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

2??????

3?????vx

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

5?????

???,??1065?????????????,???????????????????????????????????1???????,????????????44.95%?

????????????????,?,??600????,????????

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

???,???????????????????????????????????????????????40???????????????????498???,?“??????????????????????????????????”????????????????,??????????15????????,50??????????,?9????500???????

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????????????????????,??,??,????????“??”“??????????????????????”,??????????????,?????????????????

?????????? ??:???,??????????100???????????????????,???????????100?????,????????????????????????????????????????(????????) ????:??????????