刘同学2019-10-28 22:08:23
刘同学Which of the following is the correct description of market equilibrium? A The demand curve is negatively sloped and the supply curve is positively sloped. B For any given pair of market demand and supply curves, only one equilibrium point can exist. C The difference between quantity demanded and quantity supplied is zero. 听不见，麻烦解释A为啥不对
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Sophie2019-10-29 17:47:39
Sophie同学你好，
A可以举个反例，demand curve 不一定是斜率为负，可能斜率是水平的，比如说完全竞争市场对于单个厂商的需求曲线
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