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【简答题】
在数据库系统中，用户所见的数据模式为 A) 概念模式 B) 外模式 C) 内模式 D) 物理模式
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【单选题】____ the students likes the paintings. Which is wrong?
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The teacher as well as
B.
Nobody but
C.
The teacher besides
D.
All except
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A.
正确
B.
错误
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