Dora has some shortcomings but ________ she seems like an intelligent,likable person. ( )
A:on the contrary
B:up to now
C:in return for
D:on the whole
如图,已知E、F是平行四边形ABCD对角线AC上的两点,且BE⊥AC,DF⊥AC.求证:△ABE≌△CDF.
读下面我国某条大河水系图,该水系拥有我国最大的水电站,它是( )