His opinions are similar yours but different Julia's.
A:to; from
B:from; to
C:as; with
D:with; as
如图,在△ABC中,AD是△ABC的中线,分别过点B、C作AD及其延长线的垂线BE、CF,垂足分别为点E、F.
求证:BE=CF.
证明:
With the help of computers, people will find it easier to keep the traffic smoothly.