单项选择题
A.15.25% B.16.78% C.17.17% D.17.65% E.A、B、C、D均不正确
A.125 B.112 C.120 D.128 E.A、B、C、D都不正确
A.d(1+x)2 B.a(1+x) C.1+x D.ax E.A、B、C、D都不正确