?????????????????(21?????????)???????????????«???????????»,??3??1??????
??,???“?”??,??????????????????????????1000?????????????“???????????”????????????80%,??500??????50%?????????????????????????????????????????????,????“????????????????????????”????????,???????,????????????
(???????????????? ??? ??)
?????:??
????:??8???????????
????????????????????
?????????????????????
???????4.3%????66?
???????????????????????
????:???????????
????:????????????
???????????“??”??????
10????20???????????????
??:???????????????????
??:??“??”????????????
????:???????????????
????????«????»?S?F4????
??8????????????????
???100???7????5???????
?????:???????????????
?????????????:???????!
???????????????“????”
????:?????????????????
?????????2??????????
???????????????????
?????:IS??????????
????23?????????????
«????»16?????S:?????????
???????????????????