????:1???????:??????

2????????

3?????vx??????

4????????

5?????vx

???1????21????? ????????????????,?????????????????«????»(????????«?»)?????,????????????????????????????,???

«????»???????,?????????????????,???,???,????????????????????,??????????,???????????????????????????????????????????«????»????????????????????????10??????????50????,????????????????,??????????????,?????????

?????????:?????