fix bug

apps/classroom/Tpl/default/Index/search_w3g.html

@@ -175,7 +175,7 @@
             </div>
 
             <!-- 下载提示 -->
-			<!-- <div v-show="yulan">
+            <div v-show="yulan">
                 <div class="yulanBox">
                     <div class="tips_box">
                         <img class="close_yulan" @click="close_yulan" src="/addons/theme/stv1/_static/img/guanbi@2x.png">
@@ -187,7 +187,7 @@
                         </div>
                     </div>
                 </div>
-			</div> -->
+            </div>
 
             <span style="margin-top: 35vh;" v-if="options[1].items.length == 0"
                   class="text_14_400 color_999999 self_center">没有找到！</span>
@@ -309,7 +309,7 @@
         data: function () {
             return {
                 keyword: "",
-                showHistory: true,
+                showHistory: false,
                 tab: 0,
                 options: [{
                     title: '视频',