单项选择题 Howisblock-changetrackingenabled？（）

多项选择题 During recovery， you need to know if log sequence 11 is in the online redo logs， and if so， you need to know the names of the online redo logs so you can apply them during recovery.  Which view or views would you use to determine this information？（）

多项选择题 You are trying to recover your database. During the recovery process， you receive the following error：   ORA-00279： change 5033391 generated at 08/17/2008 06：37：40 needed for thread 1ORA-00289： suggestion ：  /oracle01/flash_recovery_area/ORCL/archivelog/2008_08_17 /o1_mf_1_11_%u_.arc  ORA-00280： change 5033391 for thread 1 is in sequence #11 ORA-00278： log  file ，，/oracle01/flash_recovery_area/ORCL/archivelog/2008_08_17  /o1_mf_1_10_4bj6wnqm_.arc no longer needed for this recovery Specify log： {=suggested | filename | AUTO | CANCEL} ORA-00308： cannot open archived log  ，，/oracle01/flash_recovery_area/ORCL/archivelog/2008_08_17 /o1_mf_1_11_%u_.arc  ORA-27037： unable to obtain file status Linux Error： 2： No such file or directory Additional information： 3   How do you respond to this error？（）