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
2016-11-13
40
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/M0HC777K
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
Inatelephonesurveyofmorethan2,000adults,21%saidtheybelievedthesunrevolved(旋转)aroundtheearth.An【C1】______7%di
Inatelephonesurveyofmorethan2,000adults,21%saidtheybelievedthesunrevolved(旋转)aroundtheearth.An【C1】______7%di
Abeamoflightwillnotbendroundcornersunless______todosowiththehelpofareflectingdevice.
Youremainaboutthesameaswhenyoupartedwithus______you’vegotalittlethinner.
Aflyingstone______himontheheadandknockedhimout.
Bobwascompletely______bytherobber’sdisguise.
Somepeoplebelievethatinternationalsportcreatesgoodwillbetweenthenationsandthatifcountriesplaygamestogetherthey
Livingisrisky.Crossingtheroad,drivingacar,flying,swallowinganaspirintabletoreatingachickensandwichtheycana
ThatwassoseriousamatterthatIhadnochoicebut______thepolice.
Liketheold,______respectedinsomecountries.
随机试题
Socialcustomsandwaysofbehavingchange.Thingswhichwereconsideredimpolitemanyyearsagoarenowacceptable.Justafew
设f(x+y,xy)=x2+y2一xy,则=()
结合胆红素是
气雾剂的吸收主要在
水利水电工程预应力锚索施工中的锚具除必须满足静载锚固性能外,供货商应提供锚具通过()万次疲劳性能试验。
根据老年口腔健康的目标,老年人口腔内至少要保持()。
按照法律原则涉及的内容和问题的不同,可以将法律原则分为()。
1924年1月,国民党一大在广州召开,大会通过的宣言对三民主义作出了新的解释。新三民主义和旧三民主义相比,新的解释有()
A、 B、 C、 D、 B局域网通过电话交换网、有线电视网、无线城域网或无线局域网方式接入到地区级主干网的城域网,然后城域网通过路由器与光纤接入到作为国家级或区域主干网的广域网。
AccordingtotheWorldWildlifeFund,thepolarbearcouldbefacedwithextinctionandalargenumberofotheranimalsreduced
最新回复
(
0
)