A.9g/LNaCl溶液 B.10g/L葡萄糖溶液 C.15g/LNaCl溶液 D.5g/LNaCl溶液
A.麥芽糖 B.果糖 C.蔗糖 D.葡萄糖
A.CH3CH2CH(CH3)COOH B.HOOC-CH2CH2-COOH C.CH3-CH(OH)-COOH D.HOOC-CH2-COOH