已知AB=AC,AD=AE,欲证△ABD≌△ACE,须补充的条件是( )
A:∠B=∠C
B:∠B=∠E
C:∠1=∠2
D:∠CAD=∠DAC
20和16的等比中项是( )
The movie is ______, and Joan is ______ in it.
如图,将一副直角三角板叠在一起,使直角顶点重合于点O,则∠AOB+∠DOC=____度.