You work as a database administrator for Supportcenter.cn. You are using Recovery Manager （RMAN） to perform backups in your databases. Which four backup operations can be performed using RMAN？（） ["A backup of the target database when it is mounted","A backup of online redo log files when the database is open","A backup of only used data blocks in the file beingbeingbackup up","A backup of online， read\/write data files when the database is open","A backup of only those data blocks that have changed since a previous backup","A backup of online， read\/write data files when the database is in the NOMOUNT state."]
微量元素
如何建立小企业的社会道德？
Given two files, GrizzlyBear.java and Salmon.java: If both classes are in the correct directories for their packages, and the Mammal class correctly defines the findSalmon() method, which change allows this code to compile?（） ["add import animals.mammals.*; at line 2 in Salmon.java","add import animals.fish.*; at line 2 in GrizzlyBear.java","add import animals.fish.Salmon.*; at line 2 in GrizzlyBear.java","add import animals.mammals.GrizzlyBear.*; at line 2 in Salmon.java"]
在ISO9001族标准中，内部审核时（）。 ["内部质量管理体系审核","内部产品质量审核","内部过程质量审核","内部质量管理体系、产品质量、过程质量的审核"]
小企业如何综合利用各种法律，以达到最佳经营效益？
