【判断题】( T )在关系型数据库中,一个数据表只能有一个主键,但可以有多个候选键。
【单选题】下列控件中,没有caption属性的控件是()。
【单选题】Chomsky defines ______ as the ideal user's knowledge of the rules of his language.
【单选题】下列没有 Caption 属性的控件是( )
【单选题】在数据库中创建一个表,对其主键叙述正确的是?
【单选题】数据库表中主键约束和唯一性约束的区别在于()
【简答题】Chomsky defines“competence” as the ideal user's () of the rules of his language.
【单选题】N. Chomsky defines as the ideal user's knowledge of the rules of his language.