浮力这章篇幅不长，但涉及到的力学物理量多，内容上既有感性的认识，又涉及到理性的思维（如物体受力分析，力与运动关系等）．这章对基本知识与能力的要求都比较高，因此学生学习起来感到较为吃力，处理问题常常感到无从下手．虽出题形式多变，考查范围广，但大多数问周的解 The buoyancy chapter is not long, but it involves a lot of mechanical physics, both emotional perception and rational thinking (such as force analysis, force and movement, etc.). This chapter has a relatively high requirement for basic knowledge and ability. Therefore, students are more struggling to learn and often feel that they cannot handle the problem. Although there are many variations in the format of the questions, the scope of examination is broad, but most of the questions are solved