bugfix 错题解析

src/pages/bank-exam-wrong-explain/index.vue

@@ -19,6 +19,7 @@
               <div class="left-box">
                 <Header-tab-box
                   :num="questionOverNum(true)"
+                  :allNum="questionList.length"
                   @prevQuestion="prevQuestion"
                   @nextQuestion="nextQuestion"
                 ></Header-tab-box>