一杯温水,保持温度不变,另有一杯冷水,一杯热水。先将手放在冷水中,再放到温水中,会感到温水热;先将手放在热水中,再放到温水中,会感到温水凉。同一杯温水,出现了两种不同的感觉,这就是冷热水效应。这种现象的出现,是因为人人心里都有一杆秤,只不过是秤砣并不一致,也不固定。随着心理的变化,秤砣也在变化。当秤砣变小时,它所称出的物体重量就大,当秤砣变大时,它所称 A cup of warm water, keep the temperature unchanged, another cup of cold water, a cup of hot water. First hand on cold water, and then put in warm water, will feel warm water; first hand on hot water, then put in warm water, will feel warm and cold. The same cup of warm water, there have been two different feelings, which is hot and cold water effect. This phenomenon occurs because everyone has a balance in the heart, but the scale is not consistent, nor fixed. As psychological changes, scales are also changing. When the scale 砣 becomes smaller, it claims that the weight of the object is large, and when the scale 砣 becomes larger, it says