??????????? ??????????

????:?????:????????vx

???6???16? (?? ??????)???????????15??,??,????????????????????????????,???????????“????”???????????,??,?????????

????????????? ??????????

????,6????15???????20?16??8????,?34.6?,??135.4?????????????16???????8?,???4??

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

?????????,?????,???????????,???????????,???????,?????,??????,????????????????????,?13???

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

????????????,???15?,??115??????,??????????????,???????????????????????????(?????????)

???????:???