diff --git a/app/views/exercise/_edit_MC.html.erb b/app/views/exercise/_edit_MC.html.erb
index 008c95c24..adc955dee 100644
--- a/app/views/exercise/_edit_MC.html.erb
+++ b/app/views/exercise/_edit_MC.html.erb
@@ -1,63 +1,62 @@
-<%= form_for("",:url => update_exercise_question_exercise_index_path(:exercise_question => exercise_question.id),:remote => true) do |f|%>
-    <!--编辑单选start-->
-    <script type="text/javascript">
-        function resetQuestion<%=exercise_question.id%>()
-        {
-            $("#poll_questions_title_<%=exercise_question.id%>").val("<%= exercise_question.question_title%>")
-            $("#poll_question_score_<%=exercise_question.id %>").val("<%= exercise_question.question_score%>")
-            $("#poll_question_standard_answer_<%=exercise_question.id %>").val("<%= convert_to_char(exercise_question.exercise_standard_answers.first.exercise_choice_id.to_s)%>")
-            $("#poll_answers_<%=exercise_question.id%>").html("<% exercise_question.exercise_choices.reorder("choice_position").each_with_index do |exercise_choice,index| %>" +
-                    "<li class='ur_item'>" +
-                    "<label>选项<%=convert_to_char (index+1).to_s %><span class='ur_index'></span>：&nbsp;&nbsp;&nbsp;</label>" +
-                    "<input maxlength='200' type='text' name='question_answer[<%=exercise_choice.id %>]' placeholder='输入选项内容' value='<%=exercise_choice.choice_text %>'/>" +
-                    "<a class='icon_add' title='向下插入选项' onclick='add_single_answer($(this));'></a>" +
-                    "<a class='icon_remove'  title='删除' onclick='remove_single_answer($(this))'></a>" +
-                    "</li>" +
-                    "<div class='cl'></div>" +
-                    "<% end%>");
-        }
-    </script>
-
-    <div class="questionContainer" style="width: 680px;">
-      <div class="ur_editor_title">
-        <label>问题：&nbsp;&nbsp;</label>
-        <input name="question_type" value="<%=exercise_question.question_type %>" type="hidden">
-        <input name="question_title" id="poll_questions_title_<%=exercise_question.id %>" class="questionTitle" placeholder="请输入单选题题目" type="text" value="<%=exercise_question.question_title %>">
-      </div>
-      <div class="ur_editor_content">
-        <ul>
-          <li class="ur_item">
-            <label>分数<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>
-            <input type="text" id="poll_question_score_<%=exercise_question.id %>" name="question_score" style="width:40px; text-align:center; padding-left:0px;" value="<%= exercise_question.question_score %>">分
-          </li>
-          <div class="cl"></div>
-          <div id="poll_answers_<%=exercise_question.id%>">
-              <% exercise_question.exercise_choices.reorder("choice_position").each_with_index do |exercise_choice,index| %>
-                  <li class="ur_item">
-                    <label>选项<%=convert_to_char (index+1).to_s %><span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>
-                    <input maxlength="200" type='text' name='question_answer[<%=exercise_choice.id %>]' placeholder='输入选项内容' value="<%=exercise_choice.choice_text %>">
-                    <a class="icon_add" title="向下插入选项" onclick="add_single_answer($(this));"></a>
-                    <a class="icon_remove" title="删除" onclick="remove_single_answer($(this))"></a>
-                  </li>
-                  <div class="cl"></div>
-              <% end %>
-          </div>
-          <li class="ur_item">
-            <label>标准答案<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>
-            <input id="poll_question_standard_answer_<%=exercise_question.id %>" name="exercise_choice" placeholder="若标准答案为A，在此输入A即可" type="text" value="<%=convert_to_char(exercise_question.exercise_standard_answers.first.exercise_choice_id.to_s) %>">
-          </li>
-          <div class="cl"></div>
-        </ul>
-      </div>
-      <div class="ur_editor_footer">
-        <a class="btn btn_dark btn_submit c_white" data-button="ok" onclick="edit_poll_question($(this),<%= exercise_question.id %>,1);">
-          保存
-        </a>
-        <a class="btn btn_light btn_cancel" data-button="cancel" onclick="resetQuestion<%=exercise_question.id%>();pollQuestionCancel(<%= exercise_question.id%>);">
-          <%= l(:button_cancel)%>
-        </a>
-      </div>
-      <div class="cl"></div>
-    </div>
-    <!--编辑单选 end-->
