冷冻精液的解冻温度和解冻后的精液温度有何区别？

A. To remove missing backup set pieces physically from disk
B. To remove metadata related to backup set pieces in the control file and the recovery catalog
C. To mark as deleted records in the control file and the recovery catalog associated with obsolete backup sets
D. To delete backup set pieces associated with backups that are no longer needed due to retention criteria
E. To remove old versions of RMAN backu

A. 不须
B. 宜
C. 应
D. 可

A. 金属材料
B. 皮肤
C. 铝合金材料
D. 钢和铜