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
Some pessimistic experts feel that the automobile is bound to fall into disuse. They see a day in the not-too-distant future whe
Some pessimistic experts feel that the automobile is bound to fall into disuse. They see a day in the not-too-distant future whe
admin
2010-01-15
63
问题
Some pessimistic experts feel that the automobile is bound to fall into disuse. They see a day in the not-too-distant future when all autos will be abandoned and allowed to rust. Other authorities, however, think the auto is here to stay. They hold that the car will remain a leading means of urban travel in the foreseeable future.
The motorcar will undoubtedly change significantly over the next 30 years. It should become smaller, safer, and more economical, and should not be powered by the gasoline engine. The car of the future should be far more pollution-free than present types.
Regardless of its power source, the auto in the future will still be the main problem in urban traffic congestion. One proposed solution to this problem is the automated highway system.
When the auto enters the highway system, a retractable arm will drop from the auto and make contact with a rail, which is similar to those powering subway trains electrically. Once attached to the rail, the car will become electrically powered from the system, and control of the vehicle will pass to a central computer. The computer will then monitor all of the car’s movements.
The driver will use a telephone to dial instructions about his destination into the system. The computer will calculate the best route, and reserve space for the car all the way to the correct exit from the highway. The driver will then be free to relax and wait for the buzzer that will warn him of his coming exit. It is estimated that an automated highway will be able to handle 10,000 vehicles per hour, compared with the 1,500 to 2,000 vehicles that can be carried by a present-day highway.
In an automated highway system, all the driver needs to do is ______.
选项
A、keep in the right lane
B、wait to arrive at his destination
C、keep in constant touch with the computer center
D、inform the system of his destination by phone
答案
D
解析
根据文章最后一段第一句话"The driver will use a telephone to dial instructions about his destination into the system.”我们可以看出在"automated highway system"中,驾驶员所做的只是拨个电话,其余的就交给了计算机来处理。由此可知,D 符合题意。
转载请注明原文地址:https://kaotiyun.com/show/PEnK777K
0
专业英语四级
相关试题推荐
A、Ithelpsdevelopthegraduates’confidence.B、Itbringsapositiveeffecttojobhunters.C、Itgetsthegraduatesoffthecoac
ThingstobeTaughtinEverySchoolI.Introduction:Importanceofstudents’abilitytodealwiththerealworld.A.Speaker
A、Byteachingwritershowtoimitate.B、Byidentifyingwriter’sstrengthandweakness.C、Bydevelopingwriter’spotential.D、By
Asmoreandmorestudentsareadmittedintouniversities,campusdisciplinehasbecomeahottopic.Someuniversitiesadopta
Inatimenotsolongagoorfaraway,eatingfamilydinner,connectingwithyourspouseaftertuckingthechildrenintobedor
Predictingthefutureisariskybusinessforascientist.Itissafetosay,however,thattheglobalAIDSepidemicwillgetmu
Whenthetragicaccidenthappened,thetrainwasgoingatits___________speed.
Themanhasnotbeenableto______recently.
I’dratheryou______thoseimportantdocumentswithyou.
Thedigestiveenzymepepsinbreaksdownproteinsintocomponents______readilyabsorbedbythehumanbody.
随机试题
大规模舆论的导火线是()
频谱多普勒超声检测到零基线以上的血流频谱,表明血流是
对油脂性基质说法不正确的是
既具有健脾功效,又具有发汗、明目功效的药物是
齐某起诉宋某要求返还借款8万元,法院适用普通程序审理并向双方当事人送达出庭传票,因被告宋某不在家,宋某的妻子代其签收了传票。开庭时,被告宋某未到庭。经查,宋某已离家出走,下落不明。关于法院对本案的处理,下列哪一选项是正确的?(2009年卷三第46题)
土的相对密度是土在105~110℃下烘至恒量时的质量与同体积4℃蒸馏水质量的比值。()
甲公司是一家有限责任公司,注册资本为1亿元。截至2012年12月,公司净资产额8000万元。公司其他有关情况如下:(1)甲公司曾于2011年8月成功发行3年期公司债券1000万元,2年期公司债券500万元。(2)2013年3月10日,甲
商鞅变法中对农业生产起促进作用的措施是()。
下列有关学习动机与学习效果之间关系的描述,正确的是()。①学习难度大,学习动机水平高,学习效果好②学习难度大,学习动机水平低,学习效果好③学习任务容易,学习动机水平高,学习效果好④学习任务容易,学习动机水平低,学习效果好
(1)Daylightsavingtime(DST)istheconventionofadvancingclockssothatafternoonshavemoredaylightandmorningshaveless.
最新回复
(
0
)