单项选择题 根据《QB－J－003－2012室分分布系统设计规范》覆盖区域呈带状分布，且覆盖距离有限，一般仅应用于地铁及隧道等狭长且有弯道的通道型室内区域的电缆是()。

单项选择题 AP与交换机采用五类线／超五类线连接时，交换机与AP之间的距离应满足五类线的()米传输距离限制.

单项选择题 YouaredoinganenvironmentassessmentforaclientthathasinvestedinOracleRACforfaulttolerance，loadbalancing，andscalability.TheclientalsoinvestedinclusteredOracleWebLogicServer.Younoticethatthisclient’senvironmentisnotintegratedforactive-activehighavailabilitydeploymentofapplications.Whatwillbeyourrecommendationtoachievethat？（）A.MetaLinktoRACB.ClusterLinktoRACC.TopLinktoRACD.GridLinktoRAC

单项选择题 ViewthefollowingSQLstatements：TransactionT1INSERTINTOhr.regionsVALUES（5，’Pole’）；COMMIT；TransactionT2UPDATEhr.regionsSETregion_name=’Poles’WHEREregion_id=5；COMMIT；TransactionT3UPDATEhr.regionsSETregion_name=’NorthandSouthPoles’WHEREregion_id=5；YouwanttobackouttransactionT2.Whichoptionwouldyouuse？（）A.Itispossible，buttransactionT3alsobacksout.B.ItispossiblewiththeNOCASCADE_FORCEoption.C.ItispossiblewiththeNONCONFLICT_ONLYoption.D.ItisnotpossiblebecauseithasconflictswithtransactionT3.

单项选择题 YouarecreatinganewformfortheOrderEntryapplication.Youdefinearecordgroupthatwillbecreatedwhentheformisexecutingthisbuiltin:CREATE_GROUP(rg_emplist,global_scope)Whichform(s)intheapplicationwillhaveaccesstothisrecordgroup?（）A.Allformsintheapplication.B.Anyformsopenedbytheuserwhoinitiatedtherecordgroup.C.OnlytheformissuingtheCREATE_GROUPbuilt-in.D.Anyformsreferencedbytheformthatcontainstheprocedure.