You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <alllinks galcontinue="Shell脚本容易写错的几个语法|55" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="0" title="首页" />
      <page pageid="22" ns="0" title="WIKI教程" />
      <page pageid="40" ns="0" title="MySQL" />
      <page pageid="45" ns="0" title="高性能MySQL笔记（下）" />
      <page pageid="55" ns="0" title="WEB" />
      <page pageid="56" ns="0" title="数据库" />
      <page pageid="95" ns="0" title="Index" />
    </pages>
  </query>
</api>