若正常成人的血铅含量近似服从对数正态分布。拟用300名正常人血铅值确定95%参考值范围,最好采用(其中γ

A、[img=~/QImg/2013-10-14-10-46-38/image054.jpg]
B、[img=~/QImg/2013-10-14-10-46-38/image055.jpg]
C、[img=~/QImg/2013-10-14-10-46-38/image056.jpg]
D、[img=~/QImg/2013-10-14-10-46-38/image057.jpg]
E、[img=~/QImg/2013-10-14-10-46-38/image058.jpg]