+<%= form_for("",:url => update_exercise_question_exercise_index_path(:exercise_question => exercise_question.id),:remote => true) do |f|%>
+    <!--编辑单选start-->
+    <script type="text/javascript">
+        function resetQuestion<%=exercise_question.id%>()
+        {
+            $("#poll_questions_title_<%=exercise_question.id%>").val("<%= exercise_question.question_title%>")
+            $("#poll_question_score_<%=exercise_question.id %>").val("<%= exercise_question.question_score%>")
+            $("#poll_question_standard_answer_<%=exercise_question.id %>").val("<%= convert_to_char(exercise_question.exercise_standard_answers.first.exercise_choice_id.to_s)%>")
+            $("#poll_answers_<%=exercise_question.id%>").html("<% exercise_question.exercise_choices.reorder("choice_position").each_with_index do |exercise_choice,index| %>" +
+                    "<li class='ur_item'>" +
+                    "<input type='radio' style='width: 15px;' />"+
+                    "<label>选项<%=convert_to_char (index+1).to_s %><span class='ur_index'></span>：&nbsp;&nbsp;&nbsp;</label>" +
+                    "<input maxlength='200' type='text' name='question_answer[<%=exercise_choice.id %>]' placeholder='输入选项内容' value='<%=exercise_choice.choice_text %>'/>" +
+                    "<a class='icon_add' title='向下插入选项' onclick='add_single_answer($(this));'></a>" +
+                    "<a class='icon_remove'  title='删除' onclick='remove_single_answer($(this))'></a>" +
+                    "</li>" +
+                    "<div class='cl'></div>" +
+                    "<% end%>");
+        }
+    </script>
+
+    <div class="questionContainer" style="width: 680px;">
+      <div class="ur_editor_title">
+        <label>问题：&nbsp;&nbsp;</label>
+        <input name="question_type" value="<%=exercise_question.question_type %>" type="hidden">
+        <input name="question_title" id="poll_questions_title_<%=exercise_question.id %>" class="questionTitle" placeholder="请输入单选题题目" type="text" value="<%=exercise_question.question_title %>">
+      </div>
+      <div class="ur_editor_content">
+        <ul>
+          <li class="ur_item">
+            <label>分数<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>
+            <input type="text" id="poll_question_score_<%=exercise_question.id %>" name="question_score" style="width:40px; text-align:center; padding-left:0px;" value="<%= exercise_question.question_score %>">分
+            <span class="ml10">标准答案：请点击正确选项前面单选按钮</span>
+          </li>
+          <div class="cl"></div>
+          <div id="poll_answers_<%=exercise_question.id%>">
+              <% exercise_question.exercise_choices.reorder("choice_position").each_with_index do |exercise_choice,index| %>
+                  <li class="ur_item">
+                    <label>选项<%=convert_to_char (index+1).to_s %><span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>
+                    <input type="radio" style="width: 15px;" />
+                    <input maxlength="200" type='text' name='question_answer[<%=exercise_choice.id %>]' placeholder='输入选项内容' value="<%=exercise_choice.choice_text %>">
+                    <a class="icon_add" title="向下插入选项" onclick="add_single_answer($(this));"></a>
+                    <a class="icon_remove" title="删除" onclick="remove_single_answer($(this))"></a>
+                  </li>
+                  <div class="cl"></div>
+              <% end %>
+          </div>
+          <div class="cl"></div>
+        </ul>
+      </div>
+      <div class="ur_editor_footer">
+        <a class="btn btn_dark btn_submit c_white" data-button="ok" onclick="edit_poll_question($(this),<%= exercise_question.id %>,1);">
+          保存
+        </a>
+        <a class="btn btn_light btn_cancel" data-button="cancel" onclick="resetQuestion<%=exercise_question.id%>();pollQuestionCancel(<%= exercise_question.id%>);">
+          <%= l(:button_cancel)%>
+        </a>
+      </div>
+      <div class="cl"></div>
+    </div>
+    <!--编辑单选 end-->
 <% end%>
\ No newline at end of file
diff --git a/app/views/exercise/_new_MC.html.erb b/app/views/exercise/_new_MC.html.erb
index 4e9376214..c0a53b2e9 100644
--- a/app/views/exercise/_new_MC.html.erb
+++ b/app/views/exercise/_new_MC.html.erb
@@ -1,62 +1,62 @@
-<%= form_for(ExerciseQuestion.new,
-             :html => { :multipart => true },
-             :url=>create_exercise_question_exercise_path(exercise.id),
-             :remote=>true ) do |f| %>
-<div class="questionContainer">
-  <div class="ur_editor_title">
-    <label>问题：&nbsp;&nbsp;</label>
