【判断题】任何轴向受拉杆件中,横截面上的最大正应力都发生在轴力最大的截面上。
【判断题】任何轴向受拉杆件中,横截面上的最大正应力都发生在轴力最大的截面上。
【判断题】运动强度越高,动作越复杂、活动变换越频繁,训练水平越高,则进入工作状态的时间越快。
【单选题】He admits that much of his success is _________ his good luck.
【单选题】He ____ much of his success and happiness _____his wife and children.