Which command while in a vi session will change the currently selected word?（） ec。 wc。 ew。 cw。
某流域（为闭合流域）上有一场暴雨洪水，其净雨量将（） 等于其相应的降雨量。 大于其相应的径流量。 等于其相应的径流量。 小于其相应的径流量。
An administrator suspects problems on a SCSI hard disk，but upon running diagnostics，no errors were found. What must be done to check the condition of the drive？（） Run diag and select the ‘Certify Media’ task.。 Perform a read and write test on the disk and monitor errorlog.。 Update the disk firmware to the latest level and monitor errorlog.。 Format the disk to ensure bad blocks are omitted from the disk layout.。
Automatic Shared Memory Management is disabled for your database instance. You realize that there arecases of SQL statements performing poorly because of repeated parsing activity， resulting in degradation ofperformance. What would be your next step to improve performance（） Run the SQL Access Advisor。 Run the Memory Advisor for the sga.。 Run the Memory Advisor for the pga.。 Run the Memory Advisor for the shared pool.。 Run the Memory Advisor for the buffer cache。
（）在定性访问中起着重要的作用，但却不适于在自填式问卷中使用。 多选题。 排序题。 量表题。 开放题。
What other type of document accompanies the SAPR Guide to provide guidelines and pointers for use during Pre-Sale Reviews？ （）
