????????????????? ????????????

??????2???13????????????? ????????13??,??,????,????????????????????????6~8????,???10~12?????????,?????????????????????????4~8????,?????10??

??????????????,????????,??????????????????????4~5?????????????,???????4~6????????????????????????6~7???????

??,??????14??15??,???????????????????????,??,???????????????;????,??????????????????????????????????????????????,???

??????,???????????????????,????;????,???????????????,?????????