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

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

3???????????

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

5??????v

????????11???????????????????7??????????????? (??????????????? ?)??6500???,?????????«?????????»?????11??????????????????7?????,???

???,??????????????????????6500???,????????????????8?????????????18????,??(?????????????????????????????5.41?)?????????????????????????????????????,??????????????????,???????????

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

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