Which code fragment， inserted at line 23， allows the code to compile？（） df = new DateFormat（）；。 df = Date.getFormat（）；。 df = date.getFormat（）；。 df = DateFormat.getFormat（）；。 df = DateFormat.getInstance（）；。
在游戏治疗中，首先采用了“娃娃游戏”技术的是（） 认知发展学派。 精神分析学派。 元交际理论。 维果茨基理论。
轴承合金由于本身（）较低，故通常都将它浇铸在（）、（）或（）的轴瓦基体上。
The database is running in ARCHIVELOG mode and the FORMAT option is not configured in RMAN for disk backups. You configured the flash recovery area location and size by using the DB_RECOVERY_FILE_DEST and DB_RECOVERY_FILE_DEST_SIZE initialization parameters. Which statement is correct in this scenario？（） If the FORMAT option to the RMAN BACKUP command is specified， then RMAN creates backup pieces and image copies in the flash recovery area with names in the Oracle Managed Files （OMF） format.。 If any local destinations for LOG_ARCHIVE_DEST_n are set， then archived redo logs are stored in these destinations as well as in the flash recovery area.。 If the flash recovery area location is configured using the DB_RECOVERY_FILE_DEST initialization parameter， then the RMAN backup of Oracle managed datafiles （OMF） only will go to the flash recovery area by default.。 If no other destination is configured for recovery files， then RMAN places the control file autobackups in the flash recovery area by default.。
下列敷设方式中属于管沟敷设的是（）。 高支架。 通行管沟。 不通行管沟。 低支架。 半通行管沟。
Which tasks can be accomplished using the Enterprise Manager Support Workbench in Oracle Database 11g？（）
