?????7???12?????????? (??? ????????????????????????)????????12????????????

?????????????:7????????????10??????,???,?,???????????,????????,?????????????????,???????????????????????????????

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

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

?????????????????????,????,??,?????????????????????????????????????????????,????????????(??????????) ??:??? “?????150??”_????

?? ????????“??????”????? ??:??????

????:1??????150??:????vx

2?????

3?????????

4?????????

5?????spa???

?????7???12?????????? (??? ????????????????????????)????????12????????????

?????????????:7????????????10??????,???,?,???????????,????????,?????????????????,???????????????????????????????

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

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

?????????????????????,????,??,?????????????????????????????????????????????,????????????(??????????) ??:???