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</ul> </div> </div> </nav> <article id="readercontainer"> <div class="container"> <div class="side-widget sticky-top"> <div class="vote post-left ut-pt20"> <i class=" iconfont toggle-supports oo-vote-up " data-type="blog" data-num="0" data-id="3201" data-enable="" title="推荐"><span class="vote-count" data-num="0">0</span></i> <button type="button" id="favorites" data-type="blog" data-id="3201" data-title="html文档头对css影响" class="toggle-favorites btn btn-outline-secondary " title="收藏"><i class="fa fa-bookmark-o" aria-hidden="true"></i></button> <div class="bdsharebuttonbox ut-mt10"> <a href="#" class="bds_qzone" data-cmd="qzone" title="分享到QQ空间"></a> <a href="#" class="bds_tsina" data-cmd="tsina" title="分享到新浪微博"></a> <a href="#" class="bds_tqq" data-cmd="tqq" title="分享到腾讯微博"></a> <a href="#" class="bds_weixin" data-cmd="weixin" title="分享到微信"></a> </div> </div> </div> <div class="row ut-mt20"> <div class="col-md-9 article-body border-right"> <h1 class="headTit text-center">html文档头对css影响</h1> <div class="aut"> <a class="pop" data-avatar="https://simg.open-open.com/show/7b6e25d28c4e75f7a76f2cf9041ff793.jpg" data-avatar="https://simg.open-open.com/show/7b6e25d28c4e75f7a76f2cf9041ff793.jpg" data-name="" data-id="12839" href="https://user.open-open.com/u/12839"><i class="fa fa-user-o" aria-hidden="true"></i> </a> <span title=" 2011-03-04 08:16:15"> 13年前</span> </div> <div data-spy="scroll" data-target="#article-navbar" data-offset="0"> <DIV>最近开发中,遇到一个问题。body{font-size:12px}对<td></td>内文字不起作用。html文件的完整格式如下</DIV> <DIV><!-- <BR><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"<BR>"<a href="/misc/goto?guid=4959615501594206660" target="_blank">http://www.w3.org/TR/html4/loose.dtd</A>"><BR> --><BR><html><BR> <head><BR>  <title>font size test</title><BR>  <meta http-equiv="keywords" content="enter,your,keywords,here" /><BR>  <meta http-equiv="description" content="A short description of this page." /><BR>  <meta http-equiv="content-type" content="text/html; charset=UTF-8" /><BR>  <!-- <BR>  <style type="text/css"><BR>  body{<BR>    font-size:48px;<BR>    /*对td内元素无效,如果无html <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"<BR>                                    "<a href="/misc/goto?guid=4959615501594206660" target="_blank">http://www.w3.org/TR/html4/loose.dtd</A>"><BR>          */<BR>  }<BR>  </style><BR>   --><BR>   <link rel="stylesheet" href="font.css" type="text/css"/><BR> </head><BR> <body><BR>  <p><BR>   p元素内文字<BR>  </p><BR>  <hr/><BR>  <table><BR>    <tr><BR>      <td>td内文字</td><BR>    </tr><BR>  </table><BR> </body><BR></html></DIV> <DIV>允许效果如下<IMG id=uchomelocalimg[] src="attachment/201103/4/12839_12992445736wjD.png"></DIV> <DIV>去掉文件头注释后</DIV> <DIV><BR><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"<BR>"<a href="/misc/goto?guid=4959615501594206660" target="_blank">http://www.w3.org/TR/html4/loose.dtd</A>"><BR><html><BR> <head><BR>  <title>font size test</title><BR>  <meta http-equiv="keywords" content="enter,your,keywords,here" /><BR>  <meta http-equiv="description" content="A short description of this page." /><BR>  <meta http-equiv="content-type" content="text/html; charset=UTF-8" /><BR>  <!-- <BR>  <style type="text/css"><BR>  body{<BR>    font-size:48px;<BR>    /*对td内元素无效,如果无html <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"<BR>                                    "<a href="/misc/goto?guid=4959615501594206660" target="_blank">http://www.w3.org/TR/html4/loose.dtd</A>"><BR>          */<BR>  }<BR>  </style><BR>   --><BR>   <link rel="stylesheet" href="font.css" type="text/css"/><BR> </head><BR> <body><BR>  <p><BR>   p元素内文字<BR>  </p><BR>  <hr/><BR>  <table><BR>    <tr><BR>      <td>td内文字</td><BR>    </tr><BR>  </table><BR> </body><BR></html></DIV> <DIV>允许效果<IMG id=_uchome_localimg_1 src=""></DIV> <DIV>不带文件头时浏览器是怎么解析html文档的呢?</DIV><div class="uchome-message-pic"><img src="attachment/201103/4/12839_1299244574ge1H.png"><p></p></div> </div> </div> <div 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