[类别与模板的关系](%E7%B1%BB%E5%88%AB%E4%B8%8E%E6%A8%A1%E6%9D%BF%E7%9A%84%E5%85%B3%E7%B3%BB.md) [模板的选择与使用](%E6%A8%A1%E6%9D%BF%E7%9A%84%E9%80%89%E6%8B%A9%E4%B8%8E%E4%BD%BF%E7%94%A8.md) [内嵌元素的作用](%E5%86%85%E5%B5%8C%E5%85%83%E7%B4%A0%E7%9A%84%E4%BD%9C%E7%94%A8.md)