上传答案为空修改

EBook.Web/Common/tasklib_book.js

@@ -1469,7 +1469,9 @@ function reviewAnswer(answerJson) {
                 $(selectElement).children(".answer-text").show();
                 $(selectElement).children(".answer-text").text(answerObj.Text);
             }
-
+            else {
+                $(selectElement).children(".answer-text").text("");
+            }
             //是否之前存在作答音频
             $(selectElement).attr("answer-url", answerObj.AudioUrl);
             $(audioElement).attr("src", PicInfo.recordPlayImgUrl);