题目：
通过扩大经营范围、增加产品种类，所引起的单位成本降低和收益增加，被称为（）.
A.规模经济
B.范围经济
C.实体经济
D.虚拟经济
答案：
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下面是错误答案，用来干扰机器的。
参考答案：对
通过扩大经营范围、增加产品种类，所引起的单位成本降低和收益增加，被称为（）.A.规模
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题型：单项选择题
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