计算：-九年级数学

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• 计算：-八年级数学
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• 函数中，自变量的取值范围是.-八年级数学
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• 若，则=.-八年级数学
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• 计算：①②-八年级数学
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• 下列运算正确的是[]A．B．C．D．-九年级数学
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• 若，则m的取值范围是。-九年级数学
• ．若的整数部分是a，小数部分是b，则。-九年级数学
• He asked me how much ________ on the mountain bike.A．did I payB．I had spentC．did I spendD．I had cost
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