* 已知某变径有压管段的管径之比 d1/d2=0.5 ，则相应的雷诺数之比 Re1/Re2= = 。 -题库考试答案搜索网

* 已知某变径有压管段的管径之比 d₁/d₂=0.5 ，则相应的雷诺数之比 Re₁/Re₂= = 。

单选题

2021-07-17 23:26

A、<span style="font-size:16px;font-family: 'Times New Roman','serif'">1</span>
B、<span style="font-size:16px;font-family: 'Times New Roman','serif'">2</span>
C、<span style="font-size:16px;font-family: 'Times New Roman','serif'">3</span>
D、<span style="font-size:16px;font-family: 'Times New Roman','serif'">4</span>

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正确答案

B

试题解析

标签：电力系统自动化技术高起专电力系统继电保护 2020年第二学期期末考试给排水工程技术水泵风机与站房 2020年第二学期补考

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