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<title>Fmpq教程(fmpq.com)</title>
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body {font-size:100%;}
h1 {font-size:2.5em;}
h2 {font-size:1.875em;}
p {font-size:0.875em;}
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<h1>This is heading 1</h1>
<h2>This is heading 2</h2>
<p>This is a paragraph.</p>
<p>在所有浏览器中,可以显示相同的文本大小,并允许所有浏览器缩放文本的大小。</p>
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