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圆锥曲线的准线方程是( ) A.ρcosθ=-2 B.ρcosθ=2 C.ρsi...
圆锥曲线
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的准线方程是( )
A.ρcosθ=-2
B.ρcosθ=2
C.ρsinθ=-2
D.ρsinθ=2
考点分析:
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