长500m，直径20mm的电缆线，在风速为22m/s的大风中所受绕流阻力D=3821

发布时间：2017-12-21 06:08 │ 来源：www.tikuol.com

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问题：

长500m，直径20mm的电缆线，在风速为22m/s的大风中所受绕流阻力D=3821N，空气密度ρ=1.29kg/m³，则其绕流阻力系数C_D为（）。

A．1.01

B．1.22

C．1.41

D．1.62

考点：注册土木工程师岩土工程基础知识基础知识

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完形填空。
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