The clear property only applies to block-level elements.
clear属性只能应用于块级元素。
The info tag can contain anything from text to large block-level elements.
info标签可以包含从文本到大型块级元素的任何内容。
As well as the structural elements, HTML 5 adds some purely semantic block-level elements.
除了结构性元素之外，HTML 5还增加了一些纯语义性的块级元素。
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