单项选择题 下面关于关系代数的不正确叙述是( )。

单项选择题 Whichofthefollowingperformancetoolscanbeusedtodetermineifasystemisthrashing？（）

单项选择题 HowcouldanAdministratorverifyiftherewereanyproblemsduringtheinstallationofWebSphereCommerceV5.6？（）

单项选择题 Yourcompany’sclientcomputersrunWindows7.Yourcompany’snetworkhasawirelessaccesspoint（WAP）.AuserreportsthatheregularlylosesconnectivitytotheWAP.YouneedtodisplayinformationaboutclientconnectivitytotheWAP.Whatshouldyoudo？（）A.UseEventViewertovieweventsfromasourceofWlanConn.B.UseEventViewertovieweventsfromasourceofWLANAutoConfig.C.Useauditpol.exetoenablefailedattemptsintheObjectAccesscategory.D.Useauditpol.exetoenablesuccessfulattemptsintheObjectAccesscategory.

单项选择题 Youneedtoresolvethedoublecountingoftransactionsissueintheexistingreports.Whatshouldyoudo?（）