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
2023-09-26
40
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] What is said about the over 100 aircraft incidents in the past 15 years?
选项
A、They may have been caused by the damage to the radio system.
B、They may have taken place during take-off and landing.
C、They were proved to have been caused by the passenger’s portable computers.
D、They were suspected to have resulted from electromagnetic interference.
答案
D
解析
细节题。“在过去15年中的100多次飞行事故的可能的原因是什么”,作者在第一段指出;“In the last 15 years,pilots have reported well over 100 incidents that could have been caused by electromagnetic interference.”所以D为正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3046277.html
相关试题推荐
SafetyPrecautions(预防措施)ofTVMonitor(1)
Oncethereisathreattoourwatersupplywatercanquicklybecometheonlytha
Apartfromdeathsfromillnesses,oneofthebiggestthreatstoone’slifeinhi
The20thChinaCarpetFairwillbethebiggestofitskindinscale.Specialized
AttheinternationalterminalforNorthwestAirlinesatJohnF.KennedyInternati
AttheinternationalterminalforNorthwestAirlinesatJohnF.KennedyInternati
Therapidlyexpandingnumberofautomobilesthreatensafurtherescalationinth
Thougheventhesebuildingsareoccasionallythreatened,theirreputationdoesp
Theleadersmettodiscusstheproblemsfacingtheir______countries.A、respecti
Because[originaltext]ForwhatreasondoestheVenicefaceathreattoitsvery
随机试题
Therearepeoplewhoareespeciallyattractedtothenotionof"climbingthe
中国人的境外奢侈品消费(overseasluxuryconsumptionofChinese)指的是越来越多富裕的中国人到境外购买奢侈品的现象。
摄食的生理调节机制有哪些?
根据《证券投资顾问业务暂行规定》,证券公司、证券投资咨询机构从事证券投资顾问业务
细小的火山灰中含有二氧化硅,这种化合物的熔点是1100摄氏度。而目前大部分飞机的
某开发商于2013年6月1日获得开发项目用地的土地使用权,2014年4月1日完成
客户申请开展融资融券业务时,向证券公司营业部提交的相关材料包括()A:融资融券担
资产负债率用于揭示企业的()。A:短期偿债能力B:长期偿债能力C:长期获利能
甲为某有限公司股东,持有该公司15%的表决权股。甲与公司的另外两个股东长期意见不
(2019年真题)根据国家指令无偿提供用于公益事业的铁路运输服务应征收增值税。(
最新回复
(
0
)