Redo log files are not multiplexed in your database. Redo log blocks are corrupted in group 2， and archiving has stopped. All the redo logs are filled and database activity is halted. Database writer has written everything to disk. Which command would you execute to proceed further？（） RECOVER LOGFILE BLOCK GROUP 2；。 ALTER DATABASE DROP LOGFILE GROUP 2；。 ALTER DATABASE CLEAR LOGFILE GROUP 2；。 ALTER DATABASE RECOVER LOGFILE GROUP 2；。 ALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 2；。
论证为什么有且仅有14种Bravais点阵。
Which two are prerequisites for performing a flashback transaction?（） Flashback Database must be enabled.。 Undo retention guarantee for the database must be configured.。 EXECUTE privilege on the DBMS_FLASHBACK package must be granted to the user flashing back transaction.。 Supplemental logging must be enabled.。 Recycle bin must be enabled for the database.。 Block change tracking must be enabled tor the database.。
Which statement is true about mouse events? （） The cursor style can be set to CAUTION. 。 Double-clicking a mouse button can potentially fire six mouse event triggers. 。 The values for the SYSTEM.MOUSE_BUTTON_PRESSED system variable can only be 1 or 2. 。 Click and double-click button actions can only detect if the mouse is positioned in an item.。
大学生社会知觉的共同特征有（） 选择性。 显著性。 投射性。 两极性。
You are working on Oracle Database 10g， which is in ARCHIVELOG mode. All the archived log files are intact. In which scenario would performing a recovery require the opening of the database with the RESETLOGS option？（）
