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>
    <allredirects garcontinue="MindManager|60" />
  </query-continue>
  <query>
    <pages>
      <page pageid="704" ns="0" title="层叠样式表" />
      <page pageid="1018" ns="0" title="ImageMagick 在windows 下的安装" />
      <page pageid="1184" ns="0" title="谷歌浏览器" />
      <page pageid="1305" ns="0" title="CSS讨论" />
      <page pageid="1509" ns="0" title="IE6中PNG-24图片无法显示Alpha通道的解决办法" />
      <page pageid="1515" ns="0" title="Chrome" />
      <page pageid="1527" ns="0" title="CSS选择器" />
      <page pageid="1956" ns="100" title="URL:0018" />
      <page pageid="2197" ns="0" title="Discuz!X/微商店/数据库字典/pre message queue" />
      <page pageid="2198" ns="0" title="Discuz!X/微商店/数据库字典/pre message log" />
    </pages>
  </query>
</api>