如图,已知∠A=∠D=90°,E、F在线段BC上,DE与AF交于点O,且AB=CD,BE=CF.
求证:Rt△ABF≌Rt△DCE.
老虎在第一节车厢.
①熊猫排在____;
②松鼠排在____的前面;
③猴子排在____的后面,在____的前面 .
____ ____ does Rony need if he wants to buy the second-hand machine?