——________?——He is quiet and doesn't like talking much.
A:What would he like?
B:What does he look like?
C:What's he like?
D:What does he like?
一束光线自点P(﹣1,1,1)发出,被yOz平面反射到达点Q(﹣6,3,3)被吸收,那么光线所走的距离是( )
若n边形的每个内角都是150°,则n=____