以死亡作为保险责任的寿险，由于实际死亡率小于预定死亡率而产生的利益，称为______。
A．利差益 B．死差益 C．费差益 D．退保收益
参考答案：B
. They gave us so warm a welcome that we were moved very much. It was a sight__________ we__________.
A．what;have never forgotten
B．which; wre never forgotten
C．as ;will never forget
D．that; would never forget
下面命令属于三维实体编辑的是：（）
A.Mirror3d（ROTATE3D）
B.Align
C、Array
D、Extrude
