[单选]
One of the users in the PROD database，Adams，complains that his update on the table，TRANS， is taking an unusually long time to complete. You find that the table gets locked by another database user before Adams starts his transactions，and you are unable to contact the user holding the table lock. As Adams is updating some crucial rows in the table， he should get the highest priority.
Which method would you use to overcome this problem？（）

A . execute the command， ALTER SESSION KILL ..， to kill the blocking session
B . execute the DBMS_SESSION.KILL_SESSION procedure to kill the blocking session
C . execute the command， ALTER SYSTEM KILL SESSION ..， to kill the blocking session
D . execute the command， ALTER SESSION UNLOCK ..， to release the lock for the blocking session
E . execute the command， ALTER SYSTEM UNLOCK SESSION ..， to release the lock for the blocking sessio

企业价值标准状况通常是指（）。 1MPA.293K。 1MPA.273K。 0.1MPA.293K。 0.1MPA.273K。 You have a durable subscriber, and the subscriber is down or not reachable when the message is produced. Which two options regarding the expiry of these messages are true?（） after the subscriber is unavailable for 10 minutes。 when the subscriber is available。 after the subscriber is unavailable for after an hour。 are available until the specified time elapses。 are expired instantly。往复式压缩机的活塞环在安装时，注意同组相邻活塞环周向开口应对齐。简述角色游戏的基本结构。

One of the users in the PROD database，Adams，complains that his update on the table，TRANS， is taking an unusually long time to complete. You find that the table gets locked by another database user before Adams starts his transactions，and you are unable to contact the user holding the table lock. As Adams is updating some crucial rows in the table， he should get the highest priority.
Which method would you use to overcome this problem？（）

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