修改工种只有学习页面有

src/views/home/index.vue

@@ -8,7 +8,7 @@
       bind:click-right=""
     >
     </van-nav-bar>
-    <div class="dropdown-div">
+    <div v-show="activeTabName === 0" class="dropdown-div">
       <van-dropdown-menu active-color="#1989fa">
         <van-dropdown-item
           v-model="engineeringWorkChooseValue"