diff --git a/test_server/examtest/views.py b/test_server/examtest/views.py
index df16932..c5eef77 100644
--- a/test_server/examtest/views.py
+++ b/test_server/examtest/views.py
@@ -260,7 +260,7 @@ class WorkScopeViewSet(ModelViewSet):
         ret['panduan_score'] = workscope.rule.panduan_score
         question_queryset = Question.objects.none()
         questioncats = workscope.questioncat.exclude(name='辐射小知识更新中').order_by('type', 'create_time')
-        if questioncats.count() == 3:
+        if questioncats.count() == 3 and questioncats.filter(name='电离辐射法律法规').exists():
             import random
             b2 = random.randint(1,8)
             b3 = random.randint(1,9-b2)