View the Exhibit and examine the highlighted alert. You have received an alert with the Category specified as Snapshot Too Old. Which page would you open from the Advisor Central page to determine the system recommendations to avoid such alerts in future?（）
A、 ADDM
B、 Memory Advisor
C、 Segment Advisor
D、 Undo Management
E、 SQL Tuning Advisor
F、 SQL Access Advisor
欧洲城市的城徽中，用黑熊作为城徽的是（）。
A、瑞士伯尔尼
B、德国柏林
C、华沙
D、布拉格
E、意大利
GPRS中的域名服务器（DNS）的主要功能是什么？
集合A＝{1，2，…，10}上的关系R＝{（x，y）：x，y∈A且x＋y＝10}，则R的性质为（ ）。
A、自反的
B、对称的
C、传递的，对称的
D、传递的
简述产品服务策略？
Your Oracle Database 10g is online when you execute the following statement： SQL>ALTER TABLESPACE MY_TABLESPACE FLASHBACK OFF； What is the result of executing this statement if the Flashback Database feature is already enabled in the database？（）
A、 The database does not record flashback logs for MY_TABLESPACE
B、 The tables residing in MY_TABLESPACE are not protected by the Recycle Bin.
C、 All the tablespaces except MY_TABLESPACE can be recovered using Flashback Database feature.
D、 None of the flashback technologies， such as Flashback Table， Flashback Transaction Query and Flashback Version Query can be used to recover individual rows within the objects from MY_TABLESPACE