-52×34+25×12-25×14=-25×34+25×12-25×14=(-34+12-14)×25=-1212.
甲球的重力是乙球的5倍,甲、乙分别从高H、2H处同时自由落下(H足够大),下列说法正确的是( )
A.同一时刻甲的速度比乙大
B.下落1m时,甲、乙的速度相同
C.下落过程中甲的加速度大小是乙的5倍
D.在自由下落的全过程,两球平均速度大小相等
Thank you so much! But for your text message, I ___________ home without my ID card this morning.
A.would have left
B.would leave
C.had left
D.left