-    <input name="question_type" value="1" type="hidden">
-    <input name="question_title" id="poll_questions_title" class="questionTitle" placeholder="请输入单选题题目" type="text">
-  </div>
-  <div class="ur_editor_content">
-    <ul>
-      <li class="ur_item">
-        <% score = exercise.exercise_questions.where("question_type=1").last.nil? ? "": exercise.exercise_questions.where("question_type=1").last.question_score %>
-         <label>分数<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>
-         <input id="question_score" value="<%=score %>" type="text" name="question_score" style="width:40px; text-align:center; padding-left:0px;">分
-      </li>
-      <div class="cl"></div>
-      <div>
-          <li class="ur_item">
-            <label>选项A<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>
-            <input maxlength="200" type='text' name='question_answer[0]' placeholder='输入选项内容'>
-            <a class="icon_add" title="向下插入选项" onclick="add_single_answer($(this));"></a>
-            <a class="icon_remove" title="删除" onclick="remove_single_answer($(this))"></a>
-          </li>
-          <div class="cl"></div>
-          <li class="ur_item">
-            <label>选项B<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>
-            <input maxlength="200" type='text' name='question_answer[1]' placeholder='输入选项内容'>
-            <a class="icon_add" title="向下插入选项" onclick="add_single_answer($(this));"></a>
-            <a class="icon_remove" title="删除" onclick="remove_single_answer($(this))"></a>
-          </li>
-          <div class="cl"></div>
-          <li class="ur_item">
-            <label>选项C<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>
-            <input maxlength="200" type='text' name='question_answer[2]' placeholder='输入选项内容'/>
-            <a class="icon_add" title="向下插入选项" onclick="add_single_answer($(this));"></a>
-            <a class="icon_remove" title="删除" onclick="remove_single_answer($(this))"></a>
-          </li>
-          <div class="cl"></div>
-          <li class="ur_item">
-            <label>选项D<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>
-            <input maxlength="200" type='text' name='question_answer[3]' placeholder='输入选项内容'/>
-            <a class="icon_add" title="向下插入选项" onclick="add_single_answer($(this));"></a>
-            <a class="icon_remove" title="删除" onclick="remove_single_answer($(this))"></a>
-          </li>
-      </div>
-      <div class="cl"></div>
-      <li class="ur_item">
-        <label>标准答案<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>
-        <input id="question_standard_ans" name="exercise_choice" placeholder="若标准答案为A，在此输入A即可" type="text">
-      </li>
-      <div class="cl"></div>
-    </ul>
-  </div>
-  <div class="ur_editor_footer">
-    <a class="btn btn_dark btn_submit c_white" data-button="ok" onclick="add_poll_question($(this),1);"> 保存 </a>
-    <a class="btn btn_light btn_cancel" data-button="cancel" onclick="$(this).parent().parent().parent().remove();"> 取消 </a>
-  </div>
-  <div class="cl"></div>
-</div>
+<%= form_for(ExerciseQuestion.new,
+             :html => { :multipart => true },
+             :url=>create_exercise_question_exercise_path(exercise.id),
+             :remote=>true ) do |f| %>
+<div class="questionContainer">
+  <div class="ur_editor_title">
+    <label>问题：&nbsp;&nbsp;</label>
+    <input name="question_type" value="1" type="hidden">
+    <input name="question_title" id="poll_questions_title" class="questionTitle" placeholder="请输入单选题题目" type="text">
+  </div>
+  <div class="ur_editor_content">
+    <ul>
+      <li class="ur_item">
+        <% score = exercise.exercise_questions.where("question_type=1").last.nil? ? "": exercise.exercise_questions.where("question_type=1").last.question_score %>
+         <label>分数<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>
+         <input id="question_score" value="<%=score %>" type="text" name="question_score" style="width:40px; text-align:center; padding-left:0px;">分
+         <span class="ml15">标准答案：请选择</span>
+      </li>
+      <div class="cl"></div>
+      <div>
+          <li class="ur_item">
+            <label>选项A<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>
+            <input type="radio" style="width: 15px;" />
+            <input maxlength="200" type='text' name='question_answer[0]' placeholder='输入选项内容'>
+            <a class="icon_add" title="向下插入选项" onclick="add_single_answer($(this));"></a>
