?? ?????!????“??????????”??
????:1??????????:?????????????
2?????
3????????
4??????????????
5??????v
12?????????28????????,??“?”?????????????
??,???????,?,????????
??????????,??“??”????????6???????28???,??6?????????????,????????,????“??”?,?????????,??12kg?
???????????,??“??????????”??,????????????“??”?“??”???,?????????,????“???????”???????????,“?????????”??,?????????????(??????????????????? ?????????)
??:????????????