定量风险评估主要包括哪些方法？
参考答案：盈亏平衡分析
模拟
访谈
决策树分析
民族传统体育有哪几种分类？
---Will you join us to play basketball on Saturday afternoon?
---________, but I promised to go swimming with Eric.
A．Never mind
B．Many thanks
C．Take it easy
D．With pleasure
