代码编辑器:
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<meta charset="utf-8">
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<link href="/static/next/css/tryit.css?v=2017082407" rel="stylesheet"/>
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<style>
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div
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{
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border:2px solid;
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padding:10px;
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background:#dddddd;
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border-top-left-radius:2em;
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border-top-left-radius:2em; /* Safari */
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}
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</style>
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<div> border-top-left-radius 属性允许添加 一个圆角到左上角.</div>
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<footer>简单教程,简单编程<br/>Copyright © 简单教程 www.twle.cn</footer>
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