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Pat has $$7$$ identical pieces of paper. One or more of the pieces are cut into $$7$$parts each, then one or more of the smaller pieces are cut into $$7$$ parts each again. Which of the following could be the total number of pieces of paper after these cuts have been made?
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5.2.1 平均值
5.2.1 平均值
以上解析由 考满分老师提供。