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.。
90年代初“私人化写作”与90年代后期“时尚化写作”有什么不同？
GoogleAppEngine目前支持的语言有（） Python语言。 C++语言。 汇编语言。 Java语言。
You have the following requirements in relation to the detection of block corruption for your database instance： Check for logical self-consistency of data blocks when modified in memory. Checksums are calculated before and after the block change. Checks are performed for the lost writes to the physical standby database. Which method would help you perform the above checks automatically？（） Set the DB_SECUREFILE parameter to PERMITTED。 Set the DB_ULTRA_SAFE parameter to DATA_ONLY。 Set the DB_LOCK_CHECKSUM parameter to TYPICAL。 Set the DB_LOST_WRITE_PROTECT parameter to TYPICAL。
普通热轧带肋钢筋的牌号分别是（）。 HPB300。 HRB300。 HRB335。 HRB400。
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（）
