在实际教学过程中,笔者发现,八年级、九年级的学生学习物理教材后,通过考查检验,对基础知识和基本技能的掌握往往不尽如人意。这主要表现在以下四个方面:一、联系生活实际不够例:如图所示,8个相同的水瓶中灌入不同高度的水,向瓶中吹气,可以发出“1、2、3、4、5、6、7、?1”的声音来。这些声音产生的原因和决定音调的因素分别是 In the actual teaching process, I found that eighth grade, ninth grade students after learning physics textbooks, through test examination, the mastery of basic knowledge and basic skills are often unsatisfactory. This is mainly manifested in the following four aspects: First, the contact life is not real enough cases: as shown in the figure, the same eight bottles filled with different levels of water, blowing to the bottle, you can issue , 4, 5, 6, 7, 1 "sounds. The reason for these sounds and the factors that determine the pitch are, respectively