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

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

???????????????6????????18?????????? (???????????????)“???????????????????????????????????????????????,?,??0.1%0.2%?????????,0.3%????????????????????,?????????????????????,?????????????……”

18??????????????,???????

6???????18???????????????????????????,????????????????????????????

??,????????8?????????????20??,??????,??,?????????????????10?????????????,?,??,????????????????

?20?????????

“???????,????????,????????,??????”??????

?????????,???????????6????????17????????????????,???,???2.59???????????,?533.7??????,????????3621.52????

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

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

“??????,?????????????,???????????????????,?????????,??????????,??????????,??????????????????????,?????????????????????????????????????”?????????????(???)

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