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

2?????90?????

3??????V

4??????????

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

???(12????)?????????????,????????????????????????????4??,??????,???,????????

??11??,???1.4????????4000????????????;

??1.4???????,??9000?????9.3??,???????3.5??;

??????????????2700??????????????,????(???????)?1000??????????????;

?????2400????????????????????????6000???

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

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