修改连词成句点击多次可以添加多个重复词问题

src/components/pages/addCourse.vue

@@ -6128,7 +6128,9 @@ export default {
       this.sentenceList[i].sentenceTitle = "";
     },
     setRightAnswer(s, i, j) {
-      this.sentenceList[i].rightAnswer.push(s);
+      if(this.sentenceList[i].rightAnswer.indexOf(s) == -1){
+        this.sentenceList[i].rightAnswer.push(s);
+      }
       // this.sentenceList[0].addSentence.splice(i, 1);
     },
     returnCard(r, i, j) {