单项选择题
A.0.006mLB.0.009mLC.0.011mLD.0.015mL
A.三角分布:u =aB.梯形分布:u=aC.两点分布:u =aD.反正弦分布:u =a
A.0.17mLB.0.24mLC.0.34mLD.0.48mL