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恰当地选择中间量,使它跟已知量和所求量都相联系,用它来搭桥牵线,可将问题简单化如图1所示,将容器内装入水后,放入水平桌面上,容器底部受到的压力为F,桌面受到的压力为
The intermediate quantity is appropriately selected so that it is associated with both the known quantity and the demanded quantity. Using it to bridge the line can simplify the problem. As shown in Fig. 1, the container is filled with water and placed on a horizontal table. The pressure on the bottom is F, and the pressure on the desktop is