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- 单项选择题 Note the following points describing various utilities in Oracle Database 1g：1. It enables the high-speed transfer of data from one database to another. 2. It provides a complete solution for the backup， restoration， and recovery needs of the entire database.3. It enables the loading of data from an external file into an Oracle database.4. It provides a tape backup management for the Oracle ecosystem. Which point describes Oracle Secure Backup（）
A、1
B、2
C、3
D、4
E、1， 2， and 4
F、1， 2， 3， and 4
- D
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