?2????????11??? ??????(ABC)??????????,?????10???,????,????51??,?20?????

?:????(ABC)????

???????,????,????????????,????????????,???

???,????????????,?????????,??????????????????

???,????

??????????,?????,????????????????

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

?? ??????????51??????????? ???

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

2???????

3?????????

4????????????

5?????

?2????????11??? ??????(ABC)??????????,?????10???,????,????51??,?20?????

?:????(ABC)????

???????,????,????????????,????????????,???

???,????????????,?????????,??????????????????

???,????

??????????,?????,????????????????

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