题目内容：
2．美国市场营销学家（ ）把各种市场营销要素归纳为四大类:即产品(product)、价格(price)、分销(place)、促销(promotion)。
参考答案：
选择题：2．美国市场营销学家（ ）把各种市场营销要素归纳为四大类:即产品(product)、价格(pric
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