1、图形
2、代码
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title></title> <style> .d{ width:0px; height:100px; border-left:25px solid; border-top:25px solid transparent; border-bottom:25px solid transparent; } </style> </head> <body> <div class="d"></div> </body> </html>