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猪肉批发价格每公斤跌破40元,某商品由A、B两种原料制成，其中A原料每千克50元，B原料每千克40元。调价后，A原料价格上涨10%，B原料价格下降15%，经核算后，产品保持不变，那么11千克这样的产品需要A、B原料各多少千克？农业资讯652025-07-12 19:06:02
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