Which three statements are true concerning the multitenant architecture?（） Each pluggable database (PDB) has its own set of background processes.。 A PDB can have a private temp tablespace.。 PDBs can share the sysaux tablespace.。 Log switches occur only at the multitenant container database (CDB) level.。 Different PDBs can have different default block sizes.。 PDBs share a common system tablespace.。 Instance recovery is always performed at the CDB level.。
游戏活动的外显因素中，最引人注目的部分是（） 表情。 动作。 角色扮演。 言语。
A data file become corrupted in your database due to bad sectors on the disk. Because of corruption， you lost all the important tables in that data file. Which method would you use for recovery？（） Flash back all the tables in the data file， one by one.。 Restore the data file to a new location and perform a media recovery.。 Flash back the database， there is no need to restore the data file.。 Restore the data file from the most recent backup and flash the database.。
At a run time， each Oracle Weblogic Server instance in a given domain creates an in-memory representation of the configuration described in this document（） mds-mbeans.xml。 config.xml。 policy.xml。 data.xml。
弯沉值检验时，弯沉仪由贝克曼梁、百分表及表架组成，贝克曼梁由合金铝制成，长度比为（）。 1：1。 2：1。 3：1。 4：1。
GoogleAppEngine目前支持的语言有（）
