【单选题】DBS的核心是数据库。由于数据库是根据()建立的,因而其是DBS的基础。
【单选题】— Where is your father? — He Australia and he Sydney for two weeks.
A.
has been to;has been in
B.
has gone to;has been in
C.
has been in;has been to
【简答题】请说出以下几个概念的关系:DBS的核心是( ),DBMS的管理者是( ),结构化的数据文件在DBS中称为( )。
【简答题】A.He has stayed on campus. B.He has been in an academic conference. C.He has been ill in hospital. D.He has been on vocation.
【单选题】I want to know how long________________________ [ ]
【单选题】ZDL0052适合自由回忆学习研究范型的例子是( )。
【单选题】— Where is your father? — He Australia and he Sydney for two weeks.
A.
has been to;has been in
B.
has gone to;has been in
C.
has been in;has been to
D.
has gone to;has been to