The Automatic Database Diagnostic Monitor (ADDM) analysis runs every 60 minutes on your database. Your database is facing a series of interrelated problems over a period of two hours. You need to ensure that the ADDM analysis is run over a time span of two hours in future. What would you do?()
A. Create two custom ADDM tasks.
B. Modify the AWR snapshot time interval to two hours.
Create a new scheduler window for a time period of two hours.
D. Modify the Automatic Workload Repository (AWR) snapshot retention period to two hours.
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加热炉点火前()进行置换。
A. 非净化风
B. 氮气
C. 蒸汽
D. 净化风
()造成的机械设备事故,按照机械设备事故性质区分,属于责任事故。
A. 设计缺陷
B. 违章作业
C. 雷击
D. 产品标准
线路检修时,接地线一经撤除,即认为线路已带电,任何人不得再登杆作业
A. 正确
B. 错误
采掘工作面年度和月度水害预测资料及时报送矿井总()及生产安全部门。