以不同的产品满足不同的市场需求的策略被称为（）
A.多角化策略
B.产品开发策略
C.市场开发策略
D.市场渗透策略
参考答案：A
--- Are your family ready for rafting?
---Yes, I really want my children to experience that they are young
A．\
B．while
C．unless
D．if
