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
22
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 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.
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 electromagnetic interference
C、hasn’ t formed his own opinion on this problem
D、regards it as unreasonable to exercise a total ban during flight
答案
C
解析
作者没有很明确的态度,只是做客观的说明,描写了很多情况,但没有表明自己的立场和看法。A赞成禁令;B高估危险;C没有形成自己的观点;D认为禁令无理。
转载请注明原文地址:https://kaotiyun.com/show/nAaC777K
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
WhentheOldandNewCitiesofJerusalemwerereunitedin1967,arecentlywidowedArabwoman,whohadbeenlivinginOldJerusa
Hawaii,theyoungeststateoftheUnitedStates,isdifferentinmanywaysfromthemainlandstates.TheHawaiianpeopleaream
Hawaii,theyoungeststateoftheUnitedStates,isdifferentinmanywaysfromthemainlandstates.TheHawaiianpeopleaream
Hawaii,theyoungeststateoftheUnitedStates,isdifferentinmanywaysfromthemainlandstates.TheHawaiianpeopleaream
Almosteveryfamilybuysatleastonecopyofanewspapereveryday.Somepeoplesubscribetoasmanyastwoorthreedifferent
Thestrangecloseunderstandingbetweentwinsisafamiliarenoughphenomenon.Oftentheyseemtounderstandeachotherandshar
Enoughsleepisimportanttohealth.Theamountofsleep【C1】______dependsontheageofthepersonandtheconditionsinwhichs
ResearchershavefoundthatREM(rapideyemovement)sleepisimportanttohumanbeings.Thistypeofsleepgenerallyoccursfour
Peopleareusedtospeakingtheirnativelanguage,soimmigrantsarehavingmanyproblemsbetweenthefirstgenerationandthes
ResearchershavefoundthatREM(rapideyemovement)sleepisimportanttohumanbeings.Thistypeofsleepgenerallyoccursfour
随机试题
(2009年年4月)1945年10月10日,国共双方签署了________。
房产税的征税对象和征收范围。
求曲面z=2x2+3y2在点处的切平面方程.
急性心肌梗塞时心律失常大多发生于梗死后()
"诸风掉眩皆属于肝"语出何处:"上气不足"语出何处:
患者于某,女性,58岁。2年前曾患“中风”,经治已愈,之后逐渐出现善忘呆滞,言语模糊不清,行为古怪孤僻,时哭时笑,诊见两目黯晦,舌黯,脉细涩。若病人日久兼气血不足应
出租房屋的正常维修义务应由()承担。
在路由表中,特定主机路由表项的子网掩码为_________。
WriteonANSWERSHEETONEacompositionofabout150wordsonthefollowingtopic:EnvironmentalPr
CreatingaHarmoniousFamilyForthispart,youareallowed30minutestowriteashortessayentitledCreatingaHarmonious
最新回复
(
0
)