首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
The biggest safety threat facing airlines today may not be a terrorist with a gun, but the man with the portable computer in bus
The biggest safety threat facing airlines today may not be a terrorist with a gun, but the man with the portable computer in bus
admin
2011-01-17
34
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 (航空) industry, has recommended that all airlines ban (禁止) 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 (易受损的) to interference raises the risk that terrorists may use radio system 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.
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
该文主要讨论发生空难的原因。
转载请注明原文地址:https://kaotiyun.com/show/quYi777K
本试题收录于:
GCT工程硕士(英语)题库专业硕士分类
0
GCT工程硕士(英语)
专业硕士
相关试题推荐
西周时期的“五听”不包括()。
Doctor:Whatseemstobetheproblem?Patient:______
Tom:Howlonghaveyouworkedinthisdepartment?John:______.
Thecaptainoftheship______thepassengersthattherewasnodanger.
Thegrowthofpopulationduringthepastfewcenturiesisnoproofthatpopulationwillcontinuetogrowstraightupwardtoward
Advertisingcanpersuadetheconsumertobuyworthlessproductsby______.Itcanbeinferredfromthepassagethatasmartcon
Elephantswhopaintaren’tnew.PaintingsbyRuby,anAsianelephantwholivedatthePhoenixZooinArizona,soldforupto$5,
Airportclerk:Windoworisleseat?Traveler:______Airportclerk:Boardinggate2at11:0Thankyou.
Mygrandmother______rurallife.
随机试题
下列说法中,不正确的是()。
三维超声对心脏血流动力学描述,正确的是
土由以下三部分组成()、()和()。
油毡瓦是以哪种材料为胎基制成的防水片材?
关于人类活动的空间分布及其空间中的相互关系的学说是()。
某单位违反《会计法》的规定,任用不具有会计从业资格的余某担任本单位会计机构负责人。县级以上财政部门可以对该违法行为直接负责的主管人员和其他直接责任人员处()。
未经其他合伙人一致同意,合伙人以其在普通合伙企业中的财产份额出质,其法律后果是()。
李明从图书馆借来一批图书,他先给了甲5本和剩下的,然后给了乙4本和剩下的,又给了丙3本和剩下的,又给了丁2本和剩下的,最后自己还剩2本。李明共借了多少本书?
竞争:共赢
Flexibilityisanessentialcomponentofgoodcooking.Youshouldneverfeellockedintoarecipeoramenuunlessitinvolvesa
最新回复
(
0
)