Petri网的图简称为PNG，下述说法中（）不能表达其特征 Petri网是对离散并行系统的数学表示。 Petri网能够表达并发的事件。 Petri网通常被描述为一张有向图。 Petri网中事件到来就被激发。
You enabled Automatic Shared Memory Management. The initialization parameters are set as shown below： SGA_TARGET= 10GB SGA_MAX_SIZE = 14GB STREAMS_POOL_SIZE = 1GB SHARED_POOL_SIZE = 3GB Which two statements are correct in this scenario？ （） A maximum of 3 GB can be allocated to shared pool。 The value for SGA_TARGET can be increased up to a maximum of 15 GB。 A total of 14 GB memory will be allocated to the automatically tuned memory components.。 Increasing the value for SGA_TARGET will automatically increase the memory allocated for STREAMS_POOL_SIZE。 Increasing the value for SGA_TARGET to 12 GB will automatically increase the memory allocated to autotuned parameters。 Reducing the value for SGA_TARGET to 9 GB will automatically decrease the memory allocated to shared pool from 3 GB to 2 GB。
You work as a database administrator for Certkiller .com. In your development environmentenvironment， the developers are responsible for modifying the table structure according to the application requirements. However， you want to keep track of the ALTER TABLE commands being executed by developers， so you enable auditing to achieve this objective. Which two views would you refer to find out the audit information？（） DBA_AUDIT_TRAIL。 DBA_AUDIT_SESSION。 DBA_FGA_AUDIT_TRAIL。 DBA_COMMON_AUDIT_TRAIL。
做好全过程造价管理的信息化系统架构的顶层设计，明确总体结构的设计方案和不同层级的功能架构。其中总体结构设计要按照多层应用架构和（）的设计思路来构建，而系统功能架构要分级分层设置并规定好相应的权限，细分功能层次。 系统化。 模块化。 抽象化。 结构化。
The following parameter are set for your Oracle 12c database instance: OPTIMIZER_CAPTURE_SQL_PLAN_BASELINES=FALSE OPTIMIZER_USE_SQL_PLAN_BASELINES=TRUE You want to manage the SQL plan evolution task manually. Examine the following steps: 1. Set the evolve task parameters. 2. Create the evolve task by using the DBMS_SPM.CREATE_EVOLVE_TASK function. 3. Implement the recommendations in the task by using the DBMS_SPM.IMPLEMENT_EVOLVE_TASK function. 4. Execute the evolve task by using the DBMS_SPM.EXECUTE_EVOLVE_TASK function. 5. Report the task outcome by using the DBMS_SPM.REPORT_EVOLVE_TASK function. Identify the correct sequence of steps:（） 2，4，5。 2，1，4，3，5。 1，2，3，4，5。 1，2，4，5。
孔子主张行仁政、轻徭薄赋，这体现了中国历史上税收的（）。
