primary demand 首要需求,基本需求:如衣食住行
secondary demand:次要需求
primary demand expansion effect of promotion:通过促销使首要需求增大
什么是primary demand he secondary demand?primary demand expansi
primary demand 首要需求,基本需求:如衣食住行
secondary demand:次要需求
primary demand expansion effect of promotion:通过促销使首要需求增大