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【单选题】
.已知不重合的平面 、β和不重合的直线m、n，给出下列命题： m∥n，n? ?m∥ ； m∥n，n? ?m与 不相交; ∩β＝m，n∥ ，n∥β?n∥m； ∥β，m∥β，m ?m∥ ； m∥ ，n∥β，m∥n? ∥β； m? ，n?β， ⊥β?m⊥n； m⊥ ，n⊥β， 与β相交?m与n相交； m⊥n，n?β，m β?m⊥β; 其中正确的个数为( )A.
1
B.
2
C.
3
D.
4
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