GSM逻辑信道中的广播信道有广播控制信道、频率校正信道和专用控制信道三种类型。
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矿用防爆型电气设备是按照国家标准()生产的专供煤矿井下使用的防爆电气设备。
A. GB3936²1-2000
B. G3036²1-2000
C. GB3136²1-2000
D. GB3836²1-2010
在特殊情况下,可以凭领导口头意见,边办理审批手续,边钻开高含硫油气层。()
A. 正确
B. 错误
当旅行社推销某些客源层比较集中的特殊旅游产品时,最好采用()销售渠道策略。
A. 直接性
B. 广泛性
C. 专营性
D. 选择性
You notice that the performance of your production 24/7 Oracle database significantly degraded.Sometimes you are not able to connect to the instance because it hangs. You do not want to restart thedatabase instance.How can you detect the cause of the degraded performance?()
A. Enable Memory Access Mode, which reads performance data from SG
B. Use emergency monitoring to fetch data directly from SGA analysis.
C. Run Automatic Database Diagnostic Monitor (ADDM) to fetch information from the latest Automatic Workload Repository (AWR) snapshots.
D. Use Active Session History (ASH) data and hang analysis in regular performance monitoring.
E. Run ADDM in diagnostic mode.