关于平抛运动,下面的几种说法?正确的是 [ ]A.平抛运动是一种不

关于平抛运动,下面的几种说法?正确的是 [  ]
   A.平抛运动是一种不受任何外力作用的运动
   B.平抛运动是曲线运动,它的速度方向不断改变,不可能是匀变速运动
   C.平抛运动可以分解为水平方向的匀速直线运动和竖直方向的自由落体运动
   D.平抛运动的落地时间与初速度大小无关,而落地时的水平位移与抛出点的高度有关

答案

CD

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