噪音对人主要有哪些不利影响
When youre performing active database duplication，a backup of what kind is required？（） [" A current RMAN backup-set backup is required."," No backup is required."," An RMAN image backup is required."," A manual backup is required."," A "duplicate" preparatory backup is required."]
104电空制动机电磁阀部由（）电磁阀组成。 ["3个","4个","5个","6个"]
You plan to set up the Automatic Workload Repository (AWR) baseline metric thresholds for a moving window baseline. Which action would you take before performing this task?（） [" Compute the baseline statistics."," Take an immediate AWR snapshot."," Decrease the window size for the baseline."," Decrease the expiration time for the baseline."]
锅炉的热效率是指（）。
域名的概念及其法律特征
