一、引言众所周知,纯水异予所有其他液体,声速在其中有温度极大值,而压缩系数则有相应的极小值。水压缩系数的温度极小值是其结构特征的直接表现。关于水结构的现代观点认为,水是两种结构,即冰型结构与密集型结构的“混合体”。随着温度的升高,一方 I. INTRODUCTION It is well-known that pure water is the best solution for all liquids and the sound velocity has the maximum temperature, while the compressibility has the corresponding minimum value. The minimum temperature of the water compressibility coefficient is a direct manifestation of its structural characteristics. The modern view of water structure suggests that water is a mixture of two structures, an ice structure and an intense structure. As the temperature rises, one side