风险管理的目的是( )。
A．控制风险
B．风险转移
C．控制风险事故发生的概率
D．避免或减少风险损失
参考答案：D
与直线x-y-4=0和圆x2+y2+2x-2y=0都相切的半径最小的圆的方程是（ ）
A．（x+1）2+（y+1）2=2
B．（x+1）2+（y+1）2=4
C．（x-1）2+（y+1）2=2
D．（x-1）2+（y+1）=4
A great number of people were killed in the big fire, and the number of the people who _____ missing _______still increasing.
A．were; was
B．are; is
C．were; is
D．are; was