+            <a class="icon_remove" title="删除" onclick="remove_single_answer($(this))"></a>
+          </li>
+          <div class="cl"></div>
+          <li class="ur_item">
+            <label>选项B<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>
+            <input type="radio" style="width: 15px;" />
+            <input maxlength="200" type='text' name='question_answer[1]' placeholder='输入选项内容'>
+            <a class="icon_add" title="向下插入选项" onclick="add_single_answer($(this));"></a>
+            <a class="icon_remove" title="删除" onclick="remove_single_answer($(this))"></a>
+          </li>
+          <div class="cl"></div>
+          <li class="ur_item">
+            <label>选项C<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>
+            <input type="radio" style="width: 15px;" />
+            <input maxlength="200" type='text' name='question_answer[2]' placeholder='输入选项内容'/>
+            <a class="icon_add" title="向下插入选项" onclick="add_single_answer($(this));"></a>
+            <a class="icon_remove" title="删除" onclick="remove_single_answer($(this))"></a>
+          </li>
+          <div class="cl"></div>
+          <li class="ur_item">
+            <label>选项D<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>
+            <input type="radio" style="width: 15px;" />
+            <input maxlength="200" type='text' name='question_answer[3]' placeholder='输入选项内容'/>
+            <a class="icon_add" title="向下插入选项" onclick="add_single_answer($(this));"></a>
+            <a class="icon_remove" title="删除" onclick="remove_single_answer($(this))"></a>
+          </li>
+      </div>
+      <div class="cl"></div>
+    </ul>
+  </div>
+  <div class="ur_editor_footer">
+    <a class="btn btn_dark btn_submit c_white" data-button="ok" onclick="add_poll_question($(this),1);"> 保存 </a>
+    <a class="btn btn_light btn_cancel" data-button="cancel" onclick="$(this).parent().parent().parent().remove();"> 取消 </a>
+  </div>
+  <div class="cl"></div>
+</div>
 <% end %>
\ No newline at end of file
diff --git a/app/views/exercise/_show_MC.html.erb b/app/views/exercise/_show_MC.html.erb
index 28015a15c..c301e0fc4 100644
--- a/app/views/exercise/_show_MC.html.erb
+++ b/app/views/exercise/_show_MC.html.erb
@@ -1,111 +1,111 @@
-<div>
-  <div class="testEditTitle"> 第<%= exercise_question.question_number%>题.(<%= exercise_question.question_score %>分)<br />
-    <%= exercise_question.question_title %>
-    <span class="ml10">(<%= convert_to_char(exercise_question.exercise_standard_answers.first.exercise_choice_id.to_s) %>)</span>
-  </div>
-
-  <%= link_to("", delete_exercise_question_exercise_index_path(:exercise_question => exercise_question.id, :quest_num => exercise_question.question_number),
-              method: :delete, :confirm => l(:text_are_you_sure), :remote => true, :class => "ur_icon_de")  %>
-  <a class="ur_icon_edit" title="编辑" onclick="pollQuestionEdit(<%= exercise_question.id%>);"></a>
-  <a class='ur_icon_add' title='向下插入' id="add_mc_<%=exercise_question.id%>" onclick="dismiss('mc',<%=exercise_question.id%>);insert_MC('mc',<%=exercise_question.question_number%>,<%=exercise_question.id%>);"></a>
-  <div class="cl"></div>
-  <div class="ur_inputs">
-    <table class="ur_table"  style="width:675px;">
-      <tbody>
-      <% exercise_question.exercise_choices.reorder("choice_position").each_with_index do |exercise_choice,index| %>
-          <tr>
-            <td>
-              <label>
-                <input class="ur_radio" type="radio" name="<%= exercise_question %>" value="<%= exercise_choice.choice_text%>" >
-                <%= convert_to_char((index+1).to_s)%>&nbsp;&nbsp;<%= exercise_choice.choice_text%>
-              </label>
-            </td>
-          </tr>
-      <% end %>
-      </tbody>
-    </table>
-  </div>
-</div><!--单选题显示 end-->
-<!-- 新增问题 -->
-<div id="insert_new_poll_question_mc_<%=exercise_question.id%>">
-</div>
-
-<script type="text/javascript">
-    function insert_MC(quest_type,quest_num,quest_id){
-        var forms = $("form.new_exercise_question");
-        if($.trim($("#insert_new_poll_question_"+quest_type+"_"+quest_id).html()) == "") {
-            if(forms.length > 0){
-                alert("请先保存正在编辑的题目再新建。");
-            } else{
-                <% score =exercise_question.question_score %>
-                $("#insert_new_poll_question_"+quest_type+"_"+quest_id).html(
