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Which two statements are true regarding Oracle Data Pump（）
A:EXPDP and IMPDP are the client components of Oracle Data Pump.
B:DBMS_DATAPUMP PL/SQL packages can be used independently of the Data Pump clients.
C:Oracle Data Pump export and import operations can be performed only by users with the SYSDBA privilege.
D:Oracle Data Pump imports can be done from the export files generated in the export utility of previous versions.
E:EXPDP and IMPDP use the procedures provided by DBMS_METADATA to execute export and import commands.

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出自：Oracle认证

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