????:1?????????:?????v

2??????????

3?????????

4???????vx

5??????

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

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

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

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