-                                '<%= form_for(ExerciseQuestion.new,:html=>{:multipart=>true},:url=>create_exercise_question_exercise_path(exercise_question.exercise.id),:remote=>true) do |f|%>'+
-                                ' <div class="questionContainer" style="width: 680px;"> '+
-                                '<div class="ur_editor_title"> '+
-                                '<label>问题：&nbsp;&nbsp;</label>'+
-                                '<input type="hidden" name="quest_id" value="'+quest_id+'"/>'+
-                                '<input type="hidden" name="quest_num" value="'+quest_num+'"/>'+
-                                '<input type="hidden" name="question_type" value="1"/>'+
-                                '<input name="question_title" id="poll_questions_title" class="questionTitle" placeholder="请输入单选题题目" type="text"/>'+
-                                '</div>'+
-                                '<div class="ur_editor_content">'+
-                                '<ul>'+
-                                '<li class="ur_item">'+
-                                '<label>分数<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>'+
-                                '<input value="<%=score %>" id="question_score" type="text" name="question_score" style="width:40px; text-align:center; padding-left:0px;"/>分'+
-                                '</li><div>'+
-                                '<li class="ur_item">'+
-                                '<label>选项A<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>'+
-                                '<input maxlength="200" type="text" name="question_answer[0]" placeholder="输入选项内容"/>'+
-                                '<a class="icon_add" title="向下插入选项" onclick="add_single_answer($(this));"></a>'+
-                                '<a class="icon_remove"  title="删除" onclick="remove_single_answer($(this))"></a>'+
-                                '</li>'+
-                                '<div class="cl"></div>'+
-                                '<li class="ur_item">'+
-                                '<label>选项B<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>'+
-                                '<input maxlength="200" type="text" name="question_answer[1]" placeholder="输入选项内容"/>'+
-                                '<a class="icon_add" title="向下插入选项" onclick="add_single_answer($(this));"></a>'+
-                                '<a class="icon_remove"  title="删除" onclick="remove_single_answer($(this))"></a>'+
-                                '</li>'+
-                                '<div class="cl"></div>'+
-                                '<li class="ur_item">'+
-                                '<label>选项C<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>'+
-                                '<input maxlength="200" type="text" name="question_answer[2]" placeholder="输入选项内容"/>'+
-                                '<a class="icon_add" title="向下插入选项" onclick="add_single_answer($(this));"></a>'+
-                                '<a class="icon_remove" title="删除" onclick="remove_single_answer($(this))"></a>'+
-                                '</li>'+
-                                '<div class="cl"></div>'+
-                                '<li class="ur_item">'+
-                                '<label>选项D<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>'+
-                                '<input maxlength="200" type="text" name="question_answer[3]" placeholder="输入选项内容"/>'+
-                                '<a class="icon_add" title="向下插入选项" onclick="add_single_answer($(this));"></a>'+
-                                '<a class="icon_remove" title="删除" onclick="remove_single_answer($(this))"></a>'+
-                                '</li></div>'+
-                                '<div class="cl"></div>'+
-                                '<li class="ur_item">'+
-                                '<label>标准答案<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>'+
-                                '<input name="exercise_choice" id="question_standard_ans" placeholder="若标准答案为A，在此输入A即可" type="text">'+
-                                '</li>'+
-                                '<div class="cl"></div>'+
-                                '</ul>'+
-                                '</div>'+
-                                '<div class="ur_editor_footer">'+
-                                '<a class="btn btn_dark btn_submit c_white" data-button="ok" onclick="add_poll_question($(this),1);">'+
-                                '保存'+
