You set the recovery window to seven days and the backup optimization to ON using the CONFIGURE command of Recovery Manager （RMAN）. The most recent backup of the TOOLStablespace to disk was taken on January 3. The TOOLStablespace is read-only.On February 21， when you execute a command to back up all the tablespaces to disk， you find that RMAN backs up the TOOLS tablespace also， even though the contents of the tablespace have not changed after the backup on January 3. Because there are no changes made to the TOOLStablespace， you decide that the tablespace should not be backed up by RMAN. What can you do to skip backing up the TOOLStablespace without changing the current backup optimization setting？（） configure a default device for RMAN backups。 temporarily disable the retention policy for RMAN backups。 configure automatic channel allocation for RMAN backups。 use the CONFIGURE command to reconfigure the recovery window to 60 day。
You work as a database administrator for Certkiller .com. You are using three database， Certkiller DB01， Certkiller DB02， and Certkiller DB03， on different host machines in your development environment. The database serverconfiguration， such as IP address and listener port number， change frequently due to development requirements， and you havethe task of notifying the developers of the changes. Which connection method would you use to overcome this overhead？（） Host naming。 Local naming。 Easy Connect。 External naming。 directory naming。
下述关于受体的认识，哪些是正确的（） 介导细胞信号转导的功能蛋白质。 受体对相应的配体有较高的亲和力。 受体对相应的配体有较高的识别能力。 具有高度选择性和特异性。 一个细胞上同种受体只有一种亚型。
In which scenarios would you rebuild an index？（） when you need to disable the index usage。 when you need to change storage options。 when you need to enable index monitoring。 when you need to move the index to another tablespace。
象征性游戏（符号游戏）
垂直接地体在地沟内的打入深度应不小于（）m，若地质较硬导致角钢无法打入到要求的深度，可以将角钢的多余部分去除。
