2000?????????????????

????:??????:??????vx

?????1??????????????????????4???????????? (?????? ??)?????????????????23????????????????????4??,?33???2000?????5??,????????????????

1????????????4???????,???????? ??? ??

???,?????????????????2003?????????,?,????

2014?,??,???

???????25???????????,????????????????????????????????????????,?????“??”?

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

1????4????????????,?????????? ????????? ??????????????

??50????????25??????????6??????????????1.5?????0.3?????5????????,??

??2???????????????????,????????????????50????????????????,?????????????????????????????????????????????????50???????,????????????????????????

??????????????????,??????????????????????????????,??????????????????????????????????????????????(?)

???:??