We didn't visit the museum____ ____the heavy snow.
下面是鸡的受精卵及其胚胎发育的结构示意图,请据图回答问题:
如图,在△ABC中,∠A=90°,BD平分∠ABC,交AC于点D,且 AB=4, BD=5,则点D到BC的距离是( )