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【单选题】
已知sin（θ+π）＜0，cos（θ-π）＞0，则下列不等关系中必定成立的是（ ）A.
sinθ＜0，cosθ＞0
B.
sinθ＞0，cosθ＜0
C.
sinθ＞0，cosθ＞0
D.
sinθ＜0，cosθ＜0
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