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

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

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

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

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