1) Awareness of demand The demand arises from internal and external stimuli, including physical and psychological needs. Social and economic needs, etc. When one of these turns into a certain level, it becomes a stimulant to a person with a reaction. The way we respond to these boosts will rely on learning from past experiences.
正在翻譯中..
![](//zhcntimg.ilovetranslation.com/pic/loading_3.gif?v=b9814dd30c1d7c59_8619)