— Ann is in hospital.
— Oh, really? I ________ know. I ________ go and visit her.
A:didn't; would
B:don't; would
C:don't; will
D:didn't; will
下列方程中是二元一次方程的是( )
为了保证居住区街道两侧所有建筑物都有较好的日照条件,城镇街道宜采取南北方向和东西方向的中间方位,使街道与子午线的夹角为 ( )
下列证据中,证明地球是个球体的最有力证据的是