单项选择题
A.E(5s)>E(4F.>E(4s)>E(3D. B.E(4s)>E(3D.>E(3p)>E(3s) C.E(4s)>E(3s)>E(2s)>E(1s) D.E(5s)>E(4s)>E(4F.>E(3D.