A:AP⊥PB,AP⊥PC
B:AP⊥PB,BC⊥PB
C:平面BPC⊥平面APC,BC⊥P C
D:AP⊥平面PBC
对于经典力学理论,下列说法正确的是( )
—Would you mind staying in such a noisy room?
—No, but my son needs a _________ place to study in.