分子组成里既含有醇羟基又含有羧基的有机物称为羟基酸,依据分子里羟基的位置不同,羟基酸可分为α-羟基酸(如β-羟基酸(如γ-羟基酸(:如等,由于羟基酸分子中含有醇羟基和羧基两种官能团,因而羟基酸既具有醇的性质又具有羧酸的性质,对羟基酸的考查,不但能够考查学生对基础知识的掌握情况,而且还能考查学生的逻辑推断能力和创造性思维能力. Organic compounds containing both alcoholic hydroxyl groups and carboxyl groups in the molecular composition are called hydroxy acids. According to the position of the hydroxyl groups in the molecule, the hydroxy acid can be divided into α-hydroxy acids (such as β-hydroxy acids (such as γ-hydroxy acids): Because hydroxy acid molecules contain alcohol hydroxyl and carboxyl functional groups, the hydroxy acid has both alcohol and carboxylic acid properties. The examination of hydroxy acid can not only test students’ knowledge of basic knowledge, but also Examine students’ logical inference ability and creative thinking ability.