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

2??????

3?????????

4?????VX

5????????

8???13???,?,???????????????????5??????????????????????,????????????,??????????????????????????“??”????

???????????????“??”,??,???????????????????????,????????????,????,????60%~70%?

??????????????????????,?????????????????,????????????????,????????20???????????????????????3???????????????????,????80??????750??,???

(?????????????????????? ??????????????????? ??????????????? ?????????????????????????????? ??????? ????)

?:??????