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 to drive it when necessary. C、To take care of t
A、To drive the train after it is started automatically. B、To start the train and to drive it when necessary. C、To take care of t
admin
2010-08-21
46
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.
选项
A、To drive the train after it is started automatically.
B、To start the train and to drive it when necessary.
C、To take care of the passengers on the train.
D、To send commanding signals to the command spot.
答案
B
解析
选项均以to+do的形式开头,表明本题考查做某事的目的或行为活动。问题询问的是工人在Victoria铁路线上的任务是什么。文中提到在维多利亚线运营的火车上,工人只需启动火车,或在必要时进行驾驶,B项正确。
转载请注明原文地址:https://kaotiyun.com/show/3g7K777K
0
大学英语六级
相关试题推荐
A、InMexico.B、InCalifornia.C、Inthecity.D、InNewMexico.B推理判断题。对话中提到3个地点,还有3个时间线索,所以解题的关键是记录下相关的时间和地点。女士详细说明了Dr.Smith的行程。他
SlashYourBills--6WaystoKeepMoreCashLikealotofhardworkingcouples,IlahandDennisHardestyofLongBeach,Calif
SlashYourBills--6WaystoKeepMoreCashLikealotofhardworkingcouples,IlahandDennisHardestyofLongBeach,Calif
Largeanimalsthatinhabitthedeserthaveevolvedanumberofadaptationsforreducingtheeffectsofextremeheat.Oneadaptat
A、Itwastoosmall.B、Itwastooloose.C、Itwastooexpensive.D、Shedoesn’tlikethestyle.D男士说“你穿这件衣服很好看。可能腰那里稍微有点紧。你想试大一号的吗
Untilabout30yearsago,languageresearchersfocusedtheirstudiesoninfantswhohadalreadybeguntobabble,accordingtoJu
A、Ithelpstheharmonybetweenhumanbodyandeatinghabits.B、Itistoloseextraweight,especiallyforthemiddleaged.C、It
Althoughthefactthattodayvirusesareknownto【S1】______causecancerinanimalsandincertainplants,tha
A、Movehisplantsawayfromthewindow.B、Watertheplantsmoreoften.C、Lettheplantshavemoresunlight.D、Lethertakecare
Teachersbelievethatstudents’responsibilitywithlearningisnecessary.【S1】______.Ifalongreadingassignmentisgiv
随机试题
关于业主大会、业主委员会的决定,以下说法正确的是:()
闭式胸膜腔引流,更换引流瓶之前要
下列哪项不属于十二指肠的正常解剖部分
A.<1Oml/kgB.30~50ml/kgC.50一lOOml/kgD.100~120ml/kgE.120~150ml/kg中度脱水累计损失量()。
应急照明、道路照明、警卫照明及电压为12~24V的照明灯的端电压,一般不宜低于其额定电压的()。
下列关于我国银行业营销人员分类正确的是()。
在融资租赁合同中,承租人占有租赁物期间,租赁物造成第三人的人身伤害或者财产损害的,由出租人对第三人承担赔偿责任。()
薪酬的非货币形式不包括()。
对CD-ROM可以进行的操作是
Mywalletisnowheretobefound.I______whenIwasonthebus.
最新回复
(
0
)