Updated 在线授课接口定义 (markdown)

@@ -75,7 +75,26 @@ Response：
       "record_time": 0,
       "word_count": 209
     },
-    "course_type_ratio": {}
+    "course_type_ratio": {
+    [
+    {
+        "course_type": "口语",
+        "ratio": "30%"
+    },
+    {
+        "course_type": "听力",
+        "ratio": "50%"
+    },
+    {
+        "course_type": "测验",
+        "ratio": "10%"
+    },
+    {
+        "course_type": "单词",
+        "ratio": "10%"
+    }
+]
+    }
   },
   "group_room_info": {
     "group_name": "BOXFiSH Online Teaching Group",