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

2????????

3??????

4?????????????

5????????

?????????????10?14? (?????? ???????????)????14????,??8?????;????,??,??????12??

14?,??????????14?6??,???????????14??,??????????????????????????????????????????????????????????????????????????,????,???????????????????????500??????????????,?200???

???????????????????????????,?????????,?????14?????,?????,????????????????

?????,?,?????????,14??????15??????,????????5?????????????????6????????7??8????????,?6????10?,??????12????????

???????,14??,??21?,15??8?,????“?”,??,??????

????,18??????????,?????????????????,?????????????????,18??????19??????,???(????????????) ??????:??????