Which of the following instance configuration information does not come with a default value， and must be provided by the installer？（） Instance name。 Merchant key。 Database name。 Site Admin ID。 Security port numbers for the administration tool。
我国历史上完成从奴隶制向封建制的过渡，主要是通过（）。 兼并战争。 变法运动。 国家统一。 赋税改革。
You performed a backup of the flash recovery area by using the following command for the first time： RMAN> BACKUP RECOVERY AREA; Which files in the flash recovery area are backed up？（） flashback logs。 current control file。 control file autobackups。 incremental backup set。
While Monitoring the space usage in your database that is in ARCHIVELOG mode you observed that the flash recovery area does not have enough free space to accommodate any more files and you do not have necessary permissions to add more space to it. Identify the two events that can occur in the event of a log switch？（） An entry is created in the alert log file and the database instance continues to function normally。 The log switch hangs occur for transactions until free space is available in the flash recovery area。 The Oracle database server deletes a file that is on the obsolete file list to make free space in the flash recovery area。 The database instance status is implicitly changed to RESTRICTED mode and file creations to the flash recovery area are prevented。
JZ-7型空气制动机机能检查时，自阀、单阀手柄均置运转位，列车管压力指示值应为（）。 400kPa或600kPa。 500kPa或650kPa。 500kPa或600kPa。 450kPa或600kPa。
Which of the following is used in an IBM Blade Center to provide cooling？（）
