A hollow shaft has an outside diameter of 35 mm and an inside diameter of 25 mm. Compute the torsional shear stress in the shaft when it is subjected to a torque of 560 N·m.
【单选题】The Red Cross is an inter national organization, which cares for people who are in need of help. A man in a Paris 【B1】 who needs blood, a woman in Mexico who was 【B2】 in an accident, and 【B3】 in India...