A customer has a file server using RAID-5 with 8KB sequential write operations. How should the disk controller cache be configured for optimal performance and data integrity？（） Use write-back cache with battery backup enabled。 Use write-through cache with battery backup enabled。 Use read-back cache with battery backup enabled。 Use read-through cache with battery backup enabled。
用人单位未办理社会保险登记的，由人民法院核定其应当缴纳的社会保险费。
维持需要
鼠笼式异步电动机不采用（）方法启动。 全压启动。 逐级切除启动电阻。 延边三角形启动。 Y-△降压启动。
You executed the following command in Recovery Manager （RMAN） to perform a backup of the DETTBS tablespace： RMAN> BACKUP TABLESPACE DETTBS； Under which conditions would this command execute successfully？ （） The database is in NOMOUNT state.。 The database is in ARCHIVELOG mode and the tablespace is online.。 The database is in ARCHIVELOG mode and the tablespace is offline.。 The database is in NOARCHIVELOG mode and the tablespace is online.。 The database is in NOARCHIVELOG mode and the tablespace is offline.。
对输油管线进行压力试验时，一般选用的试验介质为（）
