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 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
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
admin
2009-09-12
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 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. 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. 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
[听力原文]
If no signal is sent from the command spot, what will happen to the train?
[听前预测] 根据选项中的stop,move,slow down,keep a safe distance等词可推断本题询问火车运行过程中的有关问题。
[答案详解] 事实细节题[考频:63]。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://kaotiyun.com/show/0l37777K
0
大学英语四级
相关试题推荐
A、Diplomasarelessimportantthanexperience.B、Collegecoursesarenotallnecessary.C、Youshouldfocusondoingwhatyoulik
Scientistshavebegunusingsatellite-basedsystemstopredictvolcaniceruptions.Thisallowsblanketcoverageoftheentirewo
A、Heseeshissisterveryseldom.B、HesentMarksomethingonhis19thbirthday.C、Healwayswalkedtowork.D、Heliveswithhis
Diseasecanbeoneofthemostpowerfulfactorsincheckingpopulationgrowth.Incrowdedconditionswheremanyindividualsofa
A、Itwasfreeofchargeonweekends.B、Ithada15%discountonweekdays.C、Itwasofferedtofrequentguestsonly.D、Itwas10%
A、Adruggist’ssuggestion.B、Anarticle.C、Anadvertisement.D、Asalesclerk’scomment.BWhatstartedtheconversation?
A、Thegreatnumberofpeopleengagedincigaretteproducing.B、Therapiddevelopmentofcigarette-makingmachine.C、Therapidde
A、Aspeedlimit.B、Aspeed-cheek.C、Adistancemeasurement.D、Atraffic-sign.BWhatdoes"aspeedtrap"meaninthepassage?
__________(只有通过实践你才)beabletoimproveyourspokenEnglishandgraduallyspeakfluently.
A、Themanislearninghowtouseacomputer.B、Thewomanisshowingthemanhowtoputpagenumbersonadocument.C、Themanis
随机试题
叶片泵的转子厚度应小于定子厚度()。
企业生产甲产品,上年该产品单位成本为每件400元;本年实际总成本2160000元,实际产量5000件。则本年可比产品成本降低额为160000元。()
患者,女,26岁。平素急躁,1周来自觉胁腹胀满,小便不畅,尿量减少,舌红苔薄黄,脉弦,下列处方中最佳的为
混凝土路面施工过程中,如果试件的试验结果表明28天混凝土强度达不到规定强度时,监理工程师就可认为承包人该段混凝土施工质量不合格。( )
(2006)按《综合医院建筑设计规范》的规定:x线治疗室的防护门和“迷路”的净宽应分别不小于()。
下列单位中,不属于企业所得税纳税人的是()。
现代企业部门划分方法中,()是指按照地理范围来划分管理部门。
需胆盐激活的消化酶是________和________。
中国共产党建立新型人民军队的重要开端是()。
AIntroductiontoSingaporeBEducationCEconomyDStateSystemofSingaporeEHistoryofSingaporeFLandandClimate
最新回复
(
0
)