Would you like ____ (play) football with us after class?
已知单位向量a、b,满足a⊥b,则函数fx=xa+b2(x∈R)( )
如图,已知△ABC的三个顶点的坐标分别为A(﹣2,3)、B(﹣6,0)、C(﹣1,0).