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
27
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.
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/KNaC777K
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
Enoughsleepisimportanttohealth.Theamountofsleep【C1】______dependsontheageofthepersonandtheconditionsinwhichs
Enoughsleepisimportanttohealth.Theamountofsleep【C1】______dependsontheageofthepersonandtheconditionsinwhichs
Enoughsleepisimportanttohealth.Theamountofsleep【C1】______dependsontheageofthepersonandtheconditionsinwhichs
Enoughsleepisimportanttohealth.Theamountofsleep【C1】______dependsontheageofthepersonandtheconditionsinwhichs
Acomputerisamachinedesignedtoperformworkmathematicallyandtostoreandselectinformationthathasbeenfedintoit.I
CliffordStollranacomputersysteminBerkeley,California.Asasystemadministrator,hekeptacloseeyeontherecords.On
随机试题
机关文书部门收到下级机关上报的需要办理的公文,应当进行()
下列选项中不影响管理道德的因素是()
按照网络的拓扑结构来划分,计算机网络分为总线型网络、星型网络、()、树状网络和混合型网络等。
男性,60岁,嗜烟。平时经常轻微咳嗽,因溃疡病大出血行急性胃大部切除术,术后痰多而稀,但无力咳出。术后1天逐渐出现烦躁不安,呼吸急促。检查:体温37.8℃,脉率95次/分,呼吸31次/分,血压正常,无发绀,心脏无特殊,右肺下部呈实音,呼吸音消失;血白细胞1
加湿器作为福利发放员工,成本2万,市场不含税价5万,会计处理正确的是()。
企业编制的财务情况说明书至少应对下列情况作出说明( )。
在合同中,当事人为解决争议而规定的条款是指()。
设有向量组α1=(1,-1,2,4)T,α2=(0,5,1,2)T,α3=(3,0,7,4)T,α4=(1,-2,2,0)T,αs=(2,1,5,10)T,则该向量组的极大无关组为()
对生命没有寄托的人,青年时代和“儿时”对他格外宝贵。这种罗曼蒂克的回忆其实并不是发现了“儿时”的真正了不得,而是感觉到“中年”以后的衰退。本来,生命只有一次,对于谁都是宝贵的。但是,假使他的生命溶化在大众里面,假使他天天在为这世界干些什么,那么,他总在生长
TheHappinessEffect[A]Thenexttimeyougettheflu,therewillalmostcertainlybesomeoneyoucanblameforyourpain.There
最新回复
(
0
)