[多选] You performed the RMAN database backup with the KEEP option.Which two statements are true about this backup?（） (Choose two)

You need to perform a block media recovery on the tools01.dbf data file in the SALES database by using Recovery Manager (RMAN). Which two are the prerequisites to perform this operation? （）(Choose two) You must configure block change tracking file。 You must have first level 1 backups for RMAN to restore blocks。 You must ensure that the SALES database is mounted or open。 You must have full or level 0 backups for RMAN to restore blocks。 You must take the tools01.dbf data file offline before you start a block media recovery。 You are maintaining your database in Oracle10g. You are performing an incomplete recovery because the tablespace， DATA1， was dropped and purged from the Recycle Bin. After performing an incomplete recovery， you open the database with the RESETLOGS option.  What will NOT be the impact of using the RESETLOGS option？（）  The log sequence for the database will restart from 1.。  The log sequence number will be written to the control file.。  The log sequence number will be written to the datafile headers.。  The log sequence number will be written to the initialization parameter file.。 哪些互动属于发布管理的职责（） 检查公司的计算机是否安装了非法软件。 缓存公司的所有授权软件的原始版本。 检查每个可用的软件版本。 处理发布后出现的故障。 You are performing an incomplete recovery because some important tables have been dropped and purged from the Recycle Bin. Which clause can you NOT use to perform the incomplete recovery by using the RMAN utility？（）  UNTIL CANCEL。  UNTIL SCN。  UNTIL SEQUENCE。  UNTIL TIME。 标准麻花钻最基本的修磨内容是修磨（）。 You performed the RMAN database backup with the KEEP option.Which two statements are true about this backup?（） (Choose two)