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设l1、l2是两条不重合的直线,α、β是两个不重合的平面,给出下列四个命题:①若...
设l1、l2是两条不重合的直线,α、β是两个不重合的平面,给出下列四个命题:①若l1⊂α,l2⊂β,l1∥β,l2∥α,则α∥β②l1⊥α,l2⊥α,则l1∥l2③若l1⊥α,l1⊥l2,则l2∥α④若α⊥β,l1⊂α,则l1⊥β,其中正确的命题个数为( )
A.0
B.1
C.2
D.3
考点分析:
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