— Did you read today's newspaper?— Yes,I did. There is . Do you want to know it?
A:exciting something
B:something exciting
C:exciting anything
D:anything exciting
如图,矩形ABCD的四个顶点位于双曲线y= kx 上,且点A的横坐标为5-12,S矩形ABCD=25,则k=( )