???， ???? ?????? ??

PC?? ????? ???? ?? ????(?? 姜昌勳)? ?? 3? ?? ??? ???? ???? ??????? ????? 8? ???. ? ????? ????? PC 28?? ?? ??? ???? ??? ????? ????? ??, ???????? ????? ??? ???? ??. ???? ▲PC????(??) ▲??? ??(??) ▲??? ??(??? 5??) ▲??? ?? ??(〃10??) ▲??95(〃3??) ▲??96(〃4??)???. ???? ? ????? ???? ?????? 1?(??/??)→32?(????????)→2?(???? ??????)??? ????? `go nowstudy'? ??,??? ??? ??? ??.