1、 10 1. 2015 4 A 0 B C D 1 D 2 (2015 4 ) A 55 a a a B 7 5 3 a a a C 33 (2 ) 6 aa D32 10 ( 5 ) 2 ab ab b D 56 a a a A 7 5 2 a a a B 33 (2 ) 8 aa C 32 10 ( 5 ) 2 ab ab b D D 1 2 3 4 3.(2015 4 ) 1 l 2 l 1= 62 2 ( ). A 152 B 118 C 28 D 62 D. 1 l 2 l 1 2 2 =62 . D. . 5 (2015 5 ) 50 30 x x A 1 B 2 C 3 D 4
2、C. . 6.(2015 10 ) 1 x 2 x n x 4 3 1 x 3 2 x 3 n x ( ). A 4 B 7 C 8 D 19 A. . 7 (2015 5 ) ABCD B D A ABCD B BD C ABCD D ABCD C 1 2 8 (2015 15 ) ABCD E AD AE=2ED EC BD F EF FC A 1 3B 1 2C 2 3D 3 2 A ABCD ED BC BC=AD DEF BCF EF DE FC CB ED=k AE=2k BC=3k EF FC = 3 k k = 1 3 A 1 2 9 (2015 6 ) A 24 B 12 C
3、 6 D 3 C r r r=6 C 10 (2015 10 ) y=k1x+2 x A y C y= B B0 S OBC=1 tan BOC= k2 A 3 B 1 C 2 D 3 D. 5 11 (2015 9 )2015 272000 272000 n n= 5 272000 5 n=5 5 12 (2015 10 ) b a / 55 1 65 2 3 60 3 3=180 - 1- 2=60 . 13.(2015 11 ) ABC AB=8 D E BC CA DE DE= 4 14.(2015 15 ) A B AB D OC AB C CD=10cm AB=60cm 50cm 1 2 3 15 (2015 16 ) P A CD C AB BD CD BD AB=1.2 BP=1.8 PD=12 8 AP PC APB= CPD Rt ABP Rt CDP AB CD BP PD CD= 1.2 12 1.8 =8 8
