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

2???????????

3??????????

4???????

5????????vx

???6??????????13????? ?,??????6?11???

??,?????1932??????????????????11????????????????,1952????????????,1961????,1992???????????????,1994??????????????5?????????

??????????????1961????????????????????????????????????,???????????????????????????????,???

1992???,?????????,??????????,????????“?”,??????????,?????????????????

?,?????????????????3?????????????????,3????????????????????????????????????????????30????????????,20???,??????????????????,????????????

???1978????????????,1985?????,1997?????????????????????????(???????) ?????:????????