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
2024-10-01
12
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 ail flights. Currently, rules on using these devices are left up to individual airiness. And although some airlines prohibit passengers from using such equipment during take-off and landing, most are reluctant to enforce a 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 aircraft’ s 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 radio systems.
B、They may have taken place during take-off and landing.
C、They were proved to have been caused by the passengers? portable computers.
D、They were suspected to have resulted from electromagnetic interference.
答案
D
解析
细节题。就“在过去15年中的100多次飞行事故”,作者在第一段指出:“In the last l5 years ...electromagnetic interference.”,由此可见A错误,而D为正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3782793.html
相关试题推荐
TowhichcountrydotheRodong1missilesbringthemostthreat?[originaltext]
WhatisthedifficultynowJapanesemanufacturersarefacingwith?[originaltext
Thebiggestsafetythreatfacingairlinestodaymaynotbeaterroristwith
Thebiggestsafetythreatfacingairlinestodaymaynotbeaterroristwith
WhatisthebiggestchallengeinbirdflucontrolinIndonesia?[originaltext]
WhathashappenedinGaza?[originaltext]Gazaisfacingitsworsthumanitari
HowmuchdoestheWorldBanksupposetospendinfacingtheagriculturalchallen
HowmuchdoestheWorldBanksupposetospendinfacingtheagriculturalchallen
Hearrivedtocarryoutahealthandsafety______ofthebuilding.A、inspirationB
Thechocolatebarmanufactureratthecentreofanextortionthreatsaysthe
随机试题
[originaltext]M:Mm...Ithinkweseeeyetoeyethere.Howaboutthoselanguag
Thewater______coolwhenIjumpedintothepoolformorningexercise.A、wasfelt
UnderstandingTypesofPoemsⅠ.Epic
关于谐波分析,下列说法正确的是()。A.一个非正弦周期波可分解为无限多项谐波成
假设某树有n个结点,则其中连接结点的分支数目为( )。A.n-1 B.n
急性胆囊炎的常见症状不包括A.右上腹痛 B.右肩背痛 C.脐周痛 D.畏寒
用FITC标记抗体间接法测ANA属于( )。A.沉淀反应 B.凝集反应 C
简述现代企业人力资源管理各个历史发展阶段的特点。
脾与肾的关系表现在A.先后天互资 B.燥湿相济 C.水液代谢 D.上下相应
建设单位选择工程合同类型应综合考虑的因素是()A.工程项目复杂程度 B.建
最新回复
(
0
)