— Is this ____________book?
— No, it's ___________book.
A:your, your
B:your, my
C:my, your
在△ABC中,AB=AC,∠A=60°,点D是线段BC的中点,∠EDF=120°,DE与线段AB相交于点E.DF与线段AC(或AC的延长线)相交于点F.