首页
登录
职称英语
The biggest safety threat facing airlines today may not be a terrorist with
The biggest safety threat facing airlines today may not be a terrorist with
游客
2024-07-04
38
管理
问题
The biggest safety threat facing airlines today may not be a terrorist with a gun, but the man with the portable computer in business class. In the last 15 years, pilots have reported well over 100 incidents that could have been caused by electromagnetic interference. The source of this interference remains unconfirmed, but increasingly, experts are pointing the blame at portable electronic devices, such as portable computers, radio and cassette players and mobile telephones.
RTCA, an organization which advises the aviation industry, has recommended that all airlines ban such devices from being used during "critical" stages of flight, particularly take-off and landing. Some experts have gone further, calling for a total ban during all flights. Currently, rules on using these devices are left up to individual airlines. And although some airlines prohibit passengers from using such equipment during take-off and landing, most are reluctant to enforce to total ban, given that many passengers want to work during flights.
The difficulty is predicting how electromagnetic fields might affect an aircraft’s computers. Experts know that portable devices emit radiation which affects those wavelengths which aircrafts use for navigation and communication. But, because they have not been able to reproduce these effects in a laboratory, they have no way of knowing whether the interference might be dangerous or not.
The fact that aircrafts may be vulnerable to interference raises the risk that terrorists may use radio systems in order to damage navigation equipment. As worrying, though, is the passenger who can’t hear the instructions to turn off his radio because the music’s too loud. [br] Few airlines want to impose a total ban on their passengers using electronic devices because
选项
A、they don’t believe there is such a danger as radio interference
B、the harmful effect of electromagnetic interference is yet to be proved
C、most passengers refuse to take a plane which bans the use of radio and cassette players
D、they have other effective safety measures to fall back on
答案
B
解析
推理题。文章第三段指出“because they (the experts)have not been able to reproduce these effects in s laboratory,they have no way of knowing whether the interference might be dangerous or not.”,因此航空公司对禁止在飞机上使用电子设备表现出犹豫不决,由此可以推断出航空公司没有彻底禁止机上乘客使用电子设备的原因是电磁干扰的破坏性影响尚未得到证实
转载请注明原文地址:https://tihaiku.com/zcyy/3662540.html
相关试题推荐
WhenevertravelingonShanghaiAirlines(SAL)flightswithpaidtickets,you
Latelyyou’vebeenheatingalotofautocompaniestalkingaboutsafety.Andat
Apartfromdeathsfromillnesses,oneofthebiggestthreatstoone’slifeinhi
Carsof2000willtravelthenation’shighwaysinnever-before-dreamed-ofsafety
The20thChinaCarpetFairwillbethebiggestofitskindinscale.Specialized
AttheinternationalterminalforNorthwestAirlinesatJohnF.KennedyInternati
Latelyyou’vebeenheatingalotofautocompaniestalkingaboutsafety.AndatF
Thougheventhesebuildingsareoccasionallythreatened,theirreputationdoesp
Latelyyou’vebeenhearingalotofautocompaniestalkingaboutsafety.Andat
Inthemeantime,thequestionfacingbusinessiswhethersuchresearchis______
随机试题
Fourteen-year-oldSeanMeCallumlayinahospitalbedwaitingforanewhear
______thefirstsentence,theeditorrefusedtopublishthearticle.A、ReadingB、
[audioFiles]2021m5x/audio_ve01005j_ezflisteningxa_0123_202105[/audioFiles]
[originaltext]Thecollegehadaverygoodfootballteam,anditsbestplaye
Lackofculture,orratheranexcessofthewrongsortofculture,isof
根据《消防给水及消火栓系统技术规范》,以下关于消防水泵房的说法中不正确的是(
1千焦(kJ)等于( )。A.2390kcal B.239kcal C.2
妇女依法享有的婚姻家庭权利不包括()。A.婚姻自主权 B.生育权 C.子女监
(2018年真题)期货交易所履行职责引起的商事案件是指()。A.期货交易所会员
规范性法律文件系统化是法律完备阶段的重要工作,其方法主要包括()A.立法规
最新回复
(
0
)