在引用对象时，将该对象所在的命名空间作为前缀，这种命名空间的引用方法称之为（），另外还可以通过使用（）语句定义“别名”来引用命名空间。
An IT manager has been trying to configure Cisco Unified CallManager Express without success. The IT manager has decided that there might be more success with the Automated Setup Utility. To start this process, what command should be executed first?（） ["auto-setup ","auto assign ","no telephony-service ","auto telephony-service ","telephony-service auto ","telephony-service setu"]
采煤质量标准化标准对文明生产的规定¬下列哪些？（） ["巷道无积水（长5m，深0.1m）","无浮渣，杂物","材料、设备摆放整齐并有明显标志","电缆、管路吊挂整齐"]
通用类型系统包括（）和（）两种类型。
Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER NOT NULL EMP_NAME VARCHAR2(30) JOB_ID VARCHAR2(20) DEFAULT 'SA_REP' SAL NUMBER COMM_PCT NUMBER MGR_ID NUMBER DEPARTMENT_ID NUMBER You need to update the records of employees 103 and 115. The UPDATE statement you specify should update the rows with the values specified below: JOB_ID: Default value specified for this column definition. SAL: Maximum salary earned for the job ID SA_REP. COMM_PCT: Default value specified for this commission percentage column, if any. If no default value is specified for the column, the value should be NULL. DEPARTMENT_ID: Supplied by the user during run time through substitution variable. Which UPDATE statement meets the requirements?（） ["UPDATE employees SET job_id = DEFAULT AND Sal = (SELECT MAX(sal) FROM employees WHERE job_id = 'SA_REP') AND comm_pct = DEFAULT AND department_id = &did WHERE employee_id IN (103,115);","UPDATE employees SET job_id = DEFAULT AND Sal = MAX(sal) AND comm_pct = DEFAULT OR NULL AND department_id = &did WHERE employee_id IN (103,115) AND job_id = 'SA_REP';","UPDATE employeesC.UPDATE employees SET job_id = DEFAULT, Sal = (SELECT MAX(sal) FROM employees WHERE job_id = 'SA_REP'), comm_pct = DEFAULT, department_id = &did WHERE employee_id IN (103,115);","UPDATE employeesD.UPDATE employees SET job_id = DEFAULT, Sal = MAX(sal), comm_pct = DEFAULT, department_id = &did WHERE employee_id IN (103,115) AND job_id = 'SA_REP';","UPDATE employees SET job_id = DEFAULT, Sal = (SELECT MAX(sal) FROM employees WHERE job_id = 'SA_REP'), comm_pct = DEFAULT OR NULL, department_id = &did WHERE employee_id IN (103,115)"]
（）是一位具有“社会科学家”气质的小说家。
