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、They’re similar to a radio-controlled model aircraft B、They fly throughout the world freely just like eagles. C、They can auton
A、They’re similar to a radio-controlled model aircraft B、They fly throughout the world freely just like eagles. C、They can auton
admin
2017-12-07
66
问题
[19]Within the next few weeks a twin-engined Jetstream will take off from Warton Aerodrome in Lancashire, England, and head north towards Scotland. Like any other flight, the small commuter airliner will respond to instructions from air-traffic controllers, navigate a path and take care to avoid other aircraft. [19]But the pilot flying the aircraft will not be in the front of it: he will have his feet firmly on the ground in a control room back at Warton.
Pilotless aircraft are now widely used by the armed forces, but they fly only in restricted airspace and conflict zones. The Jetstream mission is part of a project to develop the technologies and procedures that will allow large commercial aircraft to operate routinely and safely without pilots in the same skies as manned civilian flights.
[20]To reassure those of a nervous disposition, the test flights do not carry passengers and pilots remain in the plane just in case things go wrong. In that way they are similar to Google’s trials of driverless cars, which have drivers inside them to take over if necessary while on public roads. Yet unmanned commercial aircraft are likely to enter service before people can buy autonomous cars. Modern aircraft are already perfectly capable of automatically taking off, flying to a destination and landing. These tests are trying to establish whether they can do those things safely without a pilot and at the same time comply with the rules of the air.
Progress is being made, a conference in London heard this week. It was organized by the Autonomous Systems Technology Related Airborne Evaluation and Assessment, the group staging the British test flights. This 62 million programme, backed by the British government, involves seven European aerospace companies: AOS, BAE Systems, Cassidian, Cobham, QinetiQ, Rolls-Royce and Thales.
It is potentially a huge new market. America’s aviation regulators have been asked by Congress to integrate unmanned aircraft into the air-traffic control system. [21]Some small aircraft are already used in commercial applications, such as aerial photography, but in most countries they are confined to flying within sight of their ground pilot, much like radio-controlled model aircraft. Bigger aircraft would be capable of flying farther and doing a lot more things.
[22]Pilotless aircraft could carry out many jobs at a lower cost than manned aircraft and helicopters— tasks such as traffic monitoring, border patrols, police monitoring and checking power lines. They could also operate in conditions that are dangerous for pilots, including monitoring forest fires or nuclear-power accidents.
19. What do we learn about the commuter airliner Jetstream?
20. What does the speaker say about the test flights?
21. What do we learn about the small aircrafts?
22. What advantage do the pilotless planes have?
选项
A、They’re similar to a radio-controlled model aircraft
B、They fly throughout the world freely just like eagles.
C、They can autonomously comply with the air rules.
D、They are more flexible and faster than bigger aircraft.
答案
A
解析
①从选项看,此题可能跟某种飞机的飞行情况有关。②演讲者提到一些小的无人机已经应用于商业用途,但是在大部分国家他们的飞行受控于地面飞行员,所以它们的飞行方式与无线电控制的模型飞机如出一辙。故A正确。
转载请注明原文地址:https://kaotiyun.com/show/5aU7777K
0
大学英语六级
相关试题推荐
希望工程(ProjectHope)是于1989年发起的一项公益事业,以救助贫困地区失学儿童(youngdropouts)为目的。帮助建设希望小学与资助贫困学生是希望工程实施的两大主要任务。中国仍然是一个发展中国家,贫困地区缺乏教育经费的问题依旧严峻。有超
Forthispart,youareallowed30minutestowriteashortessayentitledTheImpactofOnlineSocialNetworks.Youressayshoul
Forthispart,youareallowed30minutestowriteashortessayentitledOnUniversityEducation.Youshouldwriteatleast150
FeedingtheMassesaLoadofManureTheGreenRevolutionMyth,NormanBorlaug,andWorldHunger[A]Mostpeopledon’tkno
Mostgrowingplantscontainmuchmorewaterthanallothermaterialscombined.C.R.Barneshassuggestedthatitisaspropert
GetWhatYouPayFor?NotAlways[A]ThemostexpensiveelectioncampaigninAmericanhistoryisover.ExecutivesacrossAmer
GetEnoughSleep—orElse!Agoodnight’ssleepismoreimportanttoyourhealththanyoumayrealize.[A]MeganJoneskne
ThreeEnglishdictionariespublishedrecentlyalllayclaimtopossessinga"new"feature.TheBBCEnglishDictionarycontainsb
A、AnElgin.B、ARolex.C、ASeiko.D、ABulova.C细节题。女士想在Elgin和Rolex中选择,但是男士给予建议买Seikodigitals,最后女士接受了。
AccompanyingIndia’sindustrialtransformationhasbeenanotherrevolutionofprofoundsignificance.Aproperty-owningmiddlecl
随机试题
健脾和胃法最常用于
治疗脘腹或四肢挛急作痛,芍药宜配伍的药物是()
某建设工程,招标人决定采用公开招标的形式进行招标,资格审查的方式为资格预审。其招投标工作程序如下:(1)招标备案、确定招标方式。(2)发送投标邀请书。(3)编制、发出招标文件。(4)踏勘现场、答疑。(5)编制、发放资
从事生产、经营的纳税人的账簿、记账凭证、报表、完税凭证发票及其他有关涉税资料,除法律、行政法规另有规定外,应当保存()年。
下列案件需要减半收取诉讼费的是( )。
基金管理公司()负责公司整体风险的预防和控制,审核、监督公司风险控制制度的有效执行,可以下设合规与风险管理委员会,负责对公司经营管理与基金运作的风险控制及合法合规性进行审议、监督和检查,草拟公司风险管理战略,评估公司风险管理状况。
教育学的研究对象
香农定理的结论可以定性地表达为:带宽一定的时候,信噪比越高,(65)越高。
在数据库的3级模式结构中,当模式改变时,通过修改外模式;模式的映像而使外模式不变,从而不必修改应用程序,这是保证了数据与程序的()。
OfalltheemployedworkersintheUnitedStates,12.5millionarepartofatemporaryworkforce.TheUnitedStatesBureauofLa
最新回复
(
0
)