死亡率在人身保险产品定价的主要假设之一。如果预定死亡率高于实际死亡率，则公司将发生（）。
A．利差损
B．死差损
C．利差益
D．死差益
参考答案：D
面瘫面部腧穴针刺宜用( )
A．补法B．泻法C．灸法D．平补平泻法
Most of the older civilizations which flourished during the fifth century B.C. are died out.
A．they have died out
B．has died out
C．have died out
D．they had died out
