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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>
- <style>
- .box{
- /* border:1px solid black; */
- /* 控制边框方向 */
- /* top 上边框 */
- /* right 右边框 */
- /* bottom 下边框 */
- /* left 左边框 */
- /* border-top: 1px solid red;
- border-right: 1px solid red; */
- border-bottom: 1px solid red;
- /* border-left: 1px solid red; */
- }
- </style>
- </head>
- <body>
- <div class="box">hello world</div>
- </body>
- </html>
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