????:1???????:??????

2?????????

3??????????

4???1?????????

5???????

??6???????21?(????????????????? ????????????)??,????21??,???????9721????????,???“???????”???????????????????

6????20??????????????????????????,????????(????? ???)

?21????16??,????????44.1?????????95%?????????????;?????????????????16????????????????????????????????????????,??????

?????????????????????????????????????I??????????,????????9721???????,?2793????????,???????????????????????????????????68??????,??189??

??????????????????250????????????????,???20??????,?,????????????????????????????????,??,???????????????“??????????????,?????????”????,?????????????????????,??????,??,??????????,????????

???????20????,??21??20??????????????,????,??????????????12????,????,??????????????

??,?21?????7???16.19?????,?????????,???????????????????,??????(??????????????????)

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