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From the V$SESSION_LONGOPS view， you find that some of the database users have long-running queries that consume a lot of CPU time. This causes performance problems for other users in the database， who have much shorter queries. 
You would like to make sure that the users with large queries do not use all the CPU time， but you still do not want to terminate them with an error message. 
Which method would you follow to achieve this？（）

When running the tablespace point-in-time command   recover tablespace users until time ,,10/06/2008:22:42:00 auxiliary destination ,,c:\oracle\auxiliary; you receive the following error:  RMAN-00571: ===========================================================  RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS  =============== RMAN-00571:  ===========================================================  RMAN-03002: failure of recover command at 10/08/2008 16:00:30  RMAN-20202: Tablespace not found in the recovery catalog  RMAN-06019: could not translate tablespace name "USERS"   What is the likely cause of the error?（）  The database is in ARCHIVELOG mode.。  There is not a current backup of the database available.。  The USERS tablespace has dependent objects in other tablespaces and can not be a part of a TSPITR alone.。  The USERS tablespace is not eligible for TSPITR because it has invalid objects.。  The recover tablespace command is incorrect and generates the error.。 国家电网公司对风电场功率预测的要求是什么？ Which of the following customer environments is addressed by IBM System Storage N series gateways?（）  a customer with CIFS, NFS and GPFS requirements 。  a customer wanting to natively implement Easy Tier 。  a customer who has large block sequential write requirements 。  a customer who needs to consolidate multiple storage controllers under one managementinterface&e。 Given: Which two, inserted at line 11, will allow the code to compile?（） public class MinMax<?> {。 public class MinMax<? extends Number> {。 public class MinMax<N extends Object> {。 public class MinMax<N extends Number> {。 public class MinMax<? extends Object> {。 public class MinMax<N extends Integer> {。 能产生制动力并能向电网反馈电能的制动方式是（）。 磁轨制动。 涡流制动。 电阻制动。 再生制动。

From the V$SESSION_LONGOPS view， you find that some of the database users have long-running queries that consume a lot of CPU time. This causes performance problems for other users in the database， who have much shorter queries. 
You would like to make sure that the users with large queries do not use all the CPU time， but you still do not want to terminate them with an error message. 
Which method would you follow to achieve this？（）