?? ???????????????

????:1?????300?2???:???????
2????????
3????????
4???????
5?????????
???12?19??? (????????????????? ???? ????????????????????)19?,?????????????“????????????”???,?????
???,????????????????????,?????????????????????????“1+N”??????

???????????????????????,8???????“???”????????????,????,??????????????,????????“?????”????“???????”??????????????“???”,???????????????????,???????????????????????????????????????????
??????????,????,??????????????,??????,???,?????????“??”???,???(????????????????????????????)
??????????????????:????????