Merge branch 'feature/chenshu/educationalTools' into gray

src/modules/teach-tool/paper-manage/modal/PreviewPaperModal.jsx

@@ -8,6 +8,7 @@
  */
 import React, { Component } from "react";
 import { Modal, ConfigProvider, Empty } from "antd";
+import Lottie from 'react-lottie';
 import User from "@/common/js/user";
 import AidToolService from "@/domains/aid-tool-domain/AidToolService";
 import "./PreviewPaperModal.less";