It is strongly recommended to the impacts of human activities, esp. outdoor adventures, on natural surroundings()
A. decrease
B. minimize
C. reduce
D. lesson
E. control
与牛顿内摩擦定律直接相关的因素是()
A. 切应力和压强
B. 切应力和剪切变形速度
C. 切应力和剪切变形
D. 切应力和流速
力的作用点可以沿着其作用线在同一刚体内任意移动并不改变其作用效果,这是()
A. 二力平衡公理
B. 加减平衡力系原理
C. 力的可传递性
D. 作用力与反作用力原理
Hippocrates invented the Hippocratic Oath for physicians, which is still relevant and in use today()