-                                '</a>'+
-                                '<a class="btn btn_light btn_cancel" data-button="cancel" onclick="$(this).parent().parent().parent().remove();">'+
-                                '<%= l(:button_cancel)%>'+
-                                '</a>'+
-                                '</div>'+
-                                '<div class="cl"></div>'+
-                                '</div>'+
-                                '<% end%>'
-                );
-                $("#poll_questions_title").focus();
-                }
-       }
-        else {
-            $("#insert_new_poll_question_"+quest_type+"_"+quest_id).html("");
-        }
-    }
+<div>
+  <div class="testEditTitle"> 第<%= exercise_question.question_number%>题.(<%= exercise_question.question_score %>分)<br />
+    <%= exercise_question.question_title %>
+    <span class="ml10">(<%= convert_to_char(exercise_question.exercise_standard_answers.first.exercise_choice_id.to_s) %>)</span>
+  </div>
+
+  <%= link_to("", delete_exercise_question_exercise_index_path(:exercise_question => exercise_question.id, :quest_num => exercise_question.question_number),
+              method: :delete, :confirm => l(:text_are_you_sure), :remote => true, :class => "ur_icon_de")  %>
+  <a class="ur_icon_edit" title="编辑" onclick="pollQuestionEdit(<%= exercise_question.id%>);"></a>
+  <a class='ur_icon_add' title='向下插入' id="add_mc_<%=exercise_question.id%>" onclick="dismiss('mc',<%=exercise_question.id%>);insert_MC('mc',<%=exercise_question.question_number%>,<%=exercise_question.id%>);"></a>
+  <div class="cl"></div>
+  <div class="ur_inputs">
+    <table class="ur_table"  style="width:675px;">
+      <tbody>
+      <% exercise_question.exercise_choices.reorder("choice_position").each_with_index do |exercise_choice,index| %>
+          <tr>
+            <td>
+              <label>
+                <input class="ur_radio" type="radio" name="<%= exercise_question %>" value="<%= exercise_choice.choice_text%>" >
+                <%= convert_to_char((index+1).to_s)%>&nbsp;&nbsp;<%= exercise_choice.choice_text%>
+              </label>
+            </td>
+          </tr>
+      <% end %>
+      </tbody>
+    </table>
+  </div>
+</div><!--单选题显示 end-->
+<!-- 新增问题 -->
+<div id="insert_new_poll_question_mc_<%=exercise_question.id%>">
+</div>
+
+<script type="text/javascript">
+    function insert_MC(quest_type,quest_num,quest_id){
+        var forms = $("form.new_exercise_question");
+        if($.trim($("#insert_new_poll_question_"+quest_type+"_"+quest_id).html()) == "") {
+            if(forms.length > 0){
+                alert("请先保存正在编辑的题目再新建。");
+            } else{
+                <% score =exercise_question.question_score %>
+                $("#insert_new_poll_question_"+quest_type+"_"+quest_id).html(
+                                '<%= form_for(ExerciseQuestion.new,:html=>{:multipart=>true},:url=>create_exercise_question_exercise_path(exercise_question.exercise.id),:remote=>true) do |f|%>'+
+                                ' <div class="questionContainer" style="width: 680px;"> '+
+                                '<div class="ur_editor_title"> '+
+                                '<label>问题：&nbsp;&nbsp;</label>'+
+                                '<input type="hidden" name="quest_id" value="'+quest_id+'"/>'+
+                                '<input type="hidden" name="quest_num" value="'+quest_num+'"/>'+
+                                '<input type="hidden" name="question_type" value="1"/>'+
+                                '<input name="question_title" id="poll_questions_title" class="questionTitle" placeholder="请输入单选题题目" type="text"/>'+
+                                '</div>'+
+                                '<div class="ur_editor_content">'+
+                                '<ul>'+
+                                '<li class="ur_item">'+
+                                '<label>分数<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>'+
+                                '<input value="<%=score %>" id="question_score" type="text" name="question_score" style="width:40px; text-align:center; padding-left:0px;"/>分'+
+                                '<span class="ml15">标准答案：请选择</span>'+
+                                '</li><div>'+
+                                '<li class="ur_item">'+
+                                '<label>选项A<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>'+
