皮皮学，免费搜题
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搜题
【单选题】
View the Exhibit to examine the output of the DBA_OUTSTANDING_ALERTS view. After 30 minutes， you executed the following command： SQL> SELECT reason，metric_value FROM dba_outstanding_alerts； REASON METRIC_VALUE ------------------------------------------------------------ ------------ Tablespace [TEST] is [28 percent]full 28.125 What could be the reason for the elimination of the other rows in the output（）A.
An Automatic Workload Repository snapshot has been taken recently.
B.
The non-threshold-based alerts are transferred to DBA_ALERT_HISTORY.
C.
The threshold alerts conditions are cleared and the alerts are transferred to DBA_ALERT_HISTORY.
D.
The threshold alerts related to database metrics are permanently stored in DBA_ALERT_HISTORY but not the threshold alerts related to instance metrics.
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】标位于幻灯片窗格中时,单击“开始”选项卡的“幻灯片”组中的“新建幻灯片”按钮,插入的新幻灯片位于
A.
当前幻灯片之前
B.
当前幻灯片之后
C.
文档的最前面
D.
文档的最后面
【简答题】起落架的减震功能由轮胎和( )实现。
【简答题】起落架的减震功能由什么实现?