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網(wǎng)課試題
質(zhì)點矩對其質(zhì)心的相對動量矩與質(zhì)點系動量對該點的矩之矢量和等于
參考答案：
質(zhì)點系對任意動點的絕對動量矩
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It is not necessary for an air freight agent be acquainted with the matter of conIt is not necessary for an air freight agent be acquainted with the matter of containerized service． （）
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The most obvious advantage of air freight is of course the ______ of delivery.The most obvious advantage of air freight is of course the ______ of delivery.
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