解 k000 ⅠO(kⅠO 0k00 kA=kl CI) kI k 2k k 0 k k0 k 2032 A+B +B1O+B2|-1301 C+B I+B22 0251 0021              − =        + + + + + =               − =        =        = 0 0 2 1 0 2 5 1 1 3 0 1 2 0 3 2 0 2 0 0 0 0 0 0 0 2 1 2 2 1 1 1 2 C B I B I B O B A B C I I O C I I O A k k k k k k k k k k k k k 解