+                                '<input type="radio" style="width: 15px;" />'+
+                                '<input maxlength="200" type="text" name="question_answer[0]" placeholder="输入选项内容"/>'+
+                                '<a class="icon_add" title="向下插入选项" onclick="add_single_answer($(this));"></a>'+
+                                '<a class="icon_remove"  title="删除" onclick="remove_single_answer($(this))"></a>'+
+                                '</li>'+
+                                '<div class="cl"></div>'+
+                                '<li class="ur_item">'+
+                                '<label>选项B<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>'+
+                                '<input type="radio" style="width: 15px;" />'+
+                                '<input maxlength="200" type="text" name="question_answer[1]" placeholder="输入选项内容"/>'+
+                                '<a class="icon_add" title="向下插入选项" onclick="add_single_answer($(this));"></a>'+
+                                '<a class="icon_remove"  title="删除" onclick="remove_single_answer($(this))"></a>'+
+                                '</li>'+
+                                '<div class="cl"></div>'+
+                                '<li class="ur_item">'+
+                                '<label>选项C<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>'+
+                                '<input type="radio" style="width: 15px;" />'+
+                                '<input maxlength="200" type="text" name="question_answer[2]" placeholder="输入选项内容"/>'+
+                                '<a class="icon_add" title="向下插入选项" onclick="add_single_answer($(this));"></a>'+
+                                '<a class="icon_remove" title="删除" onclick="remove_single_answer($(this))"></a>'+
+                                '</li>'+
+                                '<div class="cl"></div>'+
+                                '<li class="ur_item">'+
+                                '<label>选项D<span class="ur_index"></span>：&nbsp;&nbsp;&nbsp;</label>'+
+                                '<input type="radio" style="width: 15px;" />'+
+                                '<input maxlength="200" type="text" name="question_answer[3]" placeholder="输入选项内容"/>'+
+                                '<a class="icon_add" title="向下插入选项" onclick="add_single_answer($(this));"></a>'+
+                                '<a class="icon_remove" title="删除" onclick="remove_single_answer($(this))"></a>'+
+                                '</li></div>'+
+                                '<div class="cl"></div>'+
+                                '</ul>'+
+                                '</div>'+
+                                '<div class="ur_editor_footer">'+
+                                '<a class="btn btn_dark btn_submit c_white" data-button="ok" onclick="add_poll_question($(this),1);">'+
+                                '保存'+
+                                '</a>'+
+                                '<a class="btn btn_light btn_cancel" data-button="cancel" onclick="$(this).parent().parent().parent().remove();">'+
+                                '<%= l(:button_cancel)%>'+
+                                '</a>'+
+                                '</div>'+
+                                '<div class="cl"></div>'+
+                                '</div>'+
+                                '<% end%>'
+                );
+                $("#poll_questions_title").focus();
+                }
+       }
+        else {
+            $("#insert_new_poll_question_"+quest_type+"_"+quest_id).html("");
+        }
+    }
 </script>
\ No newline at end of file
diff --git a/public/stylesheets/polls.css b/public/stylesheets/polls.css
index 9f7b2d021..cfc3b1b4a 100644
--- a/public/stylesheets/polls.css
+++ b/public/stylesheets/polls.css
@@ -89,7 +89,7 @@ a:hover.btn_cancel{ color:#666;}
 .ur_question_title{ width:534px; height:30px; border:1px solid #cbcbcb; padding-left:5px; margin-right:10px; background:#fff;}
 .ur_editor_title{ margin-bottom:10px;}
 .ur_editor_content{ }
-.ur_item{ margin-bottom:5px; height:32px; }
+.ur_item{ margin-bottom:5px; height:32px; line-height: 32px; vertical-align: middle; }
 .ur_item input{ width:324px; height:30px;border:1px solid #cbcbcb; padding-left:5px; float:left; margin-right:10px; background:#fff;}
 .ur_item label{ float:left;}
 .icon_add{ background:url(images/icons.png) 0px -310px no-repeat; width:16px; height:27px; display:block;float:left; margin-right:5px;}