有个学生向我提出了这样的问题：一杯热水、一杯等质量的凉水，在相同的条件下，哪杯水先结冰？ 师：答案是显然的，凉水先结冰． 生：我从小学就听说热水先结冰，后来在课外读物上也看到过，并说得头头是道．从初中到高中我问过几位物理老师，也说热水先结冰，并作出了解释． One student asked this question to me: A cup of hot water, a cup of cold water of the same quality, under the same conditions, which glass of water is frozen first? Teacher: The answer is obvious. The cold water freezes first. Student: I heard from the elementary school that hot water was frozen first, and I also saw it on extracurricular reading materials. I asked several physics teachers from junior high school to high school. I also said that the hot water was frozen and explained.