?? ???????:?6.7??????????
????:1????????????:???????????
2??????
3????????
4????????QQ
5???????
??6????26?????????? ??25???????????
?,??????,???,????????????????????????,???6.7????,????3????????,????????
????,????????????,??2?????,?????1.8????,?????????????????????????????????????1.75?????????,?6?????????400??(????????6.21?????????)?????,??3?????
???????????,???????????????????????,??????,?????????,?????(??) ????????:????????????