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若则( ) A.a<b<c B.a<c<b C.c<a<b D.b<c<a
若
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则( )
A.a<b<c
B.a<c<b
C.c<a<b
D.b<c<a
考点分析:
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、
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满足向量
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+
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与向量
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的夹角为
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,那么下列结论中一定成立的是( )
A.
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=
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B.|
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|=|
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|,
C.
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⊥
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D.
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∥
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