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One of the tablespaces is read/x7fonly in your database. The loss of all control files forced you to re/x7fcreate the control file.  Which operation do you need to perform after re/x7fcreating the control file and opening the database？（）
A:drop and re­create the read­only tablespaces
B:rename the read­only data files to their correct file names
C:change the tablespace status from read/write to read­only
D:re­create the read­only tablespace because it is automatically removed

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出自：Oracle认证

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