????6??????????

????:??????:???????????

???????6?????13? (? ???????)??????????????????????????????13?????,??6????????,???????????????3??,???

?????,13???????????15??,???????????,??,????????????????????????????,?????????,?????????????????

??,13??????????????15??,????40??80???????,?????100??,?????,?????????????????????????????????250???????400????????????????13????????????15??

???12??18????????????????????????

“????,??,?,??,??,??????”???

?????,16?????17??????????,??????????,?16??18???????????,??????????????????????????,???????????????,???

???????????,19????,??????????????,???????????????????????,??6??8????????????????,?????,??

??,????????????,?,???????????????????19???21??????????????????,?????,?????????????????????????????????????????????????,?????????(????????) ???????????????????:??????????????