A:{﹣3,﹣2,﹣1,0}
B:{﹣2,﹣1,0}
C:{﹣3,﹣2,﹣1}
D:{﹣2,﹣1}
如图,E、F分别是三棱锥P-ABC的棱AP、BC的中点,PC=10,AB=6,EF=7,则异面直线AB与PC所成的角为( )
Pandas are very special _____________ us.
What major did the man choose in the end?