A.若l∥α,l∥β,则α∥β | B.若l∥α,l⊥β,则α⊥β |
C.若α⊥β,l⊥α,则l⊥β | D.若α⊥β,l∥α,则l⊥β |
A.若m⊥α,n⊥β,m⊥n,则α⊥β |
B.若α⊥β,α∩β=m,m⊥n,则n⊥β |
C.若α⊥β,m⊥α,n∥β,则m⊥n |
D.若α∥β,m⊥α,n∥β,则m⊥n |
A.若α⊥β,m⊥α,则m∥β | B.若α⊥γ,β⊥γ,则α∥β |
C.若m⊥α,n∥m,则n⊥α | D.若m∥α,n∥α,则m∥n |
A.①② | B.②③ | C.③④ | D.④ |
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