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<title>W3Cschool教程(w3cschool.cn)</title>
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p.ex1 {padding:2cm;}
p.ex2 {padding:0.5cm 3cm;}
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<p class="ex1">这段文字每边的内边距相等。两边的衬垫是2cm.</p>
<p class="ex2">该文本的上下padding为0.5cm，左右padding为3cm.</p>
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