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CSS选择器之唯一元素伪类:only-child示例 - 三十课

<title>三十课- CSS选择器之唯一元素伪类:only-child示例</title>. 6. <style>. 7. p:only-child {. 8. color: red;. 9. } 10. </style>. 11. </head>. 12. <body>.

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