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

2??????

3?????VX

4?????500??????

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

???????????2??????????????17? (????????????????)???17?????????,?????«?»?????????????????,«?»(1982???????????)?????????????????????

???????????21?????????????,?????“Z??”????,2200?????89%?

??????????????,??:«???»(1982???)????«?????????????????????»?«????»(1994??????)???,??????,???????????

?????????????????????????,«?????????????????»??,???????????,???«?????:????»???

???????????????????21????????????????????????????,????????????????1800????,??2????????????????,????????????????????????,?????????????????,??????????????????????????????(??????????????????) ??????????????:????