var infos = [

    ['小A','女',21,'大一'],

['小B','男',23,'大三'],

['小C','男',24,'大四'],

['小C','男',24,'大四'],

['小D','女',21,'大一'],

['小E','女',22,'大四'],

['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] + "<br />");

}

}