C | 02013 |
C | 22013 |
C | 42013 |
C | 62013 |
C | 20122013 |
C | 02013 |
C | 12013 |
C | 22013 |
C | 20122013 |
C | 20132013 |
C | 02013 |
C | 12013 |
C | 22013 |
C | 20122013 |
C | 20132013 |
C | 02013 |
C | 22013 |
C | 42013 |
C | 20122013 |
C | 02013 |
C | 22013 |
C | 42013 |
C | 20122013 |
C | 3n |
C | 4n |
n! |
3!(n-3)! |
A.1 | B.20 | C.35 | D.7 |
A.48 | B.24 | C.36 | D.64 |
A.150种 | B.10种 | C.12种 | D.6种 |
C | xx+2 |
C | 5x+1 |
C | 6x+1 |
C | x+42x |
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