“物浸压变”是指物体浸入液体时,引起液体对容器底部的压力和压强的变化.这类试题具有知识密度大、难度较高、灵活性强、有较强的区分度等特点,因此经常出现在中考压轴题中,同学们一看到这类题,就感到头疼、束手无策 “Potential pressure change” refers to the change of pressure and pressure of the liquid to the bottom of the container when the object is immersed in liquid. Such questions have high knowledge density, high difficulty, strong flexibility, strong discrimination, etc. Characteristics, so often appear in the final exam questions, students feel headaches and helplessness when they see this kind of questions.