spot.
答案
B
解析
What is the task of the one worker on the Victoria Line train?
转载请注明原文地址:https://kaotiyun.com/show/51I7777K
0
大学英语六级
相关试题推荐
A、Hewillbuyanewcoatforthewoman.B、Hewillbuyastovetocook.C、Hewillgobackhome.D、Hewillcookasoup.C女士说今天的风很大
AResponsibilityRevolution"Wehavealwaysknownthatheedlessself-interestwasbadmorals,"FDRsaidin1937,inthemids
Don’tworry,behappyand,accordingtoanewresearch,youwillalsobehealthy.Itisestimatedthatoverthecourseofon
A、Hewilltakeacoffeebreak.B、Hewillkeeponworking.C、Hewillgoforawalk.D、Hewillbeginwiththereport.B由男士提到的Iwis
A、Hercomputerdoesn’tworkwell.B、Sheisn’tgettingalongwithherstaff.C、Shedidn’tregisterforapropercourse.D、Shecan
A、ThespeakermakesfunofthePresident.B、Thespeakerthinkshighlyofthefilm.C、ThespeakerisafanofHollywoodcomedies.
He______alettertoanInternetservicethatdistributesjournalists’questionstomorethan750institutions.
Briefholidaysoffourdaysorlessoffertravelersarestorationfromtheroutine______(还能免去长假带来的压力和花费).
Kunzgaveupsoftwareengineeringmainlybecauseheearnedlessthanthoseinlaworbusinessfielddid.Manycompaniesencoura
AdamRappoporthasthesamefamiliaritywithakeyboardaswellasthetouch-tonepadonthephone.TheInternet’s______progr
随机试题
血吸虫病的基本病理变化
某市检查健康女性144人的血红蛋白的含量,得均数为12.20g/L,标准差为1.0g/L,那么该地健康女性血红蛋白的含量医学参考值范围为
关于人民陪审员,下列哪些选项是正确的?(2007—卷二—70,多)
下列说法错误的是()。
宏观经济政策工具是用来达到政策目标的手段,下列不属于宏观政策工具常用手段的是()。
某外商投资企业2011年度利润总额为40万元.未调整捐赠前的所得额为50万元。当年“营业外支出”账户中列支了通过当地教育部门向农村义务教育的捐赠5万元。该企业2011年应缴纳的企业所得税为()。
迁移
已知下列汇率:即期汇率1个月远期美元/瑞士法郎1.4860—7037—28英镑/美元1.6400—108—16问:瑞士法郎兑英
Earthquakes66.AttwominutestonooninSeptember1of1923,thegreatclockinTokyostopped.67.TokyoBayShookasifh
A、Sheisaquiteyounglady.B、Sheismiddle-aged.C、Sheis40yearsold.D、Sheisoftheretirementage.B
最新回复
(
0
)