单项选择题
A.-3.00DS/-0.75DC*90B.+3.00DS/-0.75DC*180C.-0.75DC*70+0.50DC*160D.-0.75DS/-1.25DC*80
A.1~2mmB.2~3mmC.2.5~4mmD.4~6mm
A.40%B.50%C.60%D.70%