找考题网-背景图
单项选择题

A.1997,(美),Gartner GroupB.1966,(美),Gartner GroupC.1977,……

顾客关系管理的实质的理论提出:()

A.1997,(美),Gartner Group
B.1966,(美),Gartner Group
C.1977,(美),Gartner Group
D.1997,(英),Gartner Group