A:taking; to put
B:to take; to put
C:to have taken; putting
D:to take; putting
点M(-sin60°,cos60°)关于x轴对称的点的坐标是( )
①画出确定C地位置的图是方法,保留痕迹.②画出C点到直线AB的最短距离路线图,保留痕迹.