论述资产评估的成本法。
Your database is set in NOARCHIVELOG mode and is backed up every night. There are 10 redo log groups on the database， each with three members， making a total of 30 redo log files. At lunchtime the server unexpectedly gets shut down. Upon restarting you notice that the data file belonging to the SYSTEM tablespace has become corrupted. You also notice that there have been 15 log switches during the day. Which solution should you use to recover as much committed data as possible？（） ["Restore the data file for the SYSTEM tablespace then open the database. ","Restore all redo logs form last night's backup, then restart the database. ","Perform a complete restore of all files from last night's backup. Data entered into the database today must be reentered. ","Mount the instance, take the SYSTEM tablespace offline, open the database, and then restore the data file, recover it, and bring the tablespace online.&e"]
同期回路中，当两个同期电压的相位不满足要求时，要使用（）以达到满足（）的目的。
How is UPSR and BLSR traffic rerouted during a protection switch when a complete fiber cable cut occurs?（） [" Traffic is switched from the first node receiving the AIS indication."," Traffic is switched from the far side of the failure, allowing handshaking to occur."," UPSR traffic is switched from the terminating node, BLSR traffic is rerouted from the originating node in the ring."," UPSR traffic is switched from the terminating node, circuit by circuit. BLSR traffic is rerouted from the last reachable node in the ring."]
《齐民要术•序》：“舍本逐末，贤者所非，日富岁贫，饥寒之渐，故商贾之事，阙而不录。”以下叙述正确的是（）。①该书是我国现存最早最完备的农书②该书含有重农抑商的思想观念③该书系统地总结了我国6世纪以前黄河中下游地区的农牧业生产经验④该书还介绍了欧洲先进的水利技术和工具 ["①②③④","①②③","②④","①③"]
油润滑
