16=______，38的平方根是______．-数学

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• 下列说法正确的是（）A．一个数的算术平方根都是正数B．一个数的立方根有两个，它们是互为相反数C．只有正数才有平方根D．一个数的立方根与这个数的符号相同-数学
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• 的平方根是[]A．3B．±3C．D．±-九年级数学
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