Technical details of the Shimano WH-RS710-C46-TL-R rear wheel tire type: clincher, Tubeless compatible construction: hooked wheel size: 28 inch (700C) outer width: 28 mm / inner width: 21 mm / profile height: 46 mm brake disc mount: Centerlock freewheel: Pawl bearings: cup and cone,...
地球对物体的重力只作用在物体的重心上 D. 若用一根轻质细线把一物体悬挂起来,当物体静止时其重心一定在过悬线的这条直线上 **答案**: D **分析**:答案:D 解析:形状规则、质量分布均匀的物体的重心在其几何中心上,而重心可...