在解答碳氢数目很多的较复杂的大分子烃时,学生们往往感到束手无策.其实这类大分子烃可以分为两大类型:一类是本身自成一系列,有单一的通式,运用等差数列可用通式法求解;另一类本身没有固定的通式,但可以看成是在一系列有通式的物质结构中再插入一些其它的基团,可用结构插入法求解. When answering the more complicated macromolecular hydrocarbons with a large number of hydrocarbons, students often feel helpless. In fact, these macromolecule hydrocarbons can be divided into two major types: one is a series of self-generated hydrocarbons, and the other is a single formula. Arithmetic equations can be solved by the general formula; the other class itself has no fixed formula, but it can be seen as inserting some other groups in a series of general structure of matter, which can be solved by the structure interpolation method.