Which of the following is a characteristic of perfect competition?
A. a. A single seller.
B. b. A small number of buyers.
C. c. Buyers and sellers are price setters.
D. d. Buyers and sellers are price takers.
查看答案
A decrease in the price of pizza will
A. a. decrease the quantity of pizza demanded.
B. b. increase the quantity of pizza demanded.
C. c. decrease the demand for pizza.
D. d. increase the demand for pizza.
When income increases, purchases of houses increase. This means
A. a. the demand curve for housing has shifted rightward.
B. b. there has been a movement down the demand curve for housing.
C. c. the demand curve for housing has shifted leftward.
D. d. there has been a movement up the demand curve for housing.
选择合适的字填空。园 元 圆花（ ）______ （ ）旦______ （ ）桌______
（ ），凌寒独自开。______ 白日依山尽，（ ）。______
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