资产评估是对资产特定时点及特定市场条件下的客观价值的估计值。
Which package provides API’s for the SQL Tuning Advisor？（） [" DBMS_MONITOR"," DBMS_STATS"," DBMS_SQLTUNE"," DBMS_ADVISOR"]
L-O-R封堵三通中，卡环部位的紫铜垫起（）作用。 ["隔离","润滑","紧固","密封"]
发电机，主要变压器的非计划检修或停止备用，应予先（）小时提前申请。
In your database， UNDO_RETENTION has been set to 600 sec and UNDO tablespace is configured for RETENTION GUARANTEE. Which statement regarding RETENTION GUARANTEE is true？ （） ["Undo data is retained until the next full database backup.","No committed undo data will be overwritten for 10 minutes.","Committed undo data will be kept forever if not overwritten within 600 seconds.","Guarantees that requested undo information are available until the instance is shut down."]
我国的园林树木资源具有明显的特色，主要有以下四个方面：
