You have specified the warning and critical threshold values of an application tablespace to be 60% and 70% respectively. From the tablespace space usage metrics， you find that the actual space usage has reached the specified warning threshold value， but no alerts have been generated. What could be the reason for this？（） The EVENT parameter was not set。 The SQL_TRACE parameter is set to FALSE。 The Enterprise Manager Grid Control is not used。 The STATISTICS_LEVEL parameter is set to BASIC。 The TIMED_STATISTICS parameter is set to FALSE。
秦始皇统一中国后采取“废分封，立郡县”的决策，其主要目的在于（）。 维护皇权的至高无上。 建立专制主义中央集权制度。 巩固统一的封建国家。 维护新兴地主阶级利益。
A corporation is not concerned about wireless use by Teleworkers. Authentication for any application first requires access via a web browser to a protected site. Given these requirements, choose the appropriate security feature to use to enforce the security policy.（） Authentication Proxy。 802.1X 。 Context-Based Access Control。 Intrusion Detection System。 Stateful firewall。
You work as a database administrator for Certkiller .com. In your transaction application， you have scheduled a job to update the optimizer statistics at05：00 pm every Friday. The job has successfully completed. Which three pieces of information would you check to confirm that the statistics have been collected？（） Average row size。 Last analyzed date。 Size of table in bytes。 Size of table in database blocks。 Number of free blocks in the free list。 Number of extents present in the table.。
90年代小说创作存在的主要问题是什么？
You want to create a pie-style chart using the Chart Wizard. What must be you do to determine the fields available for use in this chart? （）
