??????2??21????????????? (????? ???????????????)21??,??????8?????????????????????

??????????????????????,???????????????,?????????,????????4??????????????4?,????????????????????????????????,??????“??????????”????????????????????????,?,????????

??,???,?????,???????“????????????”??????“1+N”???????????,???,???,???????????????????,???????????????,?????,?????????????????????????????,?????????,?????(??????????)

????????:??????????????????????? “???????”????

?? ???????????8????????????

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

2?????????

3??????????????

4?????

5???????

??????2??21????????????? (????? ???????????????)21??,??????8?????????????????????

??????????????????????,???????????????,?????????,????????4??????????????4?,????????????????????????????????,??????“??????????”????????????????????????,?,????????

??,???,?????,???????“????????????”??????“1+N”???????????,???,???,???????????????????,???????????????,?????,?????????????????????????????,?????????,?????(??????????)

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