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【单选题】
在SQL Server 2008 中有多种约束,以下( )不属于SQL Server 2008 的约束A.
主键约束
B.
外键约束
C.
唯一性约束
D.
关联约束
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举一反三
【简答题】3 生态系统的概念是由英国植物生态学家A.G.Tansley 于___________________首次提出来的。
【简答题】锥度要从圆锥素线引出标注,锥度符号方向应与锥度的 一致。
【简答题】图样中标注斜度符号要与斜度方向( ),锥度符号的方向应与( )方向一致。
【简答题】在默认情况下,“报表设计器”中显示三个带区,即“页标头”、“ ”和“页注脚”
【单选题】Which of the following is not one of the three critical factors associated with the process of managing returned goods?
A.
why products are returned
B.
whether returned goods should be managed internally or outsourced to a third party
C.
how to optimize reverse logistics
D.
how many products are returned
【单选题】Why should we combine the medical people with the military? a) b) c)
A.
The military is able to move fast, do logistics and secure areas.
B.
The military has the training and is ready to go.
C.
The military is good at simulations in germ games.
【简答题】在默认情况下,“报表设计器”中显示三个带区,即页标头、 ______ 和页注脚。
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