A:竖直向下沿直线射向地面
B:相对预定地点,稍向东偏转
C:相对于预定地点,稍向西偏转
D:相对预定地点,稍向北偏转
—When shall we go hiking again?
—Make it _____day you like. It's all the same to me.
若i为虚数单位,则1+i1-i等于 ( )
下列古诗词中,体现对祖国情感的是( )