Directions: Choose correct expression from the following word bank. door man Chinese restaurant head porter health club luggage cart luggage deposit bellman beauty parlor luggage tag recreation club western restaurant luggage
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参考答案:
举一反三
【简答题】已知某质量数据, 整理后得知: 20个单值的和等于40,19个移动极差的和等于0.38,求X-R S 控制图的Lcl X