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若am=2,an=5,则am﹣n=____
粮店有大米10袋,面粉25袋,共重1125千克,已知1袋大米的重量和2袋面粉的重量相等,那么一袋大米和一袋面粉各重____千克。
——What do you think of the film Switch?——Wonderful. But I am sorry I the beginning of it.