各省考试说明中明确要求:能判断并正确书写简单同分异构体的结构简式。从各省的高考试卷中也可发现限制条件下书写同分异构体的结构简式的考查已成为热点命题。现统计部分省份近四年考查分值情况(见 The provincial examinations clearly specify the requirements: to judge and correctly write the simple structure of simple isomers. From the provincial college entrance examination papers can also be found under the conditions of writing isomers of the structure of the brief examination has become a hot topic. Some statistics are now part of the provinces test scores in the past four years (see