<!DOCTYPE html> <html> <head> <meta charset="utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>我是中國(guó)人</title> <style> /* box標(biāo)簽的所有后代li標(biāo)簽 */ .box li { background-color: red; } </style> </head> <body> <p>這是個(gè)段落標(biāo)簽</p> <h1>這是個(gè)標(biāo)題標(biāo)簽</h1> <div class="box"> <ul> <li>北京</li> <li>上海</li> <li>廣州</li> </ul> </div> </body> </html>
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