Updated 教师偏好设置接口 (markdown)

@@ -17,8 +17,8 @@
 ######设置成功
 
    ```json
-{
-  "preference_setting_success": [
+
+[
     {
       "id": 1867,
       "pathFlag": 100,
@@ -36,15 +36,13 @@
       "image": "/image/abc.jpg"
     }
   ]
-}
+
 ```
 ######设置失败
 
 ```json
 
-{
-  "preference_setting_failed": "1"
-}
+  "preference_setting_failed"
 
 ```