水平分析是一种基于对未来利率预期的债券组合管理策略。()
参考答案:对
Twenty men fell into the water and were _____ by other boats. As a result, they missed the fighting on the beach.
A.picked out
B.picked over
C.picked up
D.picked on
数据的独立性是指______。
A.数据库的数据相互独立
B.DBMS和DB 相互独立
C.用户应用程序与数据库的数据相互独立
D.用户应用程序与DBMS相互独立