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
2024-02-12
67
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 a 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 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 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、In 1965.
B、In 1979.
C、In 1969.
D、In 1959.
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3445650.html
相关试题推荐
[originaltext]IntheUnitedStatesmanyparentsteachtheirchildrenathom
[originaltext]IntheUnitedStatesmanyparentsteachtheirchildrenathom
[originaltext]IntheUnitedStatesmanyparentsteachtheirchildrenathom
[originaltext]Thepurposeofkeepingfitistoavoidiiihealth,resistthe
[originaltext]Thepurposeofkeepingfitistoavoidiiihealth,resistthe
[originaltext]IfyourbossasksyoutoworkinMoscowthisyear,he’dbette
[originaltext]IfyourbossasksyoutoworkinMoscowthisyear,he’dbette
[originaltext]Americannamesarewrittenandspokenwithtilegivennamefi
[originaltext]M:Sheila,you’reoneofthespeakersfortheEnglishSpeakingCo
[originaltext]M:Sheila,you’reoneofthespeakersfortheEnglishSpeakingCo
随机试题
Youshouldspendabout20minutesonQuestions1-13,whicharebasedonReading
TheGreekshaveasecondBattleofMarathonontheirhands.Theiradversaries
HelenKeller,aworld-famousauthorandpublicspeakersufferedfromastran
WhenthePortuguesebegantradingwithChinaintheearly1500s,【C1】______wa
电影院一排有6个座位,现在3人买了同一排的票,则每2人之间至少有一个空座位的不同
中国现代最早的剧本是()A.田汉的《咖啡店之一夜》 B.洪深的《赵阎王》 C
超声回弹综合法检测混凝土强度试验中,若采用钻取混凝土芯样对测区混凝土换算值进行修
在胸痛发作后6~12h,下列哪项不见升高可基本排除急性心肌梗死A.CK B.C
有关国内客运价的使用和计算,下列说法错误的是( )。 A.票价应根据旅客的
学校对校舍、体育设施、消防设施、各种仪器设备的安全状况,应当()检查一
最新回复
(
0
)