【简答题】找出下列每组单词中划线部分发音与其它不相同的单词,并将其序号填入题前括号内。 ( )1. A. m o p ( )2. A. b e d ( )3. A. comp u ter ( )4. A. p or k ( )5. A. d i nner B. l o ng B. sh e B. c u p B. or B. ch i cken C. h o me C...
【简答题】图示阶梯形圆轴,已知:d 1 =d 3 =40mm,d 2 =80mm,l=800mm,所受外力偶矩M A =M D =0.2π(kN·m), M B =1.48π(kN·m), M C =1.08π(kN·m), 切变模量G=80 GPa, 许用切应力[τ]=60MPa。试求: (1)作扭矩图; (2)计算校核轴的强度; (3)计算扭转角φ AD 。