100 0a00C1 10b1 011b 100 即A=0a00|=1C1C2 10b1(3C4 011b              = b b a a A 0 1 1 1 0 1 0 0 0 1 0 0 , 3 4 1 2       = C C C C       =               A = a 1 C1 0 0 C2 0 1 1 0 0 a C3 b b 1 1 0 0 C4 即