????:1?????????:?????????AA

2???1?????????

3???????500?4???

4????????????

5?????????

?????????????????11????????????????????27? (?? ?)?????????????????27?,??????????,???,????????????????????

???????????,???????????????????????(????????????)???????????

???20??????,???????11????????????22????????????????????,???70???,??6?????????

?300????????????????????,?????8.6%???8.7%???????????????????,????????,????????(?????????????????????) ???:????????????