??2???????????????????2??? (????????????????? ???????????????????)????????????(????????????)??2??1?,?????????????

??????????????,?????????????????2?1??,?,?????????????????????????????

??,??????????????????????????,????????????????????,??

??????????????2?1?????????????,????????????????90%????????

2??????????????2????,??????????????,?????????????(????) ??:?????? ??“????600??”????

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

????:1?????600??:????98?

2???????

3?????

4?????????

5???????

??2???????????????????2??? (????????????????? ???????????????????)????????????(????????????)??2??1?,?????????????

??????????????,?????????????????2?1??,?,?????????????????????????????

??,??????????????????????????,????????????????????,??

??????????????2?1?????????????,????????????????90%????????

2??????????????2????,??????????????,?????????????(????) ??:??????