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
2023-11-21
29
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 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 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 aircraft 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] The passage is mainly about ______.
选项
A、a new regulation for all airlines
B、the defects of electronic devices
C、a possible cause of aircraft crashes
D、effective safety measures for air flight
答案
C
解析
本题询问文章的主要内容是什么。文章首先说明对航空公司最大的威胁来自电磁干扰。接着,文章介绍了专家的建议:尤其在飞机起降期间禁止使用这些电子设备。不同的航空公司也采取了不同的对策。最后,文章指出由于飞机易受到电磁的干扰,这一点也可能被恐怖分子所利用,也可能被粗心的乘客忽视。由此可见,C “一种飞机可能坠毁的原因”是正确答案。根据第二段最后一句中的"although some airlines prohibit passengers from using such equipment during take
转载请注明原文地址:https://tihaiku.com/zcyy/3206691.html
相关试题推荐
Thebiggestdangerfacingtheglobalairlineindustryisnottheeffectsof
WhathappenedthisFriday?[br][originaltext]AnAmericanAirlinesDC-10j
WhathappenedthisFriday?[br][originaltext]AnAmericanAirlinesDC-10j
WhathappenedthisFriday?[originaltext]AnAmericanAirlinesDC-10jetline
Whatdoesthemanwanttodo?[originaltext]W:FrontierAirlines.HowmayIhelp
ThethreebiggestliesinAmericaare:(1)"Thecheckisinthemail."(2)
ThethreebiggestliesinAmericaare:(1)"Thecheckisinthemail."(2)
Thebiggestsafetythreatfacingairlinestodaymaynotbeaterroristwith
Thebiggestsafetythreatfacingairlinestodaymaynotbeaterroristwith
Thebiggestsafetythreatfacingairlinestodaymaynotbeaterroristwith
随机试题
Lucy:So______Evan;Well,sheexaminedme.Sheputathermometerinmymouthan
Whatisusuallyavoidedinconversationwithanewfriend?Privateor______thi
Childrenwholivenearamainroadareingreaterdangerofcatchingpneumon
Oceanographyhasbeendefinedas"Theapplicationofallsciencestothestu
A公司是从事粮仓自动通风系统开发和集成的企业,公司内的项目管理部作为研发与外部的
A
下列关于期货交易制度的论述中,错误的是()。A.任何期货交易者必须按其买入或
北京市生态与环境价值中,2019年下列贴现值指标最大的是:A.气候调节价
下列情形的建筑市场各方主体,除()以外都将被列入建筑市场主体“黑名单”。A.经法
某施工单位拟租赁一家设备公司的塔吊,依照《建设工程安全生产管理条例》,设备公司应
最新回复
(
0
)