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="上线稳定性分析|1" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="0" title="首页" />
      <page pageid="116" ns="0" title="高分单科上线分析" />
      <page pageid="679" ns="0" title="同科均距" />
      <page pageid="680" ns="0" title="全科均距" />
      <page pageid="681" ns="0" title="异科均距" />
      <page pageid="683" ns="0" title="中考科目均距" />
    </pages>
  </query>
</api>