You work as a database administrator for Certkiller .com. In the middle of a transaction， a user session was abnormally terminated but the instance is still up and the database is open. Which two statements are true in this scenario？（） Event Viewer gives more details on the failure.。 The alert log file gives detailed information about the failure.。 PMON rolls back the transaction and releases the locks.。 SMON rolls back the transaction and releases the locks.。 The transaction is rolled back by the next session that refers to any of the blocks updates by the failed transaction.。 Data modified by the transaction up to the last commit before the abnormal termination is retained in the database.。
甲为投身恐怖主义活动而参加了某国际恐怖主义组织，法院认定甲构成参加恐怖组织罪。甲的行为属于（） 预备犯。 实行犯。 帮助犯。 未遂犯。
A new report process containing a complex query is written, with high impact on the database. You wantto collect basic statistics about query, such as the level of parallelism, total database time, and the number of I/O requests. For the database instance STATISTICS_LEVEL, the initialization parameter is set to TYPICAL and theCONTROL_MANAGEMENT_PACK_ACCESS parameter is set to DIAGNOSTIC+TUNING. What should you do to accomplish this task?（） Execute the query and view Active Session History (ASH) for information about the query.。 Enable SQL trace for the query.。 Create a database operation, execute the query, and use the DBMS_SQL_MONITOR. REPORT_SQL_MONITOR function to view the report.。 Use the DBMS_APPLICATION_INFO.SET_SESSION_LONGOPS procedure to monitor query execution and view the information from the V$SESSION_LONGOPS view.。
（）的作用方向恒定，与运动方向无关。 反抗转矩。 离心式转矩。 位能转矩。 恒功率转矩。
You performed an incomplete recovery on your Oracle Database 10g database using the following command： SQL> RECOVER DATABASE 2 UNTIL TIME ’2004-08-05：12：10：03’ 3 USING BACKUP CONTROLFILE； In which situation would the above recovery be required？（） A user table was lost at the specified time.。 A redo log file was lost at the specified time.。 The backup control file is on a faster disk than the current one.。 The current control file has a different path compared with the intended time of recovery.。 The current control file does not match the physical structure of the database at the intended time of recovery.。
丁烷罐在冬季由于罐压及罐温度都比较低，故为保证丁烷配比泵正常运行需（）
