从1里每次减去 ，减去请选择ABC;A(D:A*E2E3A+O8x,o,J,^;p1P5W'S3U次得0.;n;F;j3@9a)G3s6~6A8X4?0L(\(]7Q
A. 10;n;F;j3@9a)G3s6~6A8X4?0L(\(]7Q
B.5;n;F;j3@9a)G3s6~6A8X4?0L(\(]7Q
C.50;n;F;j3@9a)G3s6~6A8X4?0L(\(]7Q