多项选择题 Whichtwofiletypesmustbeincludedinacloseddatabasebackuptakenwithoperatingsystemcommands？（）

多项选择题 WhichfouroccurduringtheprocessingofarequestusingOracleSharedServer？（）

单项选择题 You have lost all members of your current redo log file group. You issue this query： SQL> select * from v$log；  GROUP#    SEQ#     BYTES        ARC STATUS            FIRST_NAME  1                  60           153600        NO INACTIVE            01-03-09：19：34  2                  61           153600        NO CURRENT            01-03-09：19：50  You then perform an incomplete recover. You receive this message： ORA-00279：  change 309141...03/09/01 19：50：14 Needed for thread 1  ORA-00289： suggestion ： /disk1/archive/arch_61.rdo ORA-00280： change 309043 for thread 1 is in  sequence #61 Specify log： {=suggested | filename | AUTO | CANCEL} How should you respond to this message？（）