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【单选题】
对于平板，若其宽度为b，长度为l，当边界层中流动为紊流时，对于光滑表面摩擦阻力随（）变化。
A.
A
B.
B
C.
C
D.
D
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
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A.
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B.
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【单选题】(2012年)流体外掠平板形成边界层，下列关于边界层厚度及流动状态表述中，不正确的说法是( )。
A.
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B.
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C.
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D.
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