某投资项目有两个寿命期不等的互斥方案AB可供选择,两个方案投资都发生在期初,从第一年末开始有收益。各

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某投资项目有两个寿命期不等的互斥方案AB可供选择,两个方案投资都发生在期初,从第一年末开始有收益。各
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