试述专营权管理的特点及其优点？
Evaluate the set of SQL statements: CREATE TABLE dept (deptno NUMBER(2), dname VARCNAR2(14), 1oc VARCNAR2 (13)); ROLLBACK; DESCRIBE DEPT What is true about the set?（） The DESCRIBE DEPT statement displays the structure of the DEPT table.。 The ROLLBACK statement frees the storage space occupies by the DEPT table.。 The DESCRIBE DEPT statement returns an error ORA-04043: object DEPT does not exist.。 The DESCRIBE DEPT statement displays the structure of the DEPT table only if there is a COMMIT statement introduced before the ROLLBACK statement.。
You create a package that contains PL/SQL variables that must be shared among several forms in the Travel application. You place the package in a library and attach the library to all the forms that need to share the data. Which parameter in the OPEN_FORM built-in must you set to ensure that changes made by one form are visible to the other forms in the application?（） data_mode 。 paramlist 。 query_mode 。 session_mode&e。
失业人员领取失业保险金后，重新就业再次失业的，失业保险缴费时间重新计算。
Evaluate the SQL statement: What is the result of the statement?（） The statement produces an error at line 1.。 The statement produces an error at line 3.。 The statement produces an error at line 6.。 The statement returns the employee name, salary, department ID, and maximum salary earned in the department of the employee for all departments that pay less salary then the maximum salary paid in the company.。 The statement returns the employee name, salary, department ID, and maximum salary earned in the department of the employee for all employees who earn less than the maximum salary in their department.。
李白《古风》第三首：“秦王扫六合，虎视何雄哉！挥剑决浮云，诸侯尽西来。明断自天启，大略驾群才。收兵铸金人，函谷正东开。……刑徒七十万，起土骊山隈。尚采不死药，茫然使心哀。……但见九泉下，金棺葬寒灰。”这首诗（）。
