题目内容

影响固定床床层空隙率的因素有：。

A. 颗粒表面的粗糙度
B. 填充方式
C. 颗粒直径与容器直径之比
D. 颗粒的形状和颗粒的粒度分布

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颗粒直径与床层直径比越大，壁效应对整个床层平均孔隙率的影响越小。

A. 对
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A. exclusive
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