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

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

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

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

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

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