在风险管理中，( )是风险管理的第一步。
A．风险预测
B．风险归类
C．风险识别
D．风险逃避
参考答案：C
The doctor said jokingly that his own infection of the virus _______ the discovery of a vaccine (疫苗)of the disease.
A．stood for
B．called for
C．paid for
D．contributed to
绝缘层
