题目内容：
是由生产商、批发商和零售商形成的统一整体，其可由生产商，也可由批发商或零售商控制。它们依靠经营规模、讨价还价的能力及消除重复服务来达到经济节约的目的。
参考答案：
选择题：是由生产商、批发商和零售商形成的统一整体，其可由生产商，也可由批发商或零售商控制。它们依靠经营规模、
- 题目分类：国家开放大学—管理学基础
- 题目类型：选择题
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