什么是DBA? DBA应具有什么素质? DBA的职责是什么?

What is Mr. Freeman’s demand for students’ objects? Para. 10() A: make their objects say something, B: make their objects express an emotion, C: make their objects speak to every person looking at it

DAO指的是：（） A: Data Access Objects B: Delete Access Objects C: Date Access Operato D: Date Access Objects

The objective of image interpretation is: A: Identification and recognition of objects B: Measuring the thickness of objects C: Estimate the age of the objects D: None of the above

什么是DBA? DBA的职责有哪些？

A combination is the number of ways of selecting X objects out of n objects, irrespective of order.

请简述什么是DBA及DBA的作用。

数据库系统包括( )。 A: DB、DBA B: DB、DBMS C: DB、DBMS、DBA、OS、计算机硬件 D: DB、DBMS、DBA、计算机硬件

数据库系统包括______。 A: DB、DBMS B: DB、DBA C: DB、DBMS、DBA、用户 D: DB、DBMS、OS、DBA、用户

Objects have the property of ______ —although objects may know how to commu- nicate with one another across well-defined interfaces, they normally are not allowed to know how other objects are implemented.