They have the same effect on normal web browser rendering engines, but there is a fundamental difference between them. As the author writes in a discussion list post: Think of three different. Both of them emphasize text. Tag shows text as italics, whereas <strong> Is this the only difference? I heard you should define sizes and distances in your stylesheet with em instead of in pixels. So the question is why should i use em instead of px when defining styles in css? Em has the purpose of giving em phasis to the content. The 'em' is a very useful unit in css, since it can adapt automatically to the font that the reader uses an em is relative to the current element it is defined on.
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If you use relative. 即为此表情，代码为 [em]e3006 [/em] 1、当发送或接收出现问题时，表情可能显示为代码。 2、此表情适用范围仅限于 qq空间 中的留言板，聊天窗口无法显示。 3、此表情显示的画面是一个.
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