[单选]

During the installation of Oracle Database 11g，you do not set ORACLE_BASE explicitly. You selected the option to create a database as part of the installation. 
How would this environment variable setting affect the installation？（）  

简述固态扩散的条件 Which three statements are true about Flashback Database?（） Flashback logs are written sequentially, and are archived.。 Flashback Database uses a restored control file to recover a database.。 The Oracle database automatically creates, deletes, and resides flashback logs in the Fast RecoveryArea.。 Flashback Database can recover a database to the state that it was in before a reset logs operation.。 Flashback Database can recover a data file that was dropped during the span of time of the flashback.。 Flashback logs are used to restore to the blocks' before images, and then the redo data may be used to roll forward to the desired flashback time.。 简要叙述市场法的优点。 In the parameter file of your production database， the FAST_START_MTTR_TARGET parameter is set to 300 to optimize instance recovery. While observing the performance of the database during instance recovery， you find that the redo log files are not sized properly to support this activity. Which two sources could you use to determine the optimal size of the redo log files？（）  the V$LOG view。  the V$DBFILE view。  the V$LOGFILE view。  the V$INSTANCE_RECOVERY view。  Oracle Enterprise Manager Database Control。 水泥强度等级是根据胶砂法测定水泥（）的抗压强度和抗折强度来判定。 3日和7日。 3日和28日。 7日和14日。 7日和28日。

During the installation of Oracle Database 11g，you do not set ORACLE_BASE explicitly. You selected the option to create a database as part of the installation. 
How would this environment variable setting affect the installation？（）