????????:??????????????
??????????????????????2???????????????21??? ??????21??,????????????????????,??
????,2??????????20?????,??????????????????2????????C-208????????????????????1?N-22????????,????????????
?????????,?,??????,??2??????18????,??????????1???C-208??,??????????????,218?920?????????,???????,???,???????,??????????“??????”??????????????????????????????????,????,???????,??(?)

??
???:????