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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0">
- <title>Document</title>
- <!-- css 需要写在style标签中 -->
- <style>
- /* css 选择器 */
- /* 标签选择器 */
- h1{
- color:red;
- }
- </style>
- </head>
- <body>
- <h1>hello world</h1>
- </body>
- </html>
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