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>
    <recentchanges rccontinue="2014-11-16T13:34:23Z|484" />
  </query-continue>
  <query>
    <recentchanges>
      <rc type="edit" ns="0" title="志愿者管理系统" rcid="494" pageid="23" revid="493" old_revid="492" timestamp="2014-11-16T13:47:02Z" />
      <rc type="edit" ns="0" title="志愿者管理系统" rcid="493" pageid="23" revid="492" old_revid="490" timestamp="2014-11-16T13:45:29Z" />
      <rc type="log" ns="6" title="文件:增加岗位.jpg" rcid="492" pageid="140" revid="0" old_revid="0" timestamp="2014-11-16T13:44:35Z" />
      <rc type="edit" ns="0" title="志愿者管理系统" rcid="491" pageid="23" revid="490" old_revid="485" timestamp="2014-11-16T13:44:05Z" />
      <rc type="log" ns="6" title="文件:新增部门.jpg" rcid="490" pageid="138" revid="0" old_revid="0" timestamp="2014-11-16T13:40:29Z" />
      <rc type="log" ns="6" title="文件:修改.jpg" rcid="489" pageid="139" revid="0" old_revid="0" timestamp="2014-11-16T13:40:11Z" />
      <rc type="log" ns="6" title="文件:新增部门.jpg" rcid="488" pageid="138" revid="0" old_revid="0" timestamp="2014-11-16T13:38:32Z" />
      <rc type="log" ns="6" title="文件:部门列表.jpg" rcid="487" pageid="137" revid="0" old_revid="0" timestamp="2014-11-16T13:38:14Z" />
      <rc type="edit" ns="0" title="志愿者管理系统" rcid="486" pageid="23" revid="485" old_revid="484" timestamp="2014-11-16T13:37:05Z" />
      <rc type="edit" ns="0" title="志愿者管理系统" rcid="485" pageid="23" revid="484" old_revid="483" timestamp="2014-11-16T13:36:03Z" />
    </recentchanges>
  </query>
</api>