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【判断题】
当流体流动时,流体内部内摩擦力大小与该处的流速大小成正比。A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【简答题】超限、超重车应经由（）运输，但受到建筑限界或其他不利因素影响时，可指定径路绕道运输。
【简答题】Made in the USA: An Export Boom In his State of the Union address two years ago, President Obama argued that in order to recover from the economic recession, one of the few things the U．S. needed to d...
【简答题】Made In The USA: An Export Boom In his State of the Union address two years ago, President Obama argued that in order to recover from the economic recession, one of the few things the U．S. needed to d...
【简答题】平面的质量主要从 和 两个方面来衡量。
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