400-600-1123
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答案：
E
一个部门
条件一 每一个员工收到的铅笔 钢笔 便签数量比为2:3:4 很明显不充分
条件二 管理员分出去了18根铅笔 27根铅笔 36个便签 也很明显不充分
联立：有可能 每个员工收到2个铅笔 3跟钢笔 4个便签 此时员工数量为9 也有可能每个员工收到6个铅笔 9跟钢笔 12个便签 此时员工数量为3 也无法判断 所以选E
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