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

2????????

3???????

4??????????

5????????

??????2?????????8?? (?? ?)?????8??,?????2??????????????(??????????????:??)?????????????,???????

?????????????????????

????11?????50?????????????????,???2?(?????????????????????????:?)??,???????,????????????????????????????????????????

???????,?????10??????30????3????????????????????,?????,????????????????????,??????????

??????????????,??50?????????,??????????????????????????????????25?????,??????

?,????????????????,???,????19??????????????????30????(??)

??:???