Which of the following is not a characteristic of a perfectly competitive market（）
A. Firms are price takers
B. Firms have difficulty entering the market
C. There are many sellers in the market
D. Goods offered for sale are largely the same
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For any competitive market, the supply curve is closely related to the（）
A. preferences of consumers who purchase products in that market
B. income tax rates of consumers in that market
C. firms’ costs of production in that market
D. interest rates on government bonds
Which of the following is a characteristic of a competitive market（）
A. There are many buyers but few sellers
B. Firms sell differentiated products
C. There are many barriers to entry
D. Buyers and sellers are price takers
When buyers in a competitive market take the selling price as given, they are said to be（）
A. market entrants
B. monopolists
C. free riders
D. price takers
The provision of public goods gives rise to（）
A. no externalities
B. positive externalities
C. negative externalities
D. rivalries in consumption
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