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【单选题】
数据2，3， ，4的平均数是3，则这组数据的众数是 [ ]A.
1
B.
2
C.
3
D.
4
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参考解析：
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皮皮学刷刷变学霸
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【单选题】对于牛顿流体的本构方程，下列说法错误的是
A.
反映了牛顿流体的应力与应变之间的关系
B.
对牛顿流体的本构方程两边同时取散度可推导出 N-S 方程
C.
某位置的平均压力与流体微元体变形速率相关
D.
某位置的平均压力为流体微元三个坐标轴方向的法向应力的平均值
【简答题】A．Because they have no sisters or brothers. B．Because they are overprotected by their parents. C．Because their parents expect too much of them. D．Because their parents often punish them for minor faul...
【简答题】Most people buy a lot of gifts just before Christmas. But some people think they buy too much. They have started a special day called Buy Nothing Day. They don’t want anyone to go shopping on that d...
【简答题】A．They have no sisters or brothers. B．They are overprotected by their parents. C．Their parents expect too much of them. D．Their parents often punish them for minor faults.
【简答题】轴列式为A-A的四轴轨道车的四个车轴轮对中,第 轴的轮对为驱动轮。
【单选题】对于牛顿流体的本构方程，下列说法错误的是;
A.
反映了牛顿流体的应力与应变之间的关系
B.
对牛顿流体的本构方程两边同时取散度可推导出 N-S 方程
C.
平均压力与体变形速率相关
D.
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