Anetworktechnicianisinstallingaseriesofthreeaccesspointstocovertheentirewingofabuilding.Eachaccesspointhasawiredconnectionand802.11gisbeingusedforthewirelesstransmission.Whichofthefollowingchannelsshouldbeusedfortheaccesspoints？（）A.Channels1-6-11B.Channels1-3-5C.Channels7-11-1D.Channels2-4-6
Anetworktechnicianisinstallingaseriesofthreeaccesspointstocovertheentirewingofabuilding.Eachaccesspointhasawiredconnectionand802.11gisbeingusedforthewirelesstransmission.Whichofthefollowingchannelsshouldbeusedfortheaccesspoints？（）
A.Channels1-6-11
B.Channels1-3-5
C.Channels7-11-1
D.Channels2-4-6
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YouareresponsibleformanagingaSQLServer2005databasethatstoressalesinformation.Manyvaluesinncharcolumnsinthedatabasetablescontainprecedingortrailingspaces.Youneedtoimplementamechanismthatselectsthedatafromthetableswithoutleadingandtrailingspaces.YoursolutionmustbeavailableforreuseinTransact-SQLstatementsandviews.Whatshouldyoudo？（）A.CreateDMLtriggersthatquerytheinsertedanddeletedtables.B.CreateastoredprocedurethatcallstheLTRIMandRTRIMbuilt-infunctions.C.CreateaTransact-SQLfunctionthatcallstheLTRIMandRTRIMbuilt-infunctions.D.CalltheTRIMbuilt-infunction.
通常所说的同步卫星是指()。 A.静止卫星B.相位卫星C.随机卫星D.低轨道卫星