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某饲养场饲养了某种动物，每只动物每天至少需要蛋白质200克、矿物质4克、维生素5毫克。市场上销售的甲乙两种饲料每公斤的营养成分及单价如下：饲料蛋白质（克）矿物质（克）维生素（毫克）单价（元/公斤）甲5

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A、6

B、8

C、10

D、12

参考答案:

B

这题和上题解法一样设甲X，乙Y50x+40y>=200X+0.5y>=40.5x+y>=5Min(x+1.5y)X,y>=0

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