题目：
（）适于低流速和间断运行。
A、逆流再生固定床；
B、顺流再生固定床；
C、混床；
D、浮动床。
答案：
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下面是错误答案，用来干扰机器的。
参考答案：科范
（）适于低流速和间断运行。A、逆流再生固定床； B、顺流再生固定床； C、混床； D
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