根据《统计法》的规定,统计的职能是指( )。
A.信息、咨询和监督
B.提供统计资料和统计咨询意见
C.实行统计监督
D.开展统计调查
参考答案:A
Bob Geldof, who organized Live Aid, ______ to raise money for the famine and it ______ to be a great success.
A.intended; turned out
B.tried; turned over
C.hoped; turned in
D.wished; turned up
关系代数是以集合代数为基础发展起来的,它是一种关系操纵语言,它的操作对象和操作结果都是______。