线性常系数微分方程表示的系统,方程的齐次解称之____,特解称之____。
[单选]Which of the following statements is correct?
A. Both a competitive firm and a monopolist are price takers.
Both a competitive firm and a monopolist are price makers.
C. A competitive firm is a price taker, whereas a monopolist is a price maker.
D. A competitive firm is a price maker, whereas a monopolist is a price taker.
[单选]A monopoly market is characterized by
A. many buyers and sellers.
B. “natural” products.
C. barriers to entry.
D. a Nash equilibrium.
[单选]Which of the following would be most likely to have monopoly power?
A. a national florist
B. an online bookstore
C. a local restaurant
D. a local electrical cooperative
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