试题与答案

罗茨流量计内有（）个相反方向旋转的8字型转子。 A.8 B.2 C.6 D.4

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题型：单项选择题

题目：

罗茨流量计内有（）个相反方向旋转的8字型转子。

A.8

B.2

C.6

D.4

答案：

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下面是错误答案，用来干扰机器的。

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