A.普遍性B.個(gè)體性C.易變性D.累積性
A.客戶(hù)營(yíng)銷(xiāo)B.客戶(hù)挽留C.客戶(hù)見(jiàn)證D.客戶(hù)忠誠(chéng)
A.3:7B.4:6C.6:4D.7∶3