The ice cream cone and the iced tea were all introduced at t

The ice cream cone and the iced tea were all introduced at the 1904 Louisiana Pu

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抽样调查的目的是获得准确无误的样本数据。( )

抽样调查的目的是获得准确无误的样本数据。( )

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如图,正方形ABCD和正方形ECGF并排放置,BF与EC相交于点H,已知AB=6厘米,FG=10厘米,则阴影部分的面积是

如图,正方形ABCD和正方形ECGF并排放置,BF与EC相交于点H,已知AB=6厘米,FG=10厘米,则阴影部分的面积是多少平方厘米?

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