多选题Which two statements are true regarding Health Monitor checks in Oracle Database 11g？（）AHealth Monitor checks can be used to scan the contents of the redo log and archive logs for accessibility and corruption.BHealth Monitor checks can be used to verify the integrity of database files and report failures if these files are inaccessible，corrupt or inconsistent.CHealth Monitor checks can be used to verify the contents of dictionary entries for each dictionary object and fix it automatically.DHealth Monitor checks are always initiated manually when there is some critical error.
多选题
Which two statements are true regarding Health Monitor checks in Oracle Database 11g？（）
A
Health Monitor checks can be used to scan the contents of the redo log and archive logs for accessibility and corruption.
B
Health Monitor checks can be used to verify the integrity of database files and report failures if these files are inaccessible，corrupt or inconsistent.
C
Health Monitor checks can be used to verify the contents of dictionary entries for each dictionary object and fix it automatically.
D
Health Monitor checks are always initiated manually when there is some critical error.
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