???????1?7? (???? ?????????????????????????)??1??????????7??????,???????????????6.8????????????,???

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

?,??????????????????????????26???????????,????

??,??1?????7????????9?????????????5????????,??(?????????????????28.50???,?87.45?)????6.8??,?10???????????????????????????????,?10??????4471????????????(??) ?????????????:????????????????? “????????”_????

?? ?????:????6.8?????????????

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

2??????????

3????????vx

4??????

5?????95?98???

???????1?7? (???? ?????????????????????????)??1??????????7??????,???????????????6.8????????????,???

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

?,??????????????????????????26???????????,????

??,??1?????7????????9?????????????5????????,??(?????????????????28.50???,?87.45?)????6.8??,?10???????????????????????????????,?10??????4471????????????(??) ?????????????:?????????????????