说到压力，很容易会想到重力，为什么呢？压力与重力有关，物体由于受重力作用，会对支承面产生压力，在特殊情况下，压力的大小就等于重力的大小．例如，茶杯放在水平桌面上，对桌面的压力，就是由茶杯受到的重力产生的，且二者大小相等；液体装在柱形容器上，对容器底的压力 When it comes to stress, it is easy to think of gravity. Why? The pressure is related to the gravity, and the object will exert pressure on the bearing surface due to gravity. Under special circumstances, the pressure is equal to the gravity. For example, the teacup is placed on a horizontal tabletop, and the pressure on the tabletop is generated by the gravity of the teacup, and the two are equal in size; the liquid is loaded on the columnar container, and the pressure on the bottom of the container is