A:Open the door.
B:Close the door.
形近字组词
逢____ 饿____ 银____ 遥____
峰____ 娥____ 跟____ 摇____
如图,已知∠ACB=90°,AC=BC,BE⊥CE,AD⊥CE于点D,AD=2.5 cm,DE=1.7 cm,则BE=( )