单项选择题
A.18(含)-60周岁 B.18-60(含)周岁 C.22(含)-55周岁 D.22-55(含)周岁
A.1.78% B.2.68% C.1.76% D.2.56%
A.6期,月均收入4.5倍 B.12期,月均收入9.5倍 C.18期,月均收入17倍 D.24期,月均收入20倍