A．
B．
C．
D．
答案：B
风险管理的三要素是风险分析，风险评价和（）。
A.频率分析
B.风险估计
C.后果估计
D.风险控制
Which of the following most accurately describes a market structure that has one seller of a specific, well-defined product that has no good substitutes（）
A. Oligopoly.
B. Monopoly.
C. Monopolistic competition.
