Identify two situations in which you can use Data Recovery Advisor for recovery.（） The user has dropped an important table that needs to be recovered.。 The database files are corrupted when the database is open.。 You are not able to start up the database instance because the required database files are missing.。 The archived log files are missing for which backup is not available.。
原则上吊挂只能作辅助支撑，最大支撑跨距不大于（）mm。 1000。 2000。 3000。 4000。
Which code， inserted at line 14， sets the value of b to 314.159，26？（） b=nf.parse（input）；。 b=nf.format（input）；。 b=nf.equals（input）；。 b=nf.parseObject（input）；。
A media failure has occurred. This has resulted in all the members of the next hop log group being rendered inaccessible to the log writer process （LGWR） at a log switch. How does this failure affect the operational database？（） The database re-created the missing redo log files automatically.。 The database continues to function normally with the existing files.。 The database allows only queries， no other statements are allowed.。 The database returns and error and the database instance shuts down.。 The user sessions that generate redo logs are terminated automatically.。
破乳剂的代号是（） DOAT-A1221。 RP-6075。 COREXIF2774。
对成功或失败进行归因时，属于个人内部的因素有（）
