题目内容：
[填空题,2.5分] 既有非排它性又有非竞争性的物品称为 。
参考答案：
选择题：[填空题,2.5分] 既有非排它性又有非竞争性的物品称为 。
- 题目分类：郑州科技学院-工商企业管理-经济学基础
- 题目类型：选择题
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电缆的稳定由厂家保证，选择电缆时可以不必考虑。
己知随机变量X服从二项分布B(n, p), 则( )(A)E(2X-1)=2np(B)E(2X
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The teacher seldom let an opportunity to teach his
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