?? ?????????????? ??????????????
????:1??????:?????150??????
2????????????
3??????????
4???????
5?????vx
???? ??????(9????????29????)????,???????,??,????,??????????,????????,?,??????????
????????,?????29?????????30?????????,??,???,??30???,????????????,??????
???????,????????????29?????????30????????????,???3????4????????,??????????????6?????????;??,30???21?,????????12??
????,????????????(10?????????????1?????7??????),?????,??????????????1???????3?4??????,??????????7????????????????,??????????,??;7??????????????19??23?,????????8???????12??????,????,????,??????????,???
?,?????????????????,????,???????????,?10??7????,???,????????,????????????????,??,??,?????????? ???????:??