在化学教学中,当讲到金属的晶体结构时,一般教科书上都用图1所示的模型来说明,但从这种模型的外形看不出图1a具有立方面心结构。我们制作了乒乓球的可拆开模型,主要的有两个:其一(图2)从外形上可明显看出有立方面心结构,拆开时,即可看到其中的密堆积层:其二(图3)从外形上看是明 In chemistry teaching, when talking about the crystal structure of metal, general textbooks use the model shown in Figure 1 to illustrate, but from the shape of this model does not see Figure 1a has an aspect structure. We have created a detachable model of table tennis, and there are two main ones: One of them (Figure 2) clearly shows the appearance of the core structure. When it is opened, the close-packed layers can be seen: The second (Figure 3) is clear from the appearance