网址:http://m.1010jiajiao.com/timu_id_4052064[举报]
A.x-y-3=0 B.2x+y-3=0 C.x+y-1=0 D.2x-y-5=0
A.2x+y-3=0 B.x-y-3=0
C.x+y-l=0 D.2x-y-5=0
A.x+y+1=0 B.x-y+3=0 C.x+y+2=0 D.x-y-3=0
A.2x+y-3=0 B.x-y-3=0 C.x+y-l=0 D.2x-y-5=0