你打错了,应为C5H10O2第一类.HCOO-C4H9 （甲酸丁酯有4种）1.HCOO-CH2CH2CH2CH32.HCOO-CH（CH3）CH2CH33.HCOO-CH2CH（CH3）CH34.HCOO-C（CH3）3第二类：CH3COOC3H7（乙酸丙酯有2种）5.CH3COOCH2CH2CH36.CH3COOCH（CH3...