A:6
B:8
C:10
D:12
已知平面内两个定点A-1,0,B1,0,过动点M作直线AB的垂线,垂足为N.若MN2=AN→·BN→,则动点M的轨迹是( )
给下列图片选择合适的句子或对话。
A.It's cold.
B.It's 11:00.
C. Put on a cap
D. Is it cold? -No.it isn't.It is hot
E. Take off your shoes.