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公务员考试：工程问题缺少数据没有固定解？巧用赋值法求工作时间
【2015山西-54】甲、乙、丙三个施工队，乙的工效与甲、丙两队合作的工效相等，丙的工效是甲、乙两队合作工效的四分之一。现有一项工程，据测算，三队合作30个工作日可完成。如果由甲队单独来做，需要多少个工作日: A.60 B.96 C.100 D.150
公务员考试数量关系刷题组14/53
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