注册部分：
注册步骤1: class/register_step1.php
班级通讯录-注册第一步 include "config.php";
if ($Submit){
$answers1=trim($answers1);
$answers2=trim($answers2);
if (!($answers1==$answer1)||!($answers2==$answer2)){
echo "回答错误！
返回";
exit;
}
echo "回答正确，
进入第二步。";
exit;
}
?>
