单项选择题
A.风险因素B.风险事故C.风险损失D.风险收益
A.4% B.4.04% C.6% D.5%
A.20% B.14% C.16.13% D.15.13%
A.2.5436 B.2.4868 C.2.855 D.2.4342
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