编辑下面的代码:【加编码】
<html> <head> <style> h1.hidden {visibility:hidden;} </style> </head> <body> <h1>This is a visible heading</h1> <h1 class="hidden">This is a hidden heading</h1> <p>Notice that the hidden heading still takes up space.</p> </body> </html>
结果: 【此窗口】 帮助?
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