????????? ????? 97??????? 2??? 4??? ????. ??? 5? ?? ??????? ??? ??? A? ???? ????? 3?0(15―9, 15―8, 15―4)?? ????. ??? ??? 3??? ???? ??, ??? ? ??? ?? ????. ? ????? ??? ???? ????? ??? ????? 3?0(15―12, 15―4, 15―3)?? ???? 2?1?? ??, ??? ?? ? 2?? 4??? ????. 〈?????〉