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

2????????????

3???????

4???????

5???100??????

2?????10?????????,???,????????????????????(????)?????????,8???????????????????????????????,???,???,??

????,?????????,???3?????????????????????????,??????????700??????????????????????????????????????????????,??????????98.2%?

????????(???)???8???,???????????70???52?,??????20?????????????

????,????????2??20????????????????1?????????15?,?????????500?????????,?????????(??????? ????)

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