fix bug

app/templates/exercise_export/blank_exercise.html.erb

@@ -69,6 +69,7 @@
             </div>
             <div class="pbt5">
               <img src="http://47.96.87.25:48080/api/attachments/368984" alt="电脑的电路图" title="电脑的电路图">
+              <img class="myavatar avatar-48" alt="udasker_picture" src="http://images.udask.cn/uploaders/user/picture/2/2_udasker.jpg?v=1556452947">
               <% q_markdown = to_markdown(q.question_title) %>
               <% if q.question_type == 5 %>
                 <% q_markdown_name = to_markdown(q.shixun_name) %>
@@ -85,14 +86,16 @@
                 <% q.exercise_choices.each_with_index do |s,index| %>
                   <p class="pbt5">
                     <span class="choose-radio"></span>
-                    <span class="mr15"><%= convert_to_char((index+1).to_s)%></span><span class="inline-block"><%= to_markdown(s.choice_text) %></span>
+                    <span class="mr15"><%= convert_to_char((index+1).to_s)%></span>
+                    <span class="inline-block"><%= to_markdown(s.choice_text) %></span>
                   </p>
                 <% end %>
               <% elsif q.question_type == 1 %>
                 <% q.exercise_choices.each_with_index do |s,index| %>
                   <p class="pbt5">
                     <span class="choose-checkbox"></span>
-                    <span class="mr20"><%= convert_to_char((index+1).to_s)%></span><span class="inline-block"><%= to_markdown(s.choice_text) %></span>
+                    <span class="mr20"><%= convert_to_char((index+1).to_s)%></span>
+                    <span class="inline-block"><%= to_markdown(s.choice_text) %></span>
                   </p>
                 <% end %>
               <% elsif q.question_type == 2 %>