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>
    <allfileusages gafcontinue="Vektor-place-for-adv.gif|33" />
  </query-continue>
  <query>
    <pages>
      <page pageid="3" ns="0" title="Анкета знакомств: Aragorn" />
      <page pageid="5" ns="0" title="Виртуальные знаки" />
      <page pageid="10" ns="10" title="Шаблон:Noads" />
      <page pageid="12" ns="0" title="Субвекторный виртуальный знак" />
      <page pageid="24" ns="0" title="Сочетания знаков" />
      <page pageid="26" ns="0" title="Крыса-Овен" />
      <page pageid="178" ns="0" title="День Козы" />
      <page pageid="197" ns="0" title="День Змеи" />
      <page pageid="199" ns="0" title="День Тигра" />
    </pages>
  </query>
</api>