优化文字

src/pages/exam/mockExam/exam/index.vue

@@ -152,7 +152,7 @@ export default {
       clearInterval(this.time.clearTime)
       this.time.clearTime = setInterval(() => {
         if (this.$route.query.id) {
-          this.time.examTimeText = '00:00:00'
+          this.time.examTimeText = ''
           return false
         }
         sec--