醛糖的判断依据是D型、L型甘油醛 CHO CHO HO一c=H H-C-OH CH2OH CHOH L-甘油醛 D甘油醛 HO COH CH2OH CH2OH醛糖的判断依据是D型、L型甘油醛 • L-甘油醛 D-甘油醛