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
专升本
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
2019-01-24
53
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 past 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 device 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) 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 device 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 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.
Few airlines want to impose a total ban on their passengers using electronic devices because______.
选项
A、they don’t believe there is such a danger as radio interference
B、the harmful effect of electromagnetic interference is yet to be proved
C、most passengers refuse to take a plane which bans the use of radio and cassette players
D、they have other effective safety measures to fall back on
答案
C
解析
关键句在第二段最后一句,given that many passengers want to work during flights.很多乘客要在飞行期间工作,可以推断一些航空公司拒绝禁令的原因是:如果他们推行了禁令,也许许多需要在飞机上工作的乘客就不会选择乘坐飞机了。故选C。
转载请注明原文地址:https://kaotiyun.com/show/zAaC777K
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
Japan’s24-hourconveniencestores,alreadystrugglingwithlaggingsalesandgrowth,maysoonfaceyetanotherthreat—movesto
Unlikemodernanimalscientists,dinosaurscientistscannotsitonahillsideandusetelescopestowatchdinosaursinorderto
Unlikemodernanimalscientists,dinosaurscientistscannotsitonahillsideandusetelescopestowatchdinosaursinorderto
Thefire______twopersons’deathaswellasthedamageofallthestore’sproperty.
Enoughsleepisimportanttohealth.Theamountofsleep【C1】______dependsontheageofthepersonandtheconditionsinwhichs
Enoughsleepisimportanttohealth.Theamountofsleep【C1】______dependsontheageofthepersonandtheconditionsinwhichs
Acomputerisamachinedesignedtoperformworkmathematicallyandtostoreandselectinformationthathasbeenfedintoit.I
Acomputerisamachinedesignedtoperformworkmathematicallyandtostoreandselectinformationthathasbeenfedintoit.I
随机试题
质地疏松的全草类药材用
该病例可能诊断是合理的治疗是
多用途地籍,也被称作()。
需要进行社会评价的投资项目主要包括( )。
管道系统试验前管道上的膨胀节( ),管道已按试验要求进行加固。
【背景资料】A公司在冬季承接了一室外压缩空气管网系统的安装,系统工作压力为2.5MPa。由于工期较紧,A公司将系统中部分规格的直管分包给B公司。A公司和B公司均具备与承包管道系统相符的压力管道施工许可证,管道及管件均由业主提供。管道系
个人住房贷款的计息、结息方式,由中国人民银行统一规定。()
市场风险主要包括()风险。
有些人把别人的思想和理论拿来,当做唬人的幌子,装自己的门面,实际只是_______,并非真有所得。填入画横线部分最恰当的一项是:
AttendingaCollegeorUniversityintheUSAEachyear,manyforeignstudentswishtogotothecollegesanduniversitiesin
最新回复
(
0
)