未分类题

机械零件受载时,在______处产生应力集中,应力集中的程度通常随材料强度的增加而______。

【参考答案】

截面形状突变处$增大
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多项选择题
摩擦副接触面间的润油状态判据参数膜厚比λ值为______时,为混合润滑状态λ值为时,可达到液体润滑状态。 A.0.35 B.1.5 C.5.2
A.0.35
B.1.5
单项选择题
A company’s budgeted sales for last month were 10,000 units with a standard selling price of 204,750 were achieved. What were the sales price and sales volume contribution variances?
A.5,250 adverse , 4,000 favourable
B.5,250 adverse , 4,000 adverse
C.5,000 adverse , 4,000 favourable
D.5,000 adverse , 4,000 adverse
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