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一、选择题1.下列关于平抛运动说法正确的是()。A.在空中以某一初速度水平抛出的物体一定做平抛运动B.做平抛运动的物体一定做变加速曲线运动C.做平抛运动的物体在相等时间内速度变化一定相等D.做平抛运动的物体,从抛出开始算起在连续相等时间内的运动位移之比为1:3:5
First, multiple-choice questions 1. The following is true about flat throwing exercise is (). A. Objects thrown at an initial velocity in the air must be flat throwing motion B. Objects to be flattened and throwing must be accelerated and accelerated C. Objects subjected to flat throwing motion must be equal in speed at equal times D An object that does a flat throwing motion has a 1: 3: 5 ratio of 1: 3: 5 movement displacement in a continuous equal time period from the start of the throw