???????????????

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

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

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

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

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