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

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

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

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

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

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

2?????

3?????

4?????????

5??????????

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

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

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

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