液体停留时间分布及其流动模型的测定:限制返混的措施有那些?
参考答案:
器内反应流体的流动状态和混合状态的复杂性,反应流体在反应器内浓度、温度和速度的分布造成返混。
— Did you hear that Jim quarreled with his wife?
— I didn't, and________about it.
A. nor don't I care
B. nor do I care
C. I don't care neither
D. I don't care also
斑秃的病程可分为()
A.红斑期和静止期
B.静止期和恢复期
C.进展期和静止期
D.红斑期、进展期和恢复期
E.进展期、静止期和恢复期