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

2??????150?

3???98??

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

5????????

??????????12???20?????????????? ???12?????????????????????20???????????????,12?19????????,????

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

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

20?????????????????????????,?????????????????????????80?????????????(????????????????????????) ???????????:?????????????????????????