学生的教材勿庸置疑,它是由教育专家们精心编写而成的前人丰富经验的综合。但由于编写教材受人员、地区、环境等条件的影响,它不可能是放之四海而皆准的“万能”书。在我们的实际教学中,受学生情况、教师素质、当地实际等因素 Students no doubt that the teaching materials, it is well-prepared by education experts made a wealth of experience combined. However, due to the preparation of teaching materials by the personnel, the region, the environment and other conditions, it can not be universal “universal” book. In our actual teaching, by the student situation, the quality of teachers, local and other factors