A:
B:
C:
D:
Roy thinks he works as as his friend, Dan.
如图,在平面直角坐标系xOy中,直线y=3x经过点A,作AB⊥x轴于点B,将△ABO绕点B逆时针旋转60°得到△CBD.若点B的坐标为(2,0),则点C的坐标为( )
下列关于物态变化的说法中,正确的是( )