600815
wdrf
1C 2C 3D 4D 5B 6D 7B 8A 9C 10B 11D 12D 13C 14A 15B 16D 17A 18D 19C 20A 21B 22D 23C 24B 25A 26C 27C 28C 29A 30A
1C6d 7b 10b 14a16D 20a 21B 23C 24B 25a27c 30a
c c d d b d b a c b
D B C A B D A D C A
B D C B A C C C D A
微型计算机使用的键盘上a/t键称为退格键
34571015162021
1,2,3,4,5,6,7,9,10,11,12,13,15,16,18,19,21,22,23,24,26,27,28
1,2,3,4,6,9,11,12,13,16,18,19,22,23,26,27,28
1 C
2 C
3 D
4 D
5 B
6 D
7 B
8 A
9 C
10 B
11 D
12 D
13 C
14 A
15 B
16 D
17 A
18 D
19 C
20 A
21 B
22 D
23 C
24 B
25 A
26 C
27 C
28 C
29 A
30 A