求一份口语对话材料。

Please design the situation of promoting with your parters at least 3 students a group according to the following information.
    Product presentaions are an important part of selling yuor product to prospective customers.In many cases,this will be the customer's first introduction to your company and potentially your prouct.First impressions are critial.There also times when it is importent to sell your product to the people inside your company as well as investors.Proper preparation is vital to presenting your product in the best light possible.The objective of the product presentation is different depending upon the target audience and the presentation should be adjusted accordingly. It is important to konw your audience and why they are interested enough to hear your presentation.