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如图,已知:45°<A<90°,则下列各式成立的是( )
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A.sinA=cosA
B.sinA>cosA
C.sinA>tanA
D.sinA<cosA
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为筹备班级的初中毕业联欢会,班长对全班同学爱吃哪几种水果作民意调查,从而最终决定买什么水果.下列调查数据中最值得关注的是( )
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下列不等式组的解集,在数轴上表示为如图所示的是( )
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A.
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B.
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C.
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D.
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如图,将一个可以自由旋转的转盘等分成甲、乙、丙、丁四个扇形区域,若指针固定不变,转动这个转盘一次(如果指针指在等分线上,那么重新转动,直至指针指在某个扇形区域内为止),则指针指在甲区域内的概率是( )
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A.1
B.
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C.
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D.
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下列图形中,是轴对称图形的为( )
A.
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B.
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C.
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D.
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