1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 1 9 2 3 4 2 1 2 AOB 3 O 1800 COD 4 OA OC OB OD AOB COD AOB COD BOC DOA AOB COB 3 0 0 0 a0=1 a 0 |0|=0 , =0 0n=0, n y=kx+b k 0 4 5 (1) (2) - ( ) 1 2 ( ) 1 ? 2 3 4 : 1 1 1 2 1 1 1.8 9.50 2 1 5.70 1 2 3 4 5 6 21 ( ) - ( ) ( ) - ( ) ( ) ( ) ( ) ( ) ( ) 1. 2 1972 118-119 2. 42 1972 125 3. 1997 11 4. 1998 4 5. 1996 98 (1) (2) (3) (4) (1) (2) (3) (4) (5) 21 1992 20 2008-04-10 15:45:28 ZB 19 30 1 ; J; ; 1998 04 2 ; J;
