—She ________ be. She ________ be missing her grandma who has Alzheimer's.
如图,已知△ABC中,∠ABC=90°,AB=BC,三角形的顶点在相互平行的三条直线l1,l2,l3上,且l1,l2之间的距离为1 , l2,l3之间的距离为2 ,则AC的长是( )