题目内容

锅炉汽压、水温的变化会使水位产生较大的波动,有时甚至发生()或()事故。

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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 directive

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