检查空鼓应采用（）的方法。 A.钢尺检测 。 B.塞尺检测 。 C.拐尺检测 。 D.敲击。
You are maintaining your database in Oracle10g. You are not using the recovery catalog to maintain the backup information of your database. Which file can be used as a repository to store information regarding the RMAN backup？（） online redo log files。 alert log files。 control file。 datafiles associated with the SYSTEM tablespace。
最早的标注语言是（） XML。 HTML。 VRML。 SGML。
建筑石膏的特性包括（）。 凝结硬化快。 不溶于水。 硬化时体积微膨胀。 防火性能好。 石膏制品密实度高。
You are in the middle of a transaction and very crucial data has been modified. Because of a hardware failure， the instance has shut down before synchronizing all the database files. Which two statements are true？（） On startup， SMON coordinates instance recovery.。 On startup， CKPT coordinates instance recovery.。 On startup， use RMAN to perform instance recovery.。 Uncommitted changes will be rolled back after the database is opened.。 On startup， perform media recovery and then instance recovery.。 On startup， all the files will be synchronized and you get both committed and uncommitted data.。
关于分离与牵拉的区别说法正确的是：（）
