A:Worried.
B:Interested.
C:Puzzled.
There used to be a huge rock ____ ____ ____ ____ the Pearl River.
—No. I will
如图,在Rt△ABC中,∠ACB=90°,M为AB边的中点,将Rt△ABC绕点M旋转,使点A与点C重合得到△CED,连接MD.若∠B=26°,则∠BMD等于( )