A:若m∥α,n∥β,m⊥n,则α⊥β
B:若m∥α,n⊥β,m∥n,则α∥β
C:若m⊥α,n∥β,m⊥n,则α∥β
D:若m⊥α,n⊥β,m∥n,则α∥β
I think this sweater is too____(昂贵的).
新型的师生关系建立的基础是学生自立。( )