未知题型
多项选择题 某部件加工的时候,设计尺寸10mm(误差为+0.010,-0.005),通过随机检验,经过计算已经知道:样本平均值和公差中心重合,s=0.008,回答下列问题:工序能力是指在一定的时间范围内,处于稳定状态下加工产品质量正常波动的幅度,以质量特性值分布的六倍标准差来表示,记为6σ,则()。
单项选择题 The reason why the toys most boys play with are different from those that girls play with is that ().
单项选择题 M: Will you be free sometime today?W: I have an appointment with my dentist from 3 to 5. But I’m free after that.When is the woman free?()