说到晶体,其实我们并不陌生,生活中常见的水晶、食盐、蔗糖、雪花、维生素C都是晶体。有的晶体较大,肉眼可见;有的则较小,要在放大镜或显微镜下才能看见。在我们的科学课本中,就指导大家用显微镜观察过食盐、蔗糖、碱面、味精四种晶体的颗粒形状。我们会发现,这四种晶体颗粒的形状各不相同,但同种物质的颗粒都有大致相同而且规则的几何形状。所以,在有些人的印象里,仿佛晶体就 Speaking of crystals, in fact, we are no stranger to life, common crystal, salt, sugar, snow, vitamin C are crystal. Some crystals larger, visible to the naked eye; others smaller, to be seen under a magnifying glass or a microscope. In our science textbooks, we instruct you to observe the particle shape of the four kinds of crystals of salt, sucrose, alkali, and MSG with a microscope. We will find that the four crystal particles vary in shape, but the particles of the same species have roughly the same regular geometry. So, in some people’s impression, as if on the crystal