color involves the mixing of colored lights. A: Additive B: Subtractive C: Transparent D: Polychrome

subtractive color mode refers to A: CMYK mode B: RGB mode C: HSB mode D: LAB mode

反映角膜表面每个点真实角膜曲率的图是 A: axial power B: tangential power C: refrative map D: elevation E: subtractive map