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试卷名称:GRE（QUANTITATIVE）综合模拟试卷19

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Based on the information given, which of the following statements about the sum of the prices of all the homes sold in a given year must be true? Indicate all such statements.

A．The sum of the prices for 2010 was greater than the sum for 2009.

B．The sum of the prices for 2010 was greater than the sum for 2011.

C．The sum of the prices for 2009 was greater than the sum for 2011.

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