执行查询文件myquery.qpr的命令是（　　）。

A、DO myquery

B、DO myquery.qpr

C、DO QUERY myquery

D、RUN QUERY myquery

Using the LIST command in Recovery Manager (RMAN), which two pieces of information in the RMANrepository can be listed?（）

stored scripts in the recovery catalog

backups that can be deleted from disk

backup sets and image copies are obsolete

backups that do not have the AVAILABLE status in the RMAN repository RMAN

You have created a resource plan， DB_PLAN， using DBMS_RESOURCE_MANAGER.CREATE_SIMPLE_PLAN and you want to impose a restriction on utilization of resources by the database users. Which step must be performed before you can start using the resource plan？（）

A、 assign users to consumer groups

B、 set the resource plan for the instance

C、 configure a simple resource plan and specify plan directives

D、 configure a complex resource plan and specify plan directives

在笛卡儿坐标系中，当X轴的正向向左，Y轴和正向向上，那么Z轴的正向应向外。

A、对

B、错

（）是正确的E-mail地址。

A、mailto:Webmaster@ceiaeC.org

B、Wmailto:master@ceiaec.org

C、http：//www.ceiaeC.org

D、D.http：//www.ceiaeorg

简述色彩计划的特性。