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
专升本
When a man is driving a car for long distances along a main road or motorway, two of his problems are to keep the car at a fairl
When a man is driving a car for long distances along a main road or motorway, two of his problems are to keep the car at a fairl
admin
2014-05-25
57
问题
When a man is driving a car for long distances along a main road or motorway, two of his problems are to keep the car at a fairly steady speed and to make sure that he does not run into the car in front of him. Easy enough you may think—but it is even easier on a long motorway drive for a man’s attention to wander. Some experiments have been made with a system which involves computer control of these two problems. The car’s computer keeps the speed steady. At the same time the distance between the car and another car in front of it is rear reflectors(后反射镜)of the car in front and is reflected back, so enabling the distance to be measured. This information is fed to the computer, which adjusts its speed control accordingly.
There are also to be experiments with a system called "Minigap". This system will he particularly useful to driver stuck in long queues of cars, as the computer would control not only the speed and the distance from the car in front, but also the steering(方向盘操纵). Using this system, a driver could switch over to Minigap, take out his newspaper and do the crossword puzzle while car drives most of the way home automatically. To the roadside observer, the line of cars would seem like a train which carriages could join or leave at will (任意).
What is the main subject of the passage?
选项
A、Speed control.
B、The system "Minigap".
C、The computer and the motorcar.
D、Two of driver’s problems.
答案
C
解析
全文所谈论的是在汽车上安装自动控制装置。D在文中引出主题,A、B分别是两种控制类型,故应选C。
转载请注明原文地址:https://kaotiyun.com/show/J2UC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
Televisionhasnowcometonearlyeveryfamily.Ithasbecomeaveryimportantpartinpeople’slife.SchoolchildrenintheUS
InonlytwodecadesAsianAmericanshavebecomethefastestgrowingUSminority.Astheirchildrenbeganmovingupthroughthen
Thereisnodoubtaboutthe______ofthemedicine,onlyit’salittletoocosdy.
ReligiousandprivateschoolsreceivelittlesupportfrompublictaxesintheUnitedStates,and【C1】______aresult,areusually
Television,itisoftensaid,keepsone【C1】______aboutcurrentevents,allowsonetofollowthe【C2】______developmentinscience
Forsomeemployers,thepolicyoflifelongemploymentisparticularlyimportantbecauseitmeansthattheycanputmoneyandeff
Shedecidedtotakeasecondcoursesinceshe______thefirstone.
Thepriceoffruithasincreasedrecently______thepriceofvegetableshasgonedown.
Ifyoutravelaroundtheworld,youwillbesurprisedtofindthatforeigncustomscanbedifferent【C1】______yourown.Avisitor
Ifyoutravelaroundtheworld,youwillbesurprisedtofindthatforeigncustomscanbedifferent【C1】______yourown.Avisitor
随机试题
蔡元培主张教育独立思想,内容为教育()独立、教育()独立、教育()和内容独立;教育脱离()而独立。
临床随机对照试验中的“双盲法”是指
氯霉素临床应用不常用的原因是
A投标人在编制投标文件时的主要依据是否妥当?D投标人的投标文件作废标处理是否正确?
一对孔和轴,图纸上规定孔的尺寸为φ25+0.0210,轴的尺寸为φ25-0.007-0.020。问题:生产合格的孔、轴在装配中是如何配合并求出其极限。
游客的行李在来华航空途中丢失,导游人员应该()。
简历的筛选应涉及下列哪几个方面?()
采用两难故事法对儿童道德判断发展水平进行研究的是()。
下列选项中,符合所给图形的变化规律的是______。
某网络的拓扑结构如图5-16所示,网络A中A2主机的IP地址可以为(40)。如果网络B中有1000台主机,那么需要为网络B分配(41)个C类网络地址,其中B1主机的IP地址可以为(42),网络B的子网掩码应为(43)。
最新回复
(
0
)