fix：修改考试时间

src/components/exam/examCard.vue

@@ -162,7 +162,7 @@ export default {
   methods: {
     // 倒计时
     countDown(time) {
-      let sec = parseInt(10)
+      let sec = parseInt(time)
       clearInterval(this.countdownTimer)
       this.countdownTimer = setInterval(() => {
         sec--