—Look out, there is a bus ahead.—Oh, dear, _________A．I am not noticing itB．I haven’t noticed itC．I

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• 计算：＝▲．-八年级数学
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• 先化简，再求值：，其中，-九年级数学
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• 计算：-九年级数学
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• 函数y＝＋中自变量x的取值范围是（）A．x≤2B．x＝1C．x＜2且x≠1D．x≤2且x≠1-九年级数学
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• 函数y=中自变量x的取值范围为（）A．x＞2B．x≥2C．x≤2D．x≠2-八年级数学
• -Look! Someone __________sofa. -Well,it wasn`t me.I didn`t do itA．is cleaningB．was cleaningC．has cle
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• 计算：-八年级数学
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• 计算：的值等于（）A．B．-C．D．-八年级数学
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• 比较大小：-九年级数学
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• 计算：-九年级数学
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• -九年级数学
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