水是由氢、氧两种元素组成的无机物,在常温常压下为无色无味的透明液体。水是地球上最常见的物质之一,是包括人类在内所有生命生存的重要资源,也是生物体最重要的组成部分。水在生命演化中起到了重要的作用。人类很早就水是由氢、氧两种元素组成的无机物,在常温常 Water is composed of hydrogen, oxygen two elements of inorganic substances, at room temperature and pressure for the colorless and odorless transparent liquid. Water is one of the most common substances on earth, an important resource for the survival of all life, including mankind, and the most important component of living organisms. Water plays an important role in the evolution of life. Human water has long been composed of hydrogen, oxygen two kinds of inorganic elements, at room temperature often