在生物学教学中 ,笔者发现课本里出现了不同数据的描述。这对教师教学、学生准确掌握这些定量性知识造成困难。数据的采用应坚持准确性通用性原则。例如 ,对细胞中化学成分的说明 ,1996年人教版高中《生物》(必修 )教材、有这样的叙述 :Ｃ、Ｈ、Ｏ、Ｎ、Ｐ、Ｓ六种元素大约占原 In biology teaching, the author finds that there are different data descriptions in the textbook. This makes it difficult for teachers to teach and students to accurately grasp these quantitative knowledge. The adoption of data should adhere to the principle of accuracy and versatility. For example, for the explanation of the chemical composition in cells, in 1996 the PEP “Biology” (required) teaching material had such a narrative: The six elements of C, H, O, N, P, and S account for approximately