A、give
B、cover
C、take
D、clean
1.通常情况,SQL Server 2005主要支持PRIMARY约束、UNIQUE约束、CHECK约束、DEFAULT约束、FOREIGN约束。( )在定义列时,它可以为表中的指定列提供默认值。A.FOREIGN约束B.DEFAULT约束C.UNIQUE约束D.CHECK
2.Examine the following options, Multicasting supports applications that communicate.()A. many - to - oneB. one - to - oneC. one - to - manyD. many - to - many
3.These animals migrate south annually in search of food.A:.travelB: exploreC: inhabitD: prefer
4.()在定义列时,它可以为表中的指定列提供默认值。A.FOREIGN约束B.DEFAULT约束C.UNIQUE约束D.CHECK
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