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
16
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] The passage is mainly about ______.
选项
A、the defects of electronic devices
B、a new regulation for all airlines
C、effective safety measures for air flight
D、a possible cause of aircraft crashes
答案
D
解析
主旨题。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。
转载请注明原文地址:https://tihaiku.com/zcyy/3046276.html
相关试题推荐
SafetyPrecautions(预防措施)ofTVMonitor(1)
Oncethereisathreattoourwatersupplywatercanquicklybecometheonlytha
Latelyyou’vebeenheatingalotofautocompaniestalkingaboutsafety.Andat
The20thChinaCarpetFairwillbethebiggestofitskindinscale.Specialized
Whatissomepeople’sexcusefornotwearingsafetybelts?Theysaytheyare____
Latelyyou’vebeenheatingalotofautocompaniestalkingaboutsafety.AndatF
Therapidlyexpandingnumberofautomobilesthreatensafurtherescalationinth
It’sgenerallyagreedthatthegreatestthreatfacingtheworldtodayisthe
Latelyyou’vebeenhearingalotofautocompaniestalkingaboutsafety.Andat
Inthemeantime,thequestionfacingbusinessiswhethersuchresearchis______
随机试题
Wehumanbeingsarelandanimals,butwearealsocloselytiedtothesea.T
消防车、消防艇前往执行火灾扑救或者应急救援任务过程中下列叙述不正确的是()。A
下面的UML类图描绘的是(请作答此空)设计模式。关于该设计模式的叙述中,错误的是
“给我一打健康的婴儿,一个由我支配的特殊环境,让我在这个环境里养育他们,……我可
下列属于新课程标准确定的“造型?表现”学习领域的学习目标是()。A.感受各种材
2019年我国农民工规模继续扩大,总量达到29077万人,同比增长0.8%。其中
外汇管制是指一国政府为平衡国际收支和维持本国货币汇率而对外汇进出实行的限制性措施
在编制历史文化名城保护规划时,按照相关要求,也可以根据实际需要,在历史文化街区的
关于现浇预应力混凝土连续梁施工的说法,错误的是()。A.高度超过8m、跨度超
关于给排水管道施工质量控制,说法正确的是()。A、各分项工程应按照施工技术标准
最新回复
(
0
)