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Suppose that each serving of Mac & Cheese costs $0.50 to make no matter how many servings are produced. This means that the price elasticity of supply for Mac & Cheese is _ and the supply curve is _.

Suppose that each serving of Mac & Cheese costs $0.50 to make no matter how many servings are produced. This means that the price elasticity of supply for Mac & Cheese is _ and the supply curve is _.
A.zero; perfectly elastic
B.infinite; perfectly elastic
C.infinite; perfectly inelastic
D.one; perfectly inelastic
正确答案：infinite; perfectly elastic

标签：微观经济学中国大学MOOC微观经济学

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Suppose that each serving of Mac &amp; Cheese costs $0.50 to make no matter how many servings are produced. This means that the price elasticity of supply for Mac &amp; Cheese is _ and the supply curve is _.

Suppose that each serving of Mac & Cheese costs $0.50 to make no matter how many servings are produced. This means that the price elasticity of supply for Mac & Cheese is _ and the supply curve is _.