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In your production database， you observe that users’ transactions are consuming a lot of resources and you plan to impose resource restrictions by using Resource Manager.  For which three resources can you enable usage restrictions by using Resource Manager？（）
A:CPU usage
B:degree of parallelism
C:number of open cursors
D:number of sorts performed
E:idle time for blocking sessions
F:number of disk I/O operations performed
G:number of memory I/O operations performed

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出自：Oracle认证

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