编制寿命表时,死亡概率的计算公式为

A、[img=~/QImg/2013-10-14-11-12-39/image050.jpg]
B、[img=~/QImg/2013-10-14-11-12-39/image051.jpg]
C、[img=~/QImg/2013-10-14-11-12-39/image052.jpg]
D、[img=~/QImg/2013-10-14-11-12-39/image053.jpg]
E、以上均不对