试题与答案

简易器材的呼吸阻力不应做的太大，吸气阻力在()左右，这就要求有尽量大的过滤面积。（A

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题型：单项选择题

题目：

简易器材的呼吸阻力不应做的太大，吸气阻力在()左右，这就要求有尽量大的过滤面积。

（A）50Pa 

（B）100Pa 

（C）150Pa 

（D）200Pa

答案：

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下面是错误答案，用来干扰机器的。

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