初中物理教材中 ,压强和浮力是力学部分的重点和难点 ,特别是压强和浮力的综合计算 ,是物理中考难题的生长点之一。而通过大量的习题来培养学生的应试能力 ,往往事倍功半 ,效果不理想。本人在历年的初三教学中 ,通过一题多变一问多解的方式 ,培养学生灵活运用知识的能力 ,取得? In junior middle school physics textbooks, pressure and buoyancy are the key and difficult points of the mechanical part, especially the comprehensive calculation of pressure and buoyancy, which is one of the growing points of the physical examination problem. Through a large number of exercises to develop students’ test-taking abilities, they often do less effective and less effective. In the third grade of teaching in the past year, I have developed a variety of solutions to the problem and cultivate students’ ability to use knowledge flexibly.