单项选择题
A.单眼12cpm 双眼8cpmB.单眼8cpm 双眼12cpmC.单眼24cpm 双眼16cpmD.单眼16cpm 双眼24cpm
A.-0.25~-0.75B.+0.25~+0.75C.+0.25~-0.75D.-0.25~+0.75
A.13-0.25*年龄B.14-0.25*年龄C.15-0.25*年龄D.16-0.25*年龄