完全垄断,又称纯粹垄断,是同完全竞争相对的另一个极端的市场结构。指一家厂商控制了某种产品全部市场供给的市场结构,或者说是只有一个买者的市场。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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