现行的“八五规划职高教材”是职高师生教学活动的依据,其特点是简明扼要,有利于教学。教材上的习题是检查对课本知识掌握好坏的良好尺度。若对课本习题进行开拓引申,不仅能沟通知识间的内在联系,开阔学生的解题思路,使学生的思维活动始终处于一种由浅入深, The current “Eighth Plan Senior Vocational Education Textbook” is the basis for vocational teaching activities, which is characterized by concise, is conducive to teaching. Exercises on the textbook is to check good knowledge of the textbook good or bad scale. If the textbook exercises to develop and extend, not only can communicate the internal relations between knowledge, open up the students 'problem-solving ideas, so that students' thinking activities are always in a shallow,