feat：12月活动

mec-biz/src/main/java/com/ym/mec/biz/service/impl/DegreeRegistrationServiceImpl.java

@@ -106,6 +106,7 @@ public class DegreeRegistrationServiceImpl extends BaseServiceImpl<Integer, Degr
                     theoryMoney = new BigDecimal(320);
                     break;
                 case "免考":
+                    theoryMoney = new BigDecimal(0);
                     break;
                 default:
                     throw new BizException("您选择的乐理级别不存在，请核对");