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

2?????qt??

3???????vx

4?????300????

5??????????

?????12???????????3?? (??? ???)???A??3???????(??)???????????,????,?,??????“???????????????”?

????????,?????3378??,?????????0.44%;?10713????,????????????????0.4%;??2245?,?????0.44%?

??????????,??????12???????????,A????????,?,????,????????????,??????????,??A??????

????????,?????,????????????????7.3%,??A???;???,????????????????30%??????,???????10%?

??????????????,????,???????????10%??,???????????????????????????????????

???,????????,?????“??”?????,??????????????????????????????????????????,?????????????????????????,????,???????(??) ??:??????????????????