Initially， for the Automatic Workload Repository （AWR） statistics， the retention period is set to 7 days， the collection interval is set to 30 minutes and the collection level is set to Typical in your production database. You have been using the Memory Advisor for the last three months to generate recommendations for tuning memory components. However， when you observe the Memory Advisor on a Friday， you find that the statistics are available only for two days， Thursday and Friday， of that week. What would have caused the statistics to be removed？（） On Wednesday， the statistics have been purged.。 On Wednesday， the retention period has been set to zero.。 On Wednesday， the collection interval has been set to zero.。 On Wednesday， the collection level has been changed to All.。 On Wednesday， the retention period has been set to one day.。 On Wednesday， the retention period has been set to two days.。 On Wednesday， the collection level has been changed to Typical.。 On Wednesday， the collection interval has been set to 1440 minutes.。
变电站（所）内铜金属性的设备接头在过热后，其颜色会变为（）。 黑色。 紫色。 浅红色。
You perform a backup using the following BACKUP command： RMAN> BACKUP AS COMPRESSED BACKUPSET DATABASE； Which statement is true of this command？（） A different procedure is required to restore a database from compressed backups。 The AS COMPRESSED clause of the BACKUP command provided by RMAN is used to create compressed backup sets and image copies.。 Using this command to create backups minimizes the bandwidth consumed。 Using this command to create backups improves the performance of the backup proce。
竣工决算应包括本项目从筹建到竣工投产全过程的全部实际投资，包括建筑工程费、安装工程费、设备工器具购置费、工程建设其他费、预备费，建设期贷款利息、铺底流动资金等构成投资的全部费用支出。
Which method will complete this class？（） public int compareTo（Object o）{/* more code here */}。 public int compareTo（Score other）{/* more code here */}。 public int compare（Score s1， Score s2）{/* more code here */}。 public int compare（Object o1， Object o2）{/* more code here */}。
靠近基站（）m空间内的树木应砍除，杜绝火灾隐患。
