选修课 增加 重做按钮

learnOnline/pages/learnSystem/courseContent/examDetail/examDetail.wxml

@@ -34,7 +34,7 @@
   </view>
   <view class='btn {{exam.work_contents && "on"}}' bindtap='submitExam' data-submit='{{!!exam.work_contents}}'>{{exam.work_contents ? "已提交" : "提交"}}</view>
   <view class='care'>(注意：测试只有一次提交机会)</view>
-  <!--<block wx:if='{{!!exam.work_contents}}'>
+  <block wx:if='{{!!exam.work_contents}}'>
     <view class='btn' bindtap='repeatExam'>重做</view>
-  </block>-->
+  </block>
 </view>