check01 www.bespokeinvest.com/
回答: 自由落体是指在无初速的情况下释放物体,物体没有受到任何其他的力,所以物体只受到了重力,此时物体下落的加速度就是重力多带来的
由 marketreflections
于 2011-07-28 16:29:21
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