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

2??????

3????????

4?????600?????

5????????

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

????????,??????????????????,??,??????????80????????????????????100??????????,???????????????,????????,?????????????40%????????

???????????????????????????????????????,????????????,???????,????????40??????????????,???????????60%???????????,?????????????,???????????“?????????????”????????????

???,????,???????????????????,?????????????????????????,??,??5??,?????200?????????

???????????????????,????,?????????????????,?????????,??,????????,?????????????? ?????????????:???????