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 are only in restricted use by army. B、They carry passengers but no pilots. C、They drive automatically with pilots in them
A、They are only in restricted use by army. B、They carry passengers but no pilots. C、They drive automatically with pilots in them
admin
2016-12-18
26
问题
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. 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.
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 driver-less 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. 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.
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 are only in restricted use by army.
B、They carry passengers but no pilots.
C、They drive automatically with pilots in them.
D、They themselves can handle anything wrong.
答案
C
解析
演讲者提到为了保证用于测试的商用无人机能应对紧急情况,飞行员仍旧留在飞机上。故C“虽有飞行员在机上,但测试机自动飞行”正确。
转载请注明原文地址:https://kaotiyun.com/show/8xF7777K
0
大学英语六级
相关试题推荐
I’vetwicebeentocollege-admissionswars,andasIsurveythebattlefield,somethingdifferentishappening.It’sone-upmanshi
IfJohnnycan’twrite,oneofthereasonsmaybeaconditioningbasedonspeedratherthanrespectforthecreativeprocess.Spe
Whenstudyinghumantalent,thetemptationisusuallytoconcentrateontheupperreaches.Understandablyso:wealladmirethe
WhenwestartedtheMeyerhoffScholarsProgramnearly20yearsago,wefacedamajorchallenge—helpingstudentsofcolorachieve
WhenwestartedtheMeyerhoffScholarsProgramnearly20yearsago,wefacedamajorchallenge—helpingstudentsofcolorachieve
Ausefuldefinitionofanairpollutantisacompoundaddeddirectlyorindirectlybyhumanstotheatmosphereinsuchquantitie
A、Theconsiderableamountofmoneyspentonit.B、Themajorityoftimespentonandaroundit.C、Theunavoidableareaittakesi
A、Motherisimportantforchildrenaswellasteachers.B、Stayingwithmotherisbetterthanattendingadaycarecenter.C、Ther
A、Powerplantsburncoal.B、Factoriespoursewage.C、Peopleburytrashunderground.D、Citypopulationincreasesgreatly.A
Lastyearatairportsacrosstheworld,18%offlightsweredelayed,leavingmillionsofpassengersstuckwithalotoftimeon
随机试题
病毒性肝炎合并妊娠的处理哪些项不正确:
刺激交感神经对胃肠道的影响是
孕1产0,足月临产14h,宫口开7cm,产程进展缓慢,胎心140~150次/分钟,胎头矢状缝与坐骨棘间径一致,枕骨在母体右侧,S-2。其诊断是下列哪项
采取私募方式发行,不需要使用严格的招股说明书,只需使用信息备忘录,原因是私募的对象一般是( )。
根据出租汽车客运的特点,各级运管机构应做到()。
我国会计法规定,应当办理会计手续进行会计核算的经济业务事项主要有()。
探戈是流行于拉丁美洲的一种舞蹈节奏,其节拍采用________。
在平面直角坐标系xOy内,曲线y=x3-3x2+1在点(1,-1)外的切线方程为________。
古罗马共和时期,以《十二铜表法》为教育内容的学校是()
Oneofthemostalarmingthingsaboutthecrisisintheglobalfinancialsystemisthatthewarningsignshavebeenouttherefo
最新回复
(
0
)