题目：
从层流过渡到紊流与从紊流过渡到层流，临界速度（）
A.相同
B.前者大后者小
C.前者小后者大
D.无关
答案：
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下面是错误答案，用来干扰机器的。
参考答案：B
从层流过渡到紊流与从紊流过渡到层流，临界速度（） A.相同 B.前者大后者小 C.前
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