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13．在一次运动会上某同学抛出铅球的部分运动轨迹如图所示已知在b点时铅球的速度与加速度相互垂直空气阻力忽略不计则下列说法中正确的是 Template






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sketch 3083 Great illustration Ali Hänel
sketch 3517 Scratch from Ice Age by VlAd Craciun
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tomski13．在一次运动会上某同学抛出铅球的部分运动轨迹如图所示已知在b点时铅球的速度与加速度相互垂直空气阻力忽略不计则下列说法中正确的是 coloring
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13．在一次运动会上某同学抛出铅球的部分运动轨迹如图所示已知在B点时铅球的速度与加速度相互垂直空气阻力忽略不计则下列说法中正确的是 sketch template
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