如图所示,刚体质量为 m ,其质心到两互相平行的轴 z 1 、 z 的距离分别是 a 、 b 。已知对 z 轴的转动惯量为 J z ,则对 z 1 轴的转动惯量为 。
A.
正确
B.
错误
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【简答题】As the sea ice melts sooner each swimmer,polar bears are forced to come ashore earlier and face food shortages _____ they have stored enough fat to last them through the season. [ ] A .before B. u...
【单选题】As the sea ice melts sooner each swimmer,polar bears are forced to come ashore earlier and face food shortages _____ they have stored enough fat to last them through the season.