1、 1 _ A 1 1 0 2 1 A 1 B 0 C 2 D 1 2 18 0.77% 18 18 A 16B 17C 15D 173 x 6 A x 3 3B x 9 x 3C x 2 x 3D x 3 +x 34 M(1 2m m 1) m 5 y=2x y= k x k x 0 A B C D 7 1 x x 8 6cm cm 9 AB CD E= 10 5 2 5 1 11 12 A 12cm B cm sin37 0.6 cos37 0.8 0.75 13 y=x 2 +bx+c 1 0 y A B AB x A 0 3 2 B 14 ABCD E AD BE ABE A CD F
2、FDE 16 FCB 28 FC 15 81 8 77 x xx 16 . 2 3 1 , 2 3 x x x x 17 12km A B C A 70km/h D sin54 0.8 cos54 0.6 tan54 1.4 B 1 BDE BDE=90 BD=4 2 D 5 0 BDO=15 BDE ABC C BD 2 AB O AB C D AB AD OC BC BD CD 62 ABD 3 A B 2 0 0 4 P AOB C AOP 45 P 4 40 / 700 y / x y 50+2x 15 15 50 1 5 2 10000 15 A B C D O C ( 3 ) x y B A P O 5 ABCD AC BD O AOB DOC D OC AC BD AC B M 1 ABCD 1 AOC BOD 2 ABCD AC kBD 2 AOC BOD AC BD AMB 5 2 A B C D C D O M 1 A B C D C D O M
