下列计算正确的是[]A．B．C．D．-九年级数学

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• （1）⑵-八年级数学
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• 估计的值()A．在1到2之间B．在2到3之间C．在3到4之间D．在4到5之间-八年级数学
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• 使有意义的x的取值范围是……………………………………………【】A．x≥3B．x≥3且x≠－1C．x≤3D．x＜3-九年级数学
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• 计算：__.-九年级数学
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• 计算：-九年级数学
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• 若的小数部分为x，的小数部分为y，求x+y的值。-八年级数学
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• 计算：-八年级数学
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• 计算=-八年级数学
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• 计算：-八年级数学
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• 若，则=.-八年级数学
• 无理数是()A．无限循环小数B．带根号的数C．除有限小数以外的所有实数D．除有理数以外的所有实数。-八年级数学
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• 的平方根是（）A．B．C．D．-八年级数学