var infos=[['小A','女','21','大一'],['小B','男','23','大三'],['小C','男','24','大四'],['小D','女','21','大一'],
           ['小E','女','22','大二'],['小F','男','21','大一'],['小G','女','22','大二'],['小H','女','20','大三'],
           ['小I','女','20','大一'],['小J','男','20','大三']];
 
 for(var i=0;i<=infos.length;i++)
 {
     if(infos[i][3]=='大一'&&infos[i][1]=='女'])
 {document.write(infos[i][0]);
 }
 }