首页
登录
职称英语
[originaltext] The biggest safety threat facing airlines today may not be a te
[originaltext] The biggest safety threat facing airlines today may not be a te
游客
2023-07-14
117
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.
Radio Technical Commission for Aeronautics, or RTCA, an organization which advises the aviation industry, has recommended that all airlines ban such devices from being used during "critical" stages of a flight, particularly takeoff 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 takeoff 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.
选项
A、Portable computers.
B、Radio.
C、Mobile telephones.
D、The source remains unconfirmed.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2837302.html
相关试题推荐
[originaltext]ProfessionalsportsareverypopularintheUnitedStates,and
[originaltext]ProfessionalsportsareverypopularintheUnitedStates,and
[originaltext]Whydosomanypeoplelivetoahealthyoldageincertainpa
[originaltext]Whydosomanypeoplelivetoahealthyoldageincertainpa
[originaltext]Whydosomanypeoplelivetoahealthyoldageincertainpa
[originaltext]M:HiDiana,mindifIsitdown?W:Notatall,Jerry.Howhavey
[originaltext]M:HiDiana,mindifIsitdown?W:Notatall,Jerry.Howhavey
[originaltext]Advertisingismadeupofthetechniquesandpracticesusedt
[originaltext]Advertisingismadeupofthetechniquesandpracticesusedt
[originaltext]M:Shawn’sbeentryingformonthstofindajob.ButIwonderhow
随机试题
NoteventhecombinedpowersofSpiderman,IronMan,theIncredibleHulk,Ca
Moreoftenthannot,itisdifficultto______theexactmeaningofaChineseidi
Theworldisrunningoutofoil,andenergyexpertsbelievethatthere
在注册会计师拟实施的以下审计程序中,有助于其证实X公司固定资产存在认定的有()。
膀胱癌好发于:A.三角区 B.膀胱底 C.膀胱顶 D.膀胱后壁 E.膀胱
依据权利/利益方格,对单位内部生产核心部件应采取的干系人管理策略是()。A
证券市场供给的决定因素有( ) Ⅰ.上市公司质量 Ⅱ.上市公司数量 Ⅲ.
某可转换债券面值1000元,转换比例为40,实施转换时标的股票的市场价格为每股2
保证团队成员能根据团队的目标要求来规范个人的行动,指的是团队规则中的()。
依照《建设工程质量管理条例》相关规定,监理单位的下列行为中,将被处以责令改正,处
最新回复
(
0
)