Selecting a mobile phone for personal use is no easy task because technology ____ so rapidly.A．is ch

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• （1）（2）（3）（4）-八年级数学
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• 计算：（）-九年级数学
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• -Have you ever seen Peter recently? --Yes. He__________ me to ask you how you___________ along with
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• 化简的结果是（）．-八年级数学
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• -八年级数学
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• （1）（2）（3）（4）-八年级数学
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• 计算（）-八年级数学
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• 的值是[]A.7B.-1C.1D.-7-八年级数学
• 计算：-八年级数学
• 计算的值是（）。-八年级数学
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