养护进度计划措施
You have taken a Logical Volume Manager (LVM) snapshot backup of a volume that contains the MySQL data directory. Why is it important to remove snapshots after completing a RAW backup in this way?（） The snapshot size will continue to grow as changes to the volume are made。 The snapshots take a significant amount of disk space as they are a duplicate copy of the data。 The system can only support one snapshot per volume, and you need to remove it to be able to take your next backup。 The system keeps a copy of changes in memory and can cause an out of memory event。
普阀型避雷器的额定电压是指（）。 所装位置的额定线电压。 所装位置的额定相电压。 灭弧电压。
When tuning Automatic PGA Memory Management， which of the following views will provide the information specified？（） The V$PGA_TARGET_ADVICE view shows the predicted cache hit-ratio improvement if you increase PGA_AGGREGATE_TARGET。 The V$PGA_TARGET_ADVICE view shows how the V$SQL_WORKAREA histogram will change if you change the value of PGA_AGGREGATE_TARGET。 The V$PGA_TARGET_ADVICE_HISTOGRAM view shows how the V$SQL_WORKAREA_HISTOGRAM will change if you switch between Manual and Automatic PGA Memory Management。 The V$PGA_TARGET_ADVICE view shows how performance will improve for the different work areas if you switch from Manual to Automatic PGA Memory Management。
按图施工是施工阶段质量控制的一项重要原则，已批准的设计文件无疑是监理人进行质量控制的依据。
王某，女性，45岁，拟做胃大部切除术，术前该患者最主要的护理诊断是（）
