4. 美萍用量来测量水的体积。下面哪项是读取读数时的正确方法? OA量筒放在桌上,眼睛直視量简并与三月面平行
B以最靠近量的巨宫读取读数
C. 用手捏着量管才读取关数
CD可以从各方向读取達人​

A250-n box is at rest on a frictionless horizotal floor. then a person shoves the box with a non-zero force of magnitude p. which statement best describes the relationship betweeen p and the motion of the box after it was shoved? -the box will not move when p< 250n but otherwise will accelerate at a constant rate that is directly proportional to p - the box will begin moving at a speed that is directly proportional to p, then will gradually slow to a halt -the box will move with constant velocity at a speed that is directly proportional to p -box will accelerate across the floor at a constant rate that is directly proportional to p