The second part, the author introduce the common risk, conception of the common risk, the estimate model of risk, the means of apron string .
第二章引入了一般风险的问题，包括风险的基本概念，评价模型和控制方法；
The second part, the author introduce the common risk, conception of the common risk, the estimate model of risk, the means of apron string .
第二章引入了一般风险的问题，包括风险的基本概念，评价模型和控制方法；
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