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初中义务教育《生物》第二册［实验三］鉴定骨的成分的实验目的是“知道骨的成分和物理特性”。初二学生不知道有机物和无机物与哪些物质反应，因而教材中对于结论的解释显得过于简单和生硬。如按教材中的实验步骤进行操作和解释，将达不到“大纲”对本实验的要求，也难以培养?
Junior High School Compulsory Education “Biology” Volume II [Experiment 3] The purpose of the experiment to identify the components of bone is to “know the composition and physical characteristics of the bone.” The second grade students did not know what organic matter and inorganic matter reacted to, and the interpretation of the conclusions in the textbook was too simple and rigid. If you follow the experimental procedures in the textbook, you will not be able to meet the requirements of the “Outline” for this experiment.