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<title>W3Cschool教程(w3cschool.cn)</title>
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<p class="none">没有边框.</p>
<p class="dotted">一个点线边框.</p>
<p class="dashed">一个虚线边框.</p>
<p class="solid">一个实线边框.</p>
<p class="double">一个双线边框.</p>
<p class="groove">一个3D沟槽边框.</p>
<p class="ridge">一个3D脊边框.</p>
<p class="inset">一个3D嵌入边框.</p>
<p class="outset">一个3D突出边框.</p>
<p class="hidden">一个隐藏边框.</p>
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