????:1????????150??:700?3??????????

2??????????

3??????????

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

5?????vx

????????6???27?????? 6??????????27???????????,??,????????????????

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

?,????????,????????????????????,??,?????????“??????????????????????”?????????????????????????“????”????????????????????,???,?????????????????????,?????,????????????,?????????????????????????,???????????????14?????????

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