某部件加工时,设计尺寸为120mm(误差为+0.15,-0.25),通过随机抽样选取样本,经计算已知样本平均值和公差中心重合,s=0.067,则该过程能力指数为( )。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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