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

??2?22????(??????? ???????????)?????22??(??????“???”)?????????????,??????6????????15???

???,????D???????????,?,??????,???????????????

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

??????????,?????????????,?????????????50‰??????,???????????????,?4?????????6?????????,???????,???????

??????????2428?????????????/?,?27???????????????,???????

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

????PHM(??)?????????????????????,???????????????????????????????????????????,???????(??????????????????)