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TranslationTheInternationalAtomicEnergyAgency(IAEA)istheworld'scenterofcooperationinthenuclearfield.Itwassetupastheworld's"AtomsforPeace"organizationin1957withintheUnitedNationsfamily.TheAgencyworkswithitsmemberstatesandmultiplepartnersworldwidetopromotesafe,secureandpeacefulnucleartechnologies.AsanindependentinternationalorganizationrelatedtotheUnitedNationssystem,theIAEA'srelationshipwiththeUNisregulatedbyspecialagreement.IntermsofitsStatute,theIAEAreportsannuallytotheUNGeneralAssemblyand,whenappropriate,totheSecurityCouncilregardingnon-compliancebyStateswiththeirsafeguardsobligationsaswellasonmattersrelatingtointernationalpeaceandsecurity.TheIAEASecretariatisheadquarteredinVienna,Austria.OperationalliaisonandregionalofficesarelocatedinGeneva,Switzerland;NewYork,USA;Toronto,Canada;andTokyo,Japan.TheIAEA'smissionisguidedbytheinterestsandneedsofmemberstates,strategicplansandthevisionembodiedintheIAEAStatute.ThreemainpillarsorareasofworkunderpintheIAEA'smission:SafetyandSecurity;ScienceandTechnology;SafeguardsandVerification.

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对于一面增益为15dBd的天线,其增益折算成单位dBi时,为()dBi。

A. 13.15
B. 15.15
C. 17.15
D. 19.15

天线是一种以()形式把前端射频信号功率接收或辐射出去的设备,用来实现导行波与自由空间波能量的转化。

A. 电信号
B. 有线网络
C. 电磁波
D. 电报

天线功率的绝对值单位用W或dBm表示,功率每增加1倍,电平值增加()dBm。

A. 2
B. 3
C. 4
D. 5

RFID射频识别技术当前发展趋于（）。

A. 标准化
B. 低成本
C. 低差错率
D. 高安全性