由于大雾,该航班误点了。
已知三点A(﹣1,﹣1),B(3,1),C(1,4),则向量BC→在向量BA→方向上的投影为( )
The teacher's name is Henry Mason. His students call him ________.
After reading the novel Treasure Island, Paul has more than before because of the main character, brave Jim.