2002年新成立一企业，其符合一般纳税人条件的企业，应在（）申请办理一般纳税人认定手续。 办理税务登记的同时。 发生首笔增值税业务时。 开业6个月之内。 次年1月底前。
Examine the following command: CREATE TABLE (prod_id number(4), Prod_name varchar2 (20), Category_id number(30), Quantity_on_hand number (3) INVISIBLE); Which three statements are true about using an invisible column in the PRODUCTS table?（） The %ROWTYPE attribute declarations in PL/SQL to access a row will not display the invisible column in the output.。 The DESCRIBE commands in SQL *Plus will not display the invisible column in the output.。 Referential integrity constraint cannot be set on the invisible column.。 The invisible column cannot be made visible and can only be marked as unused.。 A primary key constraint can be added on the invisible column.。
《包氏父子》逼真地描绘了可悲的父亲老包和可笑的儿子小包，而且还通过这对父子的矛盾，表现了社会的变化，是（）小说创作的代表作之一。
You wish to enable an audit policy for all database users, except SYS, SYSTEM, and SCOTT.You issue the following statements: SQL> AUDIT POLICY ORA_DATABASE_PARAMETER EXCEPT SYS;SQL> AUDIT POLICY ORA_DATABASE_PARAMETER EXCEPT SYSTEM; SQL> AUDIT POLICY ORA_DATABASE_PARAMETER EXCEPT SCOTT; For which database users is the audit policy now active?（） All users except SYS。 All users except SCOTT。 All users except sys and SCOTT。 All users except sys, system, and SCOTT。
溶解乙炔气瓶：瓶内（），用于充装乙炔的气瓶。 装有多孔填料及溶剂。 什么也没有。 实心。
In the parameter file of your production database， the CONTROL_FILE_RECORD_KEEP_TIME parameter is set to 31. What would be the impact of this setting on the backup that is being performed by using Recovery Manager （RMAN）？（）
