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【单选题】
下列选项中属于规律的一组是 ( )A.
①月亮绕地球转 ②新陈代谢 ⑨市场商品的价格时落
B.
③大雁冬天南飞春天北来 ④生物体的自然选择，适者生存 ⑧苹果落地
C.
⑦生产关系一定要适应生产力状况 ⑧苹果落地 ⑩水往低处流
D.
②新陈代谢 ④生物体的自然选择，适者生存 ⑥商品以价值量为基础实行等价交换 ⑦生产关系一定要适应生产力状况
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【单选题】A monopolist faces a constant marginal cost of $1 per unit. If at the price he is charging,the price elasticity of demand for the monopolist's output is -0.5, then:
A.
the price he is charging must be 2.
B.
the price he is charging must exceed 2.
C.
the price he is charging must be less than 2.
D.
the monopolist can not be maximizing profits.
【单选题】monopolist faces a constant marginal cost of $1 per unit. If at the price he is charging,the price elasticity of demand for the monopolist's output is -0.5, then:
A.
the price he is charging must be 2.
B.
the price he is charging must exceed 2.
C.
the price he is charging must be less than 2.
D.
the monopolist can not be maximizing profits.
【判断题】If an upstream monopolist sells to a downstream monopolist, the price to consumers will be higher than the competitive price, but not so high as it would be if the downstream monopolist took control o...
A.
正确
B.
错误
【简答题】综合评价指标体系包括多个层次设立的指标，指标的设立要与目标所处的层次相关。这体现了评价指标的设立应遵循（ ）原则。
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