You have been assigned to manage a set of databases. The previous DBA did not leave you notes regarding the structure of each of the databases. While analyzing an instance， you notice that the system identifier （SID） for the instance is set to ’+ASM’. What is the purpose of this instance？（） [" This instance is being used to manage the operating system files."," This instance is being used to manage the files of other databases."," This instance is being used to manage the instances of other databases."," This instance is being used to manage the background processes of other instances."]
壁挂空调不能安装在（）。 ["墙壁","门口","设备顶部","门上"]
Examine the command： SQL> DBMS_STATS.SET_TABLE_PREFS（’SH’， ’CUSTOMERS’， ’PUBLISH’， ’false’）； Which statement describes the effect of the above command（） ["Automatic statistics collection is stopped for the CUSTOMERS table.","Statistics for the CUSTOMERS table are locked and cannot be overwritten.","Existing statistics for the CUSTOMERS table become unusable for the query optimizer.","Subsequently， statistics gathered on the CUSTOMERS table are stored as pending statistics."]
In one of your online transaction processing （OLTP） applications， most users frequently modify the values， including the key values， of the application tables. Some users generate application reports by using multiple application tables. What is the best table structure that you can use to gain optimal performance？（） [" Heap table"," Object table"," External table"," Clustered table"," Global temporary table"," Index-organized table （IOT）"]
能使在同一轴心线上的两根轴，在机器运转过程中接合或分离的叫（） ["联轴器","制动器","离合器","控制器"]
知青题材反思小说基本上有两个反思角度，请举例分析其各自特点。
