上海初中物理学业考试中,柱形压强变化问题是中考的重点和难点,涉及密度、压强和浮力等知识点难度大,需要有较好的数学学科知识和技巧结合起来灵活应用,学生的失分点高,并且随着教学和学业考试改革的不断深入,这类题型越发提升了其难度,用数学列式的分析方法越发显得 Shanghai Junior High School Physics Exams, column pressure changes is the focus and difficulty of the exam, involving knowledge of density, pressure and buoyancy point difficult, the need for better mathematical knowledge and skills combined with the flexible application of the student’s loss Point high, and with the deepening reform of teaching and academic exams, these types of questions to enhance the difficulty of more and more, with the mathematical analysis of column-based methods become more apparent