update

pbl.js

@@ -3335,7 +3335,7 @@ router.route("/copyCourse").all((req, res, next) => {
 router.route("/copyCourseSz").all((req, res, next) => {
     postmysql2(req, res, "copyCourse");
 });
-//复制课程
+//返回复制课程
 router.route("/getcopyCourseSz").all((req, res, next) => {
     postmysql2(req, res, "getcopyCourseSz");
 });