A:旦日飨士卒
B:夫秦王有虎狼之心
C:此其志不在小
D:常以身翼蔽沛公
如图,Rt△ABC绕O点逆时针旋转90°得Rt△BDE,其中∠ABD=∠ACB=∠BED=90°,AC=3,DE=5,则OC的长为( )
— Could you tell me ___________ ?— By searching the Internet.
计算:
7×25×4=____16×125=____45+567+155=____