若分式
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有意义,则实数x的取值范围是
.
考点分析:
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从图中的四张印有汽车品牌标志图案的卡片中任取一张,取出印有汽车品牌标志的图案是中心对称图形的卡片的概率是( )
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A.
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B.
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C.
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D.1
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如图所示几何体的左视图是( )
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B.
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D.
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不等式
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C.
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D.
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