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

2???????

3?????

4??????????

5????????

???????? (????????????????????? ?????????????????)??????,?????2???????8????,?????????50??????13????????,????5.3??,?75%,????

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

“???????????????????????????3?????????,??7500????????,?????95%?”??????????,????,???????,??????“????????”,??????????,?????,?????????????“????????????”,???????????????????????,??????????????,???

?,????????????????96.8%????????????????????2.2%???????1%,????,?????????????????????????,???????,???????????????? ????????????????????????:?????????????????????