cf????????δ? ?????????????δ???

????????????????????cf????????????

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

1

??????ABC??????????￡??????a'''

????? ’ ??ENTER???????

2

?????2??ENTER??????????????????????1?{PageDown}

3

???????????3????????????????????

4

????????’????????????????????1??????

5 cf????????δ??

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

6

??????????

7

RT

????????????CF??????????

88 0 ????????????CF???????

????????????????????????????????????????40407???????40407????????