系统振荡与短路同时发生，对于高频保护来说（）。 ["会误动","会拒动","会正确动作"]
Given that c is a reference to a valid java.io.Console object，which two code fragments read a line of textfrom the console？（） ["String s = c.readLine（）；","char[] c = c.readLine（）；","String s = c.readConsole（）；","char[] c = c.readConsole（）；","String s = c.readLine（"%s"， "name "）；"]
按燃气流动方向，常安装在阀门下侧的附属设备是（）。 ["放散管","排水器","补偿器","绝缘法兰"]
检查蓄电池各单体开路电压，若低于2.13V或储存期超过6个月则应运用恒压限流法进行（） ["浮冲","替换","均衡充电"]
Your database is in NOARCHIVELOG mode and a logswitch happens every 20 minutes. On Thursday morning， media failure resulted in corruption of a data file belonging to the TOOLS tablespace. Backups are taken on every Sunday. What would you do in this situation？（） ["recover using Oracle Flashback Database technology","restore the data files from backup and perform a complete recovery","restore only the corrupted data file and perform tablespace recovery","restore the data files from backup and perform cancel-based recovery","restore the entire database from the most recent backup and start the instance and open the database"]
孤植
