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某厂生产甲、产品，产量分别为45个、50个，所用原料为A、B两种规格的金属板，每张面积分别为2m 2 、3m 2 ，用A种金属板可造甲产品3个，乙产品5个，用B种金属板可造甲、乙产品各6个，则A、B两种金属板各取多少，能完成计划并能使总用料面积最省？（ ） A．A用2张，B用6张 B．A用4张，B用5张 C．A用3张，B用5张 D．A用3张，B用6张
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every potential consumer in the world
B.
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