1、 2015 06 10 1. 2015 1 1 2 A 2 B 1 2C 1 2D 2 2. 2015 2 A 6 a 2 a = 3 a B 6 a 2 a = 12 a C. 62 () a = 12 a D 22 ( 3) 9 aa - = - 3.(2015 2 ) ( ). 4 (2015 5 ) 50 30 x x A 1 B 2 C 3 D 4 5 (2015 10 ) A B C D 6 (2015 7 ) AOB OA AOB=37 36 OB E E OA D DC OB DEB A 74 12 B 74 36 C 75 12 D 75 36 7.(2015 3 ) y=
2、x 2 DO 4m AB A 20m B 10m C 20m D 10m 8 (2015 9 ) AB O CD CD AB E A A= D B CB BD C ACB=90 D COB=3 D 9 (2015 10 ) 2 y ax bx c 0 a 0 abc 0 c b a b a 0 4 2 b ac A 1 B 2 C 3 D 4 10.(2015 12 ) ABCD A 30 1 1 1 D C AB 1 1 C B CD E AB= 3 , ED AB 1 ( ). A 2 1 3 B 2 3 3 C 3 1 3 D 3 3 3 5 11 (2015 11 ) l1 l2 l3 l4 = 12 (2015 12 ) x*y= 2*1= =2 4*2 * 1 = 13 (2015 13 ) P1 1 m P2 2 n k y x 0 k m n = 14 (2015 17 ) ACB=9O D AB DC E CE= CD B BF DE AE F BF=10 AB 15 (2015 14 ) 4 14
