修改基础数据的年级

TEAMModelOS.SDK/Models/Cosmos/School/Inner/Period.cs

@@ -9,7 +9,7 @@ namespace TEAMModelOS.SDK.Models
     {
         public Period()
         {
-            grades = new List<Grade>();
+            grades = new List<string>();
             subjects = new List<Subject>();
             semesters = new List<Semester>();
             analysis = new Analysis();
@@ -19,7 +19,7 @@ namespace TEAMModelOS.SDK.Models
         /// 高职教专业
         /// </summary>
         public List<Major> majors { get; set; }
-        public List<Grade> grades { get; set; }
+        public List<string> grades { get; set; }
         public List<Subject> subjects { get; set; }
         public List<Semester> semesters { get; set; }
         public string name { get; set; }