diff --git a/test.php b/test.php
index ac97104..e990479 100644
--- a/test.php
+++ b/test.php
@@ -12,7 +12,7 @@
     //mysql_select_db("my_db_test", $con);
     //name & student_id
     $chongfu="SELECT Student_ID FROM UserAnswer WHERE Student_ID=$_POST[student_id]";
-    if(mysqli_fetch_array(mysqli_query($chongfu,$con))[0]==$_POST[student_id])
+    if(mysqli_fetch_array(mysqli_query($con,$chongfu))[0]==$_POST[student_id])
     {
       die('对不起，您已参与过本活动。');
     }