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【单选题】
下述关于数据库系统的叙述正确的是( )。A.
数据库系统减少了数据冗余
B.
数据库系统避免了一切冗余
C.
数据库系统中数据的一致性是指数据类型一致
D.
数据库系统比文件系统能管理更多的数据
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举一反三
【单选题】American people's idea of mastering Nature can be seen in the following activities ( ).
A.
They moved the American frontier westward.
B.
The construction of dams that hold back the waters of large rivers.
C.
The construction of tunnels that go through mountains.
D.
All of the above.
【单选题】According to the man, ______for the applicant.
A.
mastering a foreign language is necessary
B.
having ambitious ideas about future is important
C.
mastering English is very important
D.
working extra hours is required
【单选题】American people's idea of mastering Nature can be seen in the following activities ( ).
A.
They moved the American frontier westward.
B.
The construction of dams that hold back the waters of large rivers.
C.
The construction of tunnels that go through mountains.
D.
All of the other three choices are correct.
【单选题】—We’ll take the conditions into careful consideration ______ you have attached to this contract. —Thanks. Hope for further cooperation.
A.
as
B.
which
C.
where
D.
what
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