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【单选题】
有一填料吸收塔,填料高 10m ,用清水逆流洗去混合气中有害组分 A ,在一定的操作条件下,测得进、出塔气体中含 A 分别为 Y A,1 = 0.02 , Y A,2 = 0.004 ,出塔液相中含 A 0.008 (均为比摩尔分数)。相平衡常数 m = 1.5 ,问: ( 1 )该操作条件下的气相总传质单元高度为多少 m ( 2 )因要求塔顶出塔气体中含 A 为 0.003 (比摩尔分数),如液气比不变,填料层应加高多少 m
A.
3.61 , 12.73
B.
5.61 , 2.73
C.
3.61 , 7.27
D.
3.61 , 2.73
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The discovery of many 'Living Fossils'.
B.
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C.
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D.
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温水擦浴
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酒精擦浴
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头部及大血管处放置冰袋
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口服退热药
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冰水灌肠
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A.
The discovery of many 'Living Fossils'.
B.
The discovery of a live Coelacanth.
C.
The discovery of the fossils of lobsters.
D.
The discovery of the fossils of sea urchins.
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A.
1.5A
B.
2A
C.
3A
D.
4.5A
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【简答题】What belief about pet behaviour was unacceptable to experts of animal behaviour?
【单选题】The popular belief about obesity is that ______ .
A.
it makes us sleepy
B.
it causes sleep loss
C.
it increases our appetite
D.
it results from lack of sleep
【单选题】In my belief, some of the comments in the movie about the job market are actually ________ of real- life difficulties in find a good job after graduation from universities.
A.
reflections
B.
demonstrations
C.
illuminations
D.
reproductions
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