咨询机构是行政组织机构之一,是现代决策机制不可或缺的重要组成部分,下列属于其基本职能的有()。
A.信息传递
B.参谋咨询
C.协调政策
D.调查预测
参考答案:B, C, D
According to the characteristics of the capital market, which of the following is most directly a function of primary capital markets and which is most directly a function of secondary capital markets Primary capital marketsSecondary Capital markets()①A. Source of liquidity Security underwriting ②B. Source of new capital Source of price information ③C. Source of price information Source of new capital
A. ①
B. ②
C. ③
设两个关系C和SC如下,它们的主键分别为C#和(S#,C#),在关系SC中除属性GRADE 数据类型是整型且允许空值外,其他属性的数据类型都是字符型。若要向关系SC执行插入操作,下面出的4个元组中哪一个元组可以被插入