当两电源参数完全相同，且之间线路各点参数完全相同，则振荡中心一定在（）。 ["靠近一侧电源","靠近另一侧电源","线路中点"]
You performed the RMAN database backup with the KEEP option.Which two statements are true about this backup?（） (Choose two) [" The KEEP option overrides the configured retention policy"," The KEEP option is an attribute of an individual backup piece"," The backup contains only data files and archived redo log files"," The backup contains data files, the server parameter file and the control file even if the control file auto backup is disabled"]
节流板用于测定：（） ["液位","流量","压力"]
油气管道系统中的各种仪表是用来测量（）的必要设备。 ["A、运行参数 ","B、压力 ","C、温度 ","D、流量"]
Click the Exhibit button. What is the result？（） ["Value is： 8","Compilation fails.","Value is： 12","Value is： -12"]
标准麻花钻最基本的修磨内容是修磨（）。
