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【单选题】
机械手表的一个齿轮设计尺寸为4mm，生产过程中所允许的误差为（+0.008，-0.008）。某道工序是保证该齿轮上述设计尺寸的最后加工工序，现在需要对该工序的工序能力进行评估，通过对该齿轮产品的随机抽样，经测算，样本平均值和公差在中心重合，样本标准差为s＝0.0025。根据以上资料，回答下列问题：根据该工序的过程能力指数，可以断定该工序的过程能力（）。A.
不足
B.
正常
C.
充足
D.
过剩
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A.
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B.
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C.
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D.
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