diff --git a/app/views/student_work/index.html.erb b/app/views/student_work/index.html.erb
index 614f108db..b38342777 100644
--- a/app/views/student_work/index.html.erb
+++ b/app/views/student_work/index.html.erb
@@ -43,7 +43,7 @@
   <li id="edu-tab-nav-2" class="new-tab-nav" onclick="HoverLi(2);">
     <a href="javascript:void(0);" class="tab_type">作品列表</a>
   </li>
-  <% if @homework.homework_type!= 4 && @is_teacher || (@homework.answer_public && @homework.homework_detail_manual.comment_status > 2) %>
+  <% if @homework.homework_type!= 4 && (@is_teacher || (@homework.answer_public && @homework.homework_detail_manual.comment_status > 2)) %>
       <li id="edu-tab-nav-3" class="new-tab-nav" onclick="HoverLi(3);">
         <a href="javascript:void(0);" class="tab_type">参考答案</a>
       </li>