利用海波代替萘做晶体熔化实验，避免了禁蒸气对师生健康的影响．由于海波不是常见物质，一般中学制备并不容易．霜是水的晶体，制备比较容易，用它来代替海波做晶体熔化实验效果也很好．实验的方法是：将从冰箱冷冻室得到的软霜约20克迅速加入一预先放有温度计的试管内，调整 The use of sea waves instead of naphthalene crystal melting experiments to avoid the impact of prohibited vapor on the health of teachers and students. As the sea wave is not a common material, the general preparation is not easy. Cream is water crystal, preparation is relatively easy, use it instead of sea wave to do the crystal melting experiment effect is also very good. The experimental method is: about 20 grams of soft cream obtained from the freezer of the refrigerator is rapidly added to a test tube pre-placed in a thermometer, and adjusted