单项选择题
A. The subplan must belong to the consumer group， SYS_GROUP.
B. The total CPU usage at any given level must be less than 100%.
C. The subplans can be used to restrict the degree of parallelism for a user.
D. You can use a resource plan instead of a consumer group to implement a priority ranking within the plan.
多项选择题 YouareusingOracleDatabase10g.YouperformedanincompleterecoveryofyourdatabaseandopenedthedatabasewiththeRESETLOGSoption.WhatistheeffectofopeningthedatabasewiththeRESETLOGSoption？（）
多项选择题 Foranincompleterecovery，whichfourbackuptypescanbeusedbyRecoveryManager（RMAN）torestoredatafiles？（）
多项选择题 YouhavesetthevalueoftheNLS_TIMESTAMP_TZ_FORMATparameterintheparameterfiletoYYYY-MM-DD.Thedefaultformatofwhichtwodatatypeswouldbeaffectedbythissetting？（）