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
外语
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
2010-03-03
48
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.
It can be inferred from the passage that the author ______.
选项
A、is in favor of prohibiting passengers’ use of electronic devices completely
B、has overestimated the danger of electronic devices completely
C、hasn’t formed his own opinion on this problem
D、regards it as unreasonable to exercise a total ban during flight
答案
A
解析
推理题。作者开篇指出“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.”可见作者对电磁干扰是非常关心的,对飞机上使用电子设备是非常忧虑的,因此也就不难推理出“作者赞成彻底禁止使用电子设备。”
转载请注明原文地址:https://kaotiyun.com/show/KnlK777K
本试题收录于:
大学英语三级A级题库大学英语三级分类
0
大学英语三级A级
大学英语三级
相关试题推荐
A、Thismorning.B、Thisafternoon.C、Tomorrow.D、Nextweek.C信息明示题。在对话最后,男士询问女士是否可以明天去看一下公寓,女士回答说没问题。由此可知,男士希望看公寓的时间是C项“明天”。A项“今
A—DamagereportJ—AislesignB—ExhibithallK—BoothareaC—TradefairL—BoothnumberD—
A、Repairthecopymachine.B、Dothecopyingfortheman.C、Borrowacopymachine.D、Buysomepaperonline.D细节推断题。男士询问女士复印纸在哪里,女
A、Doctorandpatient.B、Passengerandticketcollector.C、Shopassistantandcustomer.D、Bossandclerk.DW:Youwereabsentfro
A—centralprocessingunitB—disk/desktopoperatingsystemC—outputdeviceD—personal
A、9:20.B、9:30.C、9:10.D、9:50.CW:Whattimedoesthevolleyballgamestart?M:At9:30.Wehave20minutestogetthere.Q:Wh
A、Catherinewouldprobablypreferacassette.B、ShewasthinkingofgivingCatherinethesamecassette.C、Thereisnomasontog
HowdidJimreacttothedanger?Jim_____________________tooterrifiedtodoanything.
A、Returnsomebooks.B、ReadMatthew’sbooks.C、Gohome.D、Leaveclassearly.A本题为逻辑推理题。听懂对话和问话的基本内容即可确定正确答案是选项A。
Nobodycandotwothingswell______.
随机试题
二次蒸汽的再压缩的蒸发又称为热泵蒸发,它的能量利用率相当于3~5效的多效蒸发装置,其节能效果与加热室和蒸发室的温度差无关,也即和压力差无关。()
______是互联网传输信息的载体,将信息通过某种编码方案以电磁波的形式传送。
下列各函数对中,()中的两个函数是相等的。
按乳房的美学观点看,胸骨切迹到乳头的距离约为()
A、甘油B、碳酸钙C、藻酸盐D、苯甲酸盐E、十二烷基(酯)硫酸钠牙膏中常用作洁净剂的是
背景资料:某工程由四幢完全相同的砖混住宅楼组成,某建筑公司中标后,施工组织设计中考虑以每个单幢为一个施工流水段组织单位工程流水施工。经测算,各施工过程及流水节拍参数如下:(1)地下部分(2)地下部分问题:除采用的流水施工组织形式外还有哪些形
下列表述中,正确的有()。
根据邓小平同志“三个面向”的理论,当前我国教育改革中,把()作为教育改革和发展的基本出发点和归宿点。
根据《物权法》的规定,下列有关共有的表述正确的是()。
(2013江苏)2、4、0、﹣16、﹣50、()
最新回复
(
0
)