Fix bug

app/templates/exercise_export/blank_exercise.html.erb

@@ -80,15 +80,15 @@
               <% if q.question_type ==  0 %>
                 <% q.exercise_choices.each do |s| %>
                   <div class="pbt5 clearfix v-middle">
-                    <span class="choose-radio pull-left line-20"></span>
-                    <span class="inline-block pull-left line-20"><%= to_markdown(s.choice_text) %></span>
+                    <span class="choose-radio pull-left line-24"></span>
+                    <span class="inline-block pull-left line-24"><%= to_markdown(s.choice_text) %></span>
                   </div>
                 <% end %>
               <% elsif q.question_type == 1 %>
                 <% q.exercise_choices.each do |s| %>
                   <div class="pbt5 clearfix v-middle">
-                    <span class="choose-checkbox pull-left line-20"></span>
-                    <span class="inline-block pull-left line-20"><%= to_markdown(s.choice_text) %></span>
+                    <span class="choose-checkbox pull-left line-24"></span>
+                    <span class="inline-block pull-left line-24"><%= to_markdown(s.choice_text) %></span>
                   </div>
                 <% end %>
               <% elsif q.question_type == 2 %>

app/templates/exercise_export/exercise_export.css

@@ -309,8 +309,8 @@ textarea{
     clear:both;
     zoom:1;
 }
-.line-20{
-    line-height: 20px;
+.line-24{
+    line-height: 24px;
 }
 .line-20 P{
     margin-bottom:0;