所谓()即是为了使信号便于传输、减少干扰和易于放大,使一种波形参数按另一种信号波形变化的过程。
A. 解调
B. 调制
C. 载波
D. 调制波
省、自治区、直辖市人民政府根据实际情况,可以将城镇居民社会养老保险和新型农村社会养老保险合并实施。
A. 正确
B. 错误
You are creating a view to join the Customers and Orders tables in a SQL Server 2005 database. You need to ensure that the view cannot be affected by modifications to underlying table schemas. You want to accomplish this goal by using the least possible amount of overhead. What should you do?()
A. Create CHECK constraints on the tables.
B. Create a DDL trigger to roll back any changes to the tables if the changes affect the columns in the view.
Create the view, specifying the WITH SCHEMABINDING option.
D. Create the view, specifying the WITH CHECK option.
国外学者伊丽莎白·库布勒·罗斯总结了个人有接受自己不可避免的死亡或他人的死亡时会经历的心路历程是()。
A. 否认期—抑郁期—逃离期—接受期—退缩期
B. 质疑期—愤怒期—逃离期—接受期—退缩期
C. 质疑期—愤怒期—讨价还价期—抑郁期—接受期
D. 否认期—愤怒期—讨价还价期—抑郁期—接受期