?2??????????12????????????? ??????????????????,?????????????10????20????????????
???,????????,??,??,??????????,??????????????,???????????????,?????,????,?????????????????????????????????????????????
?????????????,???????????????,??????????,????????,???????????????????????????,???????????
????:??
????????????:?????????
?????????????????7???
??????????!??????????40?
?????????????15?????
????3???????7.2%
?????????????????????
????????10?50????????
“???”?“???”,?????????????
?????????????????????
??????:?????????????
???????????????????
??????????172?4.9???36.7?
?????????????????????
???????????????????
??:??????????????
??????????????????????
??????0.7%???0.8%
???????4???????????????
??????????????2000?????
?????????????????????
??:????????????
???????4???????????????
???????(?)“??”“??”“??”????…
???????????????????
???:????????????????