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<html> <head> <title>边框属性 border</title> <style type="text/css"> .d1 {border:5px solid gray;} </style> </head> <body> <div class= "d1">这个div的边框属性:边框宽度(border-width)为5px;边框风格(border-style)为直线式;边框颜色为灰色。</div> </body> </html>