The EMPLOYEES table has these columns:LAST_NAME VARCHAR2(35) SALARY NUMBER(8,2) HIRE_DATE DATEManagement wants to add a default value to the SALARY column. You plan to alter the table by using this SQL statement:ALTER TABLE EMPLOYEES MODIFY (SALARY DEFAULT 5000);Which is true about your ALTER statement?（） Column definitions cannot be altered to add DEFAULT values.。 A change to the DEFAULT value affects only subsequent insertions to the table.。 Column definitions cannot be altered to add DEFAULT values for columns with a NUMBER data type.。 All the rows that have a NULL value for the SALARY column will be updated with the value 5000.。
馈线入室处必须有回水弯，回水弯的底部与入室埠的水平高度要除以低于（）厘米。 10。 12。 8。 9。
You deploy Windows 7 and several custom Internet Explorer add-ons to 1，000 client computers. Internet Explorer closes when users run a specific Web application. You need to find out whether an add-on is the cause of the problem. What should you do？（） Start Internet Explorer in No Add-ons mode.。 Reset all Internet Explorer security zones to the default levels.。 Use Group Policy to turn on Internet Explorer 7 Standards mode.。 Use Group Policy to disable the Programs tab in Internet Explorer for all client computers.。
教师在教育教学活动中对学生各种表现，特别是对意外情况和偶发事件，能够及时作出灵敏的反应，并采取恰当措施和解决问题的特殊能力是指教师的（） 教学效能感。 教育机智。 教学监控能力。 教学反思。
结构化程序设计的主要特征与风格是什么？
In the Expression Editor panel of CRS Script Editor, why would you use the Java tab? （）
