code reviewed by zhaobiao

@@ -18,7 +18,7 @@
                     </div>
                     </div>
 
 
                     <div class="answer">
                     <div class="answer">
-                            <span class="iconfont">&#xe63c;</span>
+                            <span class="iconfont">&#xe63f;</span>
                             <p>{{answer}}</p>
                             <p>{{answer}}</p>
                     </div>
                     </div>
              </div>
              </div>