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

2???gm????

3???????

4??????????

5???400??

?????????????????????????12???21??????????? (??)????,????????,????,???????????????????2????????????????(???????????????,???????????????????)???????????2000???????500????????????????,???????????????????????345?????,5000?229???????

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

12?????????20??,????“????”?,?????????????????“?????????????”????,??????,????????????????,?????????????????

????????,??????????????,????????????,???????????????????,??,??50???,??????????????????,??,??????????????????????????????????????

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

??,??,??????????????????????????,?????????????????????,????????????????????????????????

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

??,??????,??????14?????16?????19??????????112???????,?????????98%;?2????????????,????3?????(????)

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