A 131 1135 0 0 32 ① 11 ① 000 1-45 ③④ —X 000 0002000 00 11-67 00 2021/2/202021/2/20 10 2 1 3 1 3 2 4 2 1 2 1 1 1 2 4 3 1 1 1 2 1 3 3 0 0 2 5 2 1 2 1 1 1 ( 2) 0 0 1 1 1 0 0 2 4 2 0 0 2 5 2 1 2 1 1 1 ( 2) 0 0 1 1 1 ( 2) 0 0 0 6 0 0 0 0 7 0 A     = - - -   -   +  -   - - ⎯⎯⎯⎯⎯⎯→ + -   -   +  -   - - ⎯⎯⎯⎯⎯⎯→ +  -  