未知题型 Wherecansubqueriesbeused?（）

未知题型 YouworkasadatabaseadministratorforSupportcenter.cn.YourdatabaseisopenedinNOARCHIVEKLOGmode.YoudecidetoplacethedatabaseinARCHIVELOGmode.Howwouldyoudothis？（）

未知题型 YouworkasadatabaseadministratorforSupportcenter.cn.Yourlistenerprocess，L1，iscurrentlylisteningtothreedatabases：CertKINDB04，SupportCenterDB05andSupportCenterDB06.UsingDatabaseConfigurationAssistant（DBCA）youcreateonemoredatabase，SupportCenterDB07，andenabledynamicregistration.WhichtwocommandsofListenerControlUtility（lsnrct1）wouldyouusetodeterminewhetherthedynamicregistrationoccurredforthedatabase，SupportCenterDB07，withtheL1listenerprocess？（）A.SHOWL1B.SPAWNL1C.STATUSL1D.SERVICESL1E.STATUSLISTENERF.SERVICESLISTENERG.SHOWcurrent_listener