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

2?????

3???????

4??????????

5??????????

12????????20?,????????????????????????????????(??????????“?????”???“????”),?????????,????????????

????“?”(???????????????,???????)???68.6??,??????????????3??

??2???1??????????????????2????,??????????2??????????????????????????1????????????2????????????????????7?????,???5???,?2???

????,????40?????,?????????,????????

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

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