Calculate Paasche price index in 20X2, if 20X0 is taken as the base year. A: 117.2 B: 119.3 C: 126.8 D: 120.4
Calculate Paasche price index in 20X2, if 20X0 is taken as the base year. A: 117.2 B: 119.3 C: 126.8 D: 120.4
两端受扭转力偶矩T0作用的圆轴如图所示，经实验测得圆轴表面与轴线成-45°方向的线应变ε= 50×，若材料的弹性模量E=210GPa，泊松比，圆轴直径d= 20mm，则To的大小为（）N？mm A: 79.5 B: 104.1 C: 126.8 D: 142.5
两端受扭转力偶矩T0作用的圆轴如图所示，经实验测得圆轴表面与轴线成-45°方向的线应变ε= 50×，若材料的弹性模量E=210GPa，泊松比，圆轴直径d= 20mm，则To的大小为（）N？mm A: 79.5 B: 104.1 C: 126.8 D: 142.5
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