实验材料:盘子1个、牙签若干、注射器(吸管也可以)、颜料、水、玻璃杯。实验步骤:1.将牙签轻轻对折,但不要将它们折断。再将折好的牙签放在盘子的中心,边边相靠。2.为了便于观察实验效果,可在水中加入颜料,用注射器吸取加有颜料的水。3.慢慢地将颜料水滴在牙签的中心,牙签中间的夹角开始变大。 Experimental materials: a plate, a number of toothpicks, syringes (straw can), paint, water, glass. Experimental steps: 1. The toothpicks gently fold, but do not break them. Tucked toothpicks and then folded in the center of the plate, rely on the side. 2. In order to facilitate the observation of experimental results, you can add pigment in the water, using a syringe sucked pigmented water. 3. Slowly paint the water droplets in the center of the toothpick and the angle between the toothpicks begins to increase.