fix bug

exam-work-api/src/main/java/cn/com/qmth/examcloud/service/examwork/service/ExamStudentService.java

@@ -260,6 +260,9 @@ public class ExamStudentService {
 		dto.setOrgId(org.getId());
 		dto.setOrgName(org.getName());
 		stuCheck(dto);
+		if(StringUtils.isEmpty(dto.getPaperType())){
+			dto.setPaperType("O");
+		}
 		return null;
 	}