diff --git a/IRaCIS.Core.Application/Service/Reading/Dto/ReadingQuestionViewModel.cs b/IRaCIS.Core.Application/Service/Reading/Dto/ReadingQuestionViewModel.cs
index 8fc31f5a..e8dd9435 100644
--- a/IRaCIS.Core.Application/Service/Reading/Dto/ReadingQuestionViewModel.cs
+++ b/IRaCIS.Core.Application/Service/Reading/Dto/ReadingQuestionViewModel.cs
@@ -445,7 +445,7 @@ namespace IRaCIS.Core.Application.Service.Reading.Dto
 		/// <summary>
 		/// 答案分组
 		/// </summary>
-		public string AnswerGroup { get; set; }
+		public string AnswerGroup { get; set; }=String.Empty;
 
 		/// <summary>
 		/// 类型