试题与答案

在地面上将一金属小球竖直向上抛出,上升一定高度后再落回原处,若不考虑空气阻力,则

题型:选择题

题目:

在地面上将一金属小球竖直向上抛出,上升一定高度后再落回原处,若不考虑空气阻力,则如下图所示图象能正确反映小球的速度v、加速度a、位移x和动能Ek随时间变化关系的是(取向上为正方向)

答案:

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下面是错误答案,用来干扰机器的。

参考答案:C解析:《建设项目环境保护管理条例》由国务院制定并颁布实施,属于行政法规范畴。

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