— Let me get you something to drink. Which do you prefer, tea or coffee?
— ______, I would like to have some water.
A:Both
B:Neither
C:Either
如图所示,在△ABC中,AB=AC,∠A=36°,两条角平分线BE、CD相交于点O,则图中等腰三角形有( )
如图,已知四边形ABCD是平行四边形,DE⊥AB,DF⊥BC,垂足分别是为E,F,并且DE=DF.求证:四边形ABCD是菱形.