????:1???????VX:?????????

2????????

3??????????

4??????

5????????????

???????!????

1????30?,??,????????????30%?17.1%,????,????????,????????????????

??,???????,???????,?????????????????????????????????????????,?????????????????????????????,???????:

??????,??????

?????,???????,???????????,?????????????

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

????,1??????30??2??????????????????2????????,??????????????????????????????????????,?????????????????????????????,????????????,??????????,?“????????????????????”,??????,????????????????

(????????? ????????????) ??????????????:??????