单项选择题
A.n-2B.n-1C.nD.n+1E.n+2
A.6.18×10-5,1.0874B.6.18×10-4,1.0874C.6.18×10-3,1.0874D.6.18×10-5,0.1087E.6.18×10-4,0.1087
A.111.5,138.5B.112.8,137.5C.112.5,138.5D.113.5,138.5E.111.5,137.5