单项选择题
A.Pp/Lr3B.Pp/Lr7/2C.Pp/Lr5/3D.Pp/Lr4
A.np/Lr1/6B.np/Lr3C.np/Lr2.5D.npLr
A.Pp/LrB.Pp/Lr3C.Pp/Lr2.5D.Pp/Lr2.0