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尝试:HTML 图片 - 尺寸属性或样式?
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<!DOCTYPE html> <html> <head> <style> /* This style sets the width of all images to 100%: */ img { width: 100%; } </style> </head> <body> <h2>Width/Height Attributes or Style?</h2> <p>The first image uses the width attribute (set to 128 pixels), but the style in the head section overrides it, and sets the width to 100%.</p> <img src="html5.gif" alt="HTML5 Icon" width="128" height="128"> <p>The second image uses the style attribute to set the width to 128 pixels, this will not be overridden by the style in the head section:</p> <img src="html5.gif" alt="HTML5 Icon" style="width:128px;height:128px;"> </body> </html>