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You executed the STARTUP MOUNT command to start your database. For which database operation do you need to start the database in the MOUNT state？（）
A:renaming the control files
B:dropping a user in your database
C:enabling or disabling redo log archiving
D:dropping a tablespace in your database
E:re-creating the control files， after you lost all the control files in your database

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出自：Oracle认证

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