html嵌入html后无法完全显示，并且加载CSS失败_html/css_WEB-ITnose

<link rel="stylesheet" href="./default.css" type="text/css">

<iframe name="content_frame" marginwidth=0 marginheight=0 width=100%  src="./head.html" frameborder="0"  scrolling="no" ></iframe> 

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