为使学生认识分子的真实存在,并在不停地运动着,我们做了以下的实验。一、氨的分子运动在一长条滤纸上,每一厘米滴一小滴无色酚酞试液,将滤纸装入大试管中,将滴有酚酞滤纸的正面向着学生,竖放着(如图1) 。再用一小团滴有数滴氨水的脱脂棉塞住试管口。就可观察到试管中离脱脂棉最近的第一个试液 In order to make students understand the true existence of the molecules and keep moving, we have done the following experiments. First, the molecular movement of ammonia on a long piece of filter paper, a small drop of colorless phenolphthalein test solution per centimeter, the filter paper into a large test tube, the front of the phenolphthalein filter paper drops to the students, vertical (as shown 1) . Then plug the test tube mouth with a small volume of absorbent cotton with a few drops of ammonia. The first test solution closest to the absorbent cotton in the test tube can be observed