文章对圆柱形水龙头竖直向下流出的水柱形状作了深入探讨,给出了其截面面积公式和母线方程.另一方面,文章还初步探讨了这类问题对学生认知发展的意义. In this paper, the shape of water column flowing vertically downwards through a cylindrical faucet is discussed in depth, and its formula of cross-sectional area and busbar equation are given.On the other hand, the article also tentatively discusses the significance of such problems to students’ cognitive development.