烃类是有机化学基础中的基础,是历届高考的重要载体之一.其中烃类含碳量或含氢量的有关定量关系更是高考命题的重点,下面选取课本中的习题或者某一个典型题进行分析,然后以变式的形式对其进行多方面的分析,找出其常见的命题方式,最后总结出解题规律及方法. Hydrocarbons are the basis of organic chemistry, is one of the important carrier of the previous college entrance examination .Carbon content or hydrogen content of the quantitative relationship is the focus of the college entrance examination proposition, the following textbook selected exercises or a typical Problem analysis, and then in the form of variants of its multi-faceted analysis to find out its common propositions, and finally summed up the problem-solving rules and methods.