—He rides his bike.
A:how does he go to work
B:how he goes to work
C:how he went to school
D:where he goes
太阳光垂直照射到一很小的正方形小孔上,则在地面上产生光点的形状是( )
已知(x-1)2+4|y-6|=0,则5x+6y-4x-8y= ____