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>
    <imageusage giucontinue="6|Albert_Einstein_Head.jpg|20" />
  </query-continue>
  <query>
    <pages>
      <page pageid="4" ns="0" title="各班均分" contentmodel="wikitext" pagelanguage="zh-cn" touched="2016-04-06T02:48:40Z" lastrevid="1013" counter="122309" length="380" />
      <page pageid="7" ns="0" title="各班均分表-详细版" contentmodel="wikitext" pagelanguage="zh-cn" touched="2023-06-06T07:01:08Z" lastrevid="2651" counter="66402" length="2445" />
      <page pageid="8" ns="6" title="文件:2.png" contentmodel="wikitext" pagelanguage="zh-cn" touched="2015-07-08T11:01:52Z" lastrevid="65" counter="3042" length="21" />
      <page pageid="10" ns="0" title="特色班平均分" contentmodel="wikitext" pagelanguage="zh-cn" touched="2022-06-13T07:02:02Z" lastrevid="1785" counter="44225" length="716" />
      <page pageid="16" ns="0" title="命题老师" contentmodel="wikitext" pagelanguage="zh-cn" touched="2023-06-19T07:19:13Z" lastrevid="2768" counter="12404" length="457" />
    </pages>
  </query>
</api>