You are working on an Oracle Database 10g database that operates in the ARCHIVELOG mode. At 06：00 p.m.， you discovered that a table in the SYSTEM tablespace that does not belong to the data dictionary was dropped at 03：00 p.m. What would you do to recover the table？（） use the Flashback Transaction Query feature to identify the relevant SQL statement and use it to undrop the table。 restore the entire database from the most recent backup and open it。 recover the table by using the Flashback Table feature。 perform point-in-time recovery to recover the table。
木本地被类
Given： 12.Date date = new Date（）； 13.df.setLocale（Locale.ITALY）； 14.String s = df.format（date）； The variable df is an object of type DateFormat that has been initialized in line 11. What is the result if this code is run on December 14， 2000？（） The value of s is 14-dic-2000.。 The value of s is Dec 14， 2000.。 An exception is thrown at runtime.。 Compilation fails because of an error in line 13.。
Your test database is configured to run in NOARCHIVELOG mode. One of the data files in the USERStablespace is lost due to a media failure. You notice that all the online redo logs have been overwritten since the last backup. What would you do to recover the data file（） Take the USERS tablespace offline and re-create the lost data file.。 Shut down the instance， restore the data file from the last consistent backup， and restart the databaseinstance.。 Shut down the instance， restore all the database files from the last consistent backup， and restart thedatabase instance.。 Take the USERS tablespace offline， restore all the data files of the USERS tablespace from the lastconsistent backup， and make the tablespace online.。
流在井筒中流动时，其能量消耗表现在（） 滑脱损失大摩擦损失小。 滑脱损失小摩擦损失大。 滑脱和摩擦损失都小。
浇筑式沥青混凝土工艺特点包括（）。
