Nowadays food safety is a big problem and nobody can guarantee all foods are safe to us, but food pr

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• 如果a=（﹣0.1）0，b=（﹣0.1）﹣1，c=（﹣）﹣2，那么a，b，c的大小关系为[]A．a＞b＞cB．c＞a＞bC．c＞b＞aD．a＞c＞b-七年级数学
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• 计算：2﹣3=（）-七年级数学
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• （﹣2）0=（），=（），（﹣3）﹣1=（）．-七年级数学
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• 计算：（）﹣2=（）．-七年级数学
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• =﹙﹚．-七年级数学