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

2???????????

3??????100????

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

5????????????

????????????????:???????,13.66???,?????????????,?????,??????????????????

????????????,??????,?????????,????80????????????????

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

???????7.9????

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

?????????????????,15????????,??600??,????????????

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

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

???????????:???????????????????+???????????? ?????????????

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

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

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

?????????,?????2000????,?????????2500???????????????????,????????4000?????????????????????

????:?????