?? “????????”??????????
????:1???????:????vx
2????F?
3?????????
4??????????
5????????????
???????11??30????? (????????????????????????? ??????? ????)11??????29????????12????????????????1???????????,“12.4”?????“??????????”??????
????,??????,?????????????????,?????????????????,??????????????????????????????????????
??????????? ?????????????????????????????????????????????????????????????,????????????????,???
???,?,???????????????????????
?,????,???(??)
????????????????????????????:?????????????????