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问题 选择题
已知直线m、n及平面α、β，则下列命题正确的是（　　）
A．
m∥α
n∥β
⇒α∥β		B．
m∥α
m∥n
⇒n∥α		C．
m⊥α
α⊥β
⇒m∥β		D．
m⊥α
n∥α
⇒m⊥n
答案

A：若m∥α，n∥β，则α∥β或者α与β相交，所以A错误．

B：若m∥α，m∥n，则根据空间中直线与平面的位置关系可得：n∥α或者n⊂α，所以B错误．

C：若m⊥α，α⊥β，则有m∥β或者m⊂β，所以C错误．

D：若m⊥α，n∥α，则根据空间中直线与直线的位置关系可得：m⊥n，所以D正确．

故选D．

改错题

短文改错（共10小题；每小题1分，满分10分）

Before I went to senior middle school,some peoples told me, “A life of senior middle school is unforgettable.” When I first entered into my senior middle school, anything seemed unpleasant. Facing all the strange things around me, I often miss my old friends and classmates. I didn’t want  to talk others or make friend with others. Little by little, my school records went from bad to worse, especially my maths. I couldn’t even pass the exam. I lost my heart and missed the happy times all day long.I told me, “I don’t belong to it, but I hate the life here.”
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单项选择题

大厨餐厅接待团体用餐时应充分做好准备工作，在客人预订到达前（）分钟上好冷盆。

A.2

B.5

C.10

D.15
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