（多选题）
Which two statements are true about the Automatic Diagnostic Repository （ADR）？（）
A The ADR base keeps all diagnostic information in binary format
B SQL*Plus provides the ADRI script， which can be used to work with ADR
C The ADR can be used for problem diagnosis only when the database is open
D The ADR can be disabled by settting the DIAGNOSTIC_DEST parameter to null
E The ADR can be used for problem diagnosis even when the database instance is down
F The ADR base is shared across multiple instances
正确答案
答案解析
略
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