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

2???????

3??????????

4??????vx

5?????????

11?23?27????,?,?,????,11???23???????27???????????????????????????????????,????,?6?10?,????????????????????????????12???14?,???16???,??????5?????????????????7??,????????????????????????8???????9????????????????????????????,????????????????????

?,???????????,??,????????,????,??????,????????????????????????????14?,?18?????(?????????????????)

??????:???