A.α⊥γ且l⊥m                           B.α⊥γ且m∥β

C.m∥β且l⊥m                          D.α∥β且α⊥γ

A.α⊥γ且l⊥m                           B.α⊥γ且m∥β

C.m∥β且l⊥m                          D.α∥β且α⊥γ

如果直线l,m与平面α、β、γ满足：l=β∩γ，l∥α，m?α和m⊥γ，那么必有(    )

A.α⊥γ且l⊥m                           B.α⊥γ且m∥β

C.m∥β且l⊥m                          D.α∥β且α⊥γ

如果直线l、m与平面α、β、γ满足l＝β∩γ，l∥α，m⊂α，m⊥γ，那么必有(　　)

A．α⊥γ和l⊥m　　　　    B．α∥γ和m∥β

C．m∥β且l⊥m         D．α∥β和α⊥γ