fix

examcloud-core-questions-service/src/main/java/cn/com/qmth/examcloud/core/questions/service/impl/RandomPaperServiceImpl.java

@@ -730,6 +730,7 @@ public class RandomPaperServiceImpl implements RandomPaperService {
 				if (QuesStructType.NESTED_ANSWER_QUESTION.equals(rq.getQuestionType())
 						&& CollectionUtils.isNotEmpty(qdto.getSubQuestions())) {
 					List<RandomPaperQuestion> subQuestion = new ArrayList<>();
+					rq.setSubQuestions(subQuestion);
 					List<Double> subScores = getSubScoreList(rq.getScore(), qdto.getSubQuestions().size());
 					int i = 0;
 					for (QuestionDto subQd : qdto.getSubQuestions()) {