如图所示铅球从出手到将要落地的过程中下列说法中正确的是a.铅球在a点时动能最大b.铅球在b点时势能最大c.铅球在c点时机械能最小d Template




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tomski如图所示铅球从出手到将要落地的过程中下列说法中正确的是a.铅球在a点时动能最大b.铅球在b点时势能最大c.铅球在c点时机械能最小d coloring