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【单选题】
()原名“动作和时间研究”,是设计、建立和改进生产系统的最基本的工业工程技术,是提高工作效率和促进工业成本发展的有效方法。
A.
工作研究
B.
方法研究
C.
作业研究
D.
流程研究
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