试题与答案

设α,β,γ是三个不重合的平面,l是直线,给出下列命题: ①若α⊥β,β⊥γ,则

题型:填空题

题目:

设α,β,γ是三个不重合的平面,l是直线,给出下列命题:

①若α⊥β,β⊥γ,则α⊥γ;

②若l上两点到α的距离相等,则lα;

③若l⊥α,lβ,则α⊥β;

④若αβ,l⊄β,且lα,则lβ.

其中所有正确命题的编号是______.

答案:

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