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

????:1?????????:??????????
2???????????
3?????????
4????????
5?????????
???????????????2??22????(?? ??????)???22??(?????????????“????”)??????,??6????15??
????????,?????????????D?????????,???????????,??,????????????

??????,??????????;??????,?????????
??????,?????????????,??????????50‰????,??,???????????4??????????6???????,?,???????
?????????2428????/????,?27???????????????????,??

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