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原点O和点P(1,1)在直线x+y-a=0的两侧,则a的取值范围是( ) A.a...
原点O和点P(1,1)在直线x+y-a=0的两侧,则a的取值范围是( )
A.a<0或a>2
B.a=0或a=2
C.0<a<2
D.0≤a≤2
考点分析:
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是平面a内所有向量的一组基底,那